A Checklist of the Bees of Utah
1
Department of Biology, Utah State University—Tooele, Tooele, UT 84074, USA
2
Pollinating Insects Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Logan, UT 84322, USA
3
Native Pollinator Project, Santa Fe, NM 87501, USA
*
Author to whom correspondence should be addressed.
Diversity 2025, 17(3), 212; https://doi.org/10.3390/d17030212
Submission received: 11 February 2025
/
Revised: 6 March 2025
/
Accepted: 10 March 2025
/
Published: 14 March 2025
(This article belongs to the Section Animal Diversity)
Abstract
:Understanding bee distributions is essential to protecting these vital pollinators. Since conservation efforts and policies are often made at the state level, maintaining state-specific bee species lists can aid conservationists and policy makers. While several North American state- and province-level bee species lists have been published, few exist for the arid western states, where bee diversity tends to be higher. Here we provide a bee species list for Utah, compiled from online occurrence records from the Symbiota Collection of Arthropods Network (SCAN) and specimen records housed in the USDA-ARS Pollinating Insect Research Unit (BBSL). In total we document 1167 bee species in the state of Utah. Given the proportion of undescribed and unidentified bee species from other bee faunal surveys in Utah, we estimate that there could be up to 1500 bee species in the state. These findings highlight Utah as one of the most bee-rich regions, based on published species lists, though other western states likely house rich bee faunas. These data serve as a valuable baseline for future studies on bee diversity and declines.
1. Introduction
Efforts to conserve and preserve wild bees are often impeded by a lack of location-based data; at local, regional, and state levels, extensive geographic data deficiencies exist regarding bee diversity and distributions [1]. Several characteristics of bees, such as their limited distributions, seasonal and annual population fluctuations, small size, and elusive behaviors, make it challenging to develop comprehensive and informative regional checklists that are useful for land management. Land managers face challenges in identifying priority areas for protection, assessing population trends, and mitigating threats, such as habitat loss, pesticide use, and climate variability, without reliable and complete distribution maps. Additionally, determining which species should be prioritized when making conservation-based decisions can be impeded by spatial gaps, data that are not digitized, and dispersed records across isolated databases. Addressing this knowledge gap is crucial for developing effective strategies to support the health and resilience of wild bee communities.
One scale at which compiling and distributing geographic information on bee populations can be most beneficial is at the state level. Pulling together a state list of bees can aid multiple tiers of policy makers; nationally, species assessments pull from published datasets and literature on the one hand, while locally, pollinator conservation programs rely on insights into the wild bees on intra-state units of land. While state boundaries seldom reflect the biological or ecological reasons for bee occurrences, they do match the scale at which land management decisions are often made and thus can contribute to informed conservation. As a reflection of this, a number of state checklists have been published in recent years (Table 1). The majority of the published (either in journals or online) checklists are from the northeastern parts of North America (Figure 1). Western states, however, tend towards higher bee diversity, and so lists for these areas may be especially valuable for identifying hotspots of bee biodiversity, under-sampled regions, and areas where conservation efforts will be most efficient and effective.
On the surface, creating a state-level bee species checklist is a simple and straightforward task. At a deeper level, however, the nuances of creating a checklist are many and can lead to a tendency to underestimate or misrepresent the presence of species. First, most distributional data for bees reside in insect collections. For older specimens, the hand-written or typed label beneath the specimen is the only documentation of origin until those records are retroactively added to digital databases. Currently, many older insect collections are involved in retroactive digitization efforts, and data will eventually be available online, but work is ongoing; therefore, a checklist for a state will be incomplete until the work of digitization is finished. Second, many states, particularly in the western U.S., include large regions that have been poorly sampled, leaving large gaps in data both geographically and taxonomically [1]. Finally, datasets are seldom without error. Errors occur in the form of mistakes made at the time of collecting or identifying the bee (label generation or label reading errors and taxonomic mistakes, respectively), or in the form of incorrectly digitized data that fail to accurately capture from labels what is known about a specimen [24]. In a similar vein, bee nomenclature changes over time, and digitized records do not always track the most recent naming conventions.
Without a priori knowledge of bee biology and distributions, it can be difficult to detect some of these errors. For example, many online bee records list the bee commonly known as the “squash bee” as Peponapis pruinosa. This genus, however, was recently synonymized with Eucera [25], so other online records list the species as Eucera pruinosa. A more recent revision of the group reorganized the genus Eucera [26], placing Eucera pruinosa in the genus Xenoglossa, making the correct current nomenclature for this species Xenoglossa (Peponapis) pruinosa. For distributional data, errors are best determined and fixed through cross-referencing collection information, examining meta-data, and checking the likelihood of a species in an area and assigning probabilities. This can be complicated by new species being introduced to areas outside their native ranges (e.g., [27]); does what looks to be an erroneous record actually represent a range expansion?
Despite the challenges of taxonomic and distributional errors in data, checklists have proven valuable for many researchers and land managers. Checklists generally follow two main formats: they are either published in a peer-reviewed journal, or online as a living document that can be more easily updated as information is gleaned through more digitization or field work. In both cases, they provide solid numbers for bee species richness and bee species distributions, thus avoiding the need to use an educated guess as the metric for comparison (e.g., “over 1000 bee species exist in Utah” [28]). While estimated species richness can be important for outreach efforts, state checklists can also help better understand the extent of species distributions, can provide an anchor for comparison with other regions, and can help researchers to determine rarity and endemism among bees.
Here we provide a bee species checklist for Utah, an area predicted to have some of the highest bee species richness in the United States [24]. This species list (like most published species lists) will undoubtedly grow with increased collecting and as unidentified bee specimens are identified and described.
2. Materials and Methods
One of the main deterrents to researchers publishing state-level bee species checklists is the availability and reliability of data. Knowing these limitations, we initially built our checklist based on downloaded bee species data from the Symbiota Collections of Arthropods Network (SCAN: https://scan-bugs.org/ (accessed on 11 March 2025)). This large online database contains records from over 225 North American providers, including large academic insect collections, and observational databases, like iNaturalist and BugGuide. Bee specimen data were first obtained by searching for each North American bee family (Andrenidae, Apidae, Colletidae, Halictidae, Megachilidae, and Melittidae), with records filtered for the state of Utah. These six datasets were then combined into a single large database with all bee records from Utah. Next, we simplified the database to only include the following columns: Family, Genus, Species, and County. Duplicate records were then removed, leaving a list of unique bee species for each Utah county. In addition to the publicly available bee data, we also examined the large database housed by the USDA-ARS Pollinating Insect Research Unit (BBSL), in Logan Utah. While some of this database is accessible through SCAN, not all records are available. Both the SCAN and BBSL datasets are regularly updated with new specimen records so no temporal discrepancies exist between datasets.
Once we had simplified our dataset to include species and county records from both the BBSL dataset and the SCAN dataset, we had to validate both the taxonomic and the distributional data. We did this by comparing each bee species name present in our dataset to curated taxonomies in online datasets, particularly discoverlife.org (accessed on 11 March 2025), and iNaturalist.org (accessed on 11 March 2025). If the species name in our dataset did not match the records from the online sources, we attempted to determine the correct species name. For example, often species names in the database had incorrect specific epithet endings and were corrected (e.g., Lasioglossum amicus was changed to Lasioglossum amicum). Other species names in our dataset had incorrect generic placements (likely reflecting older taxonomies); these were corrected. Unfortunately, there is no source that has all of the current taxonomy for bees so, when we were aware of taxonomic changes that had not been updated online, we made those changes (e.g., Peponapis to Xenoglossa).
In addition to making taxonomic edits to our dataset, we checked that species reported to exist in Utah were correctly georeferenced. To do this, we confirmed records in our dataset by searching each species on discoverlife.org and iNaturalist.org utilizing their maps to ensure the specimen could be substantiated with reference to other data. If a species was represented by many specimens in Utah on these websites and in our data, it was clearly valid. Occasionally, a species was only represented in Utah by a single specimen or a limited number of specimens. In these circumstances, we considered the Utah record valid if the species was known from neighboring regions and therefore was likely also to be found in Utah. There were some Utah records that placed a species far outside of its native range. One species, known only from Europe, and represented by one specimen in our dataset, and with no other records in the U.S., was considered to be a mistake, and was removed from our final list. In contrast, a record found in Utah for a European species that was previously known to have colonized the U.S. was accepted as valid (e.g., Osmia cornifrons). In addition to some suspected data errors for species from other continents mistakenly placed in Utah, there were some records of species otherwise known only from the eastern United States. We eliminated these on a case-by-case basis. If a doubtful species also had records in neighboring states, we generally considered these Utah records to be valid (i.e., Xylocopa virginica); if the questionable species was only known from the eastern Atlantic states and not in any states near Utah, we considered these records as mistakes (unless there was photographic evidence on sites like iNaturalist.org), and they were removed from the data.
Our methods for cleaning the bee species data for Utah used a conservative approach, removing a species from the final list if it was not clearly documented in the state. This makes our state species list a likely underrepresentation of the actual species richness in the state. Furthermore, we only included records with species-level identifications and eliminated any morphospecies from the data. Many genera are poorly represented because they are difficult to identify and/or because there are no recent revisions (e.g., Nomada) or the genus has never been revised for the Nearctic (e.g., Sphecodes), so species level identifications are often not possible. This further reinforces the argument that our species list is an underestimate of actual bee richness.
Once the taxonomic status, names, and georeferencing errors were corrected in the data, we parsed the large dataset into county-level data, which can be used by land managers, educators and conservationists at a more local scale. It should be noted that there is inequality in collecting effort across counties (see [24]), therefore our species lists (both at the county level and state level) need to be viewed as a starting point, not a final comprehensive product.
3. Results and Discussion
Our analysis from multiple datasets resulted in a total of 1167 described bee species for the state of Utah (Table A1). Species richness was higher in counties in the southern part of the state (Figure 2), with the exception of Cache County. Utah State University and the USDA Pollinating Insect Research Unit are both located in Cache County, so there has likely been greater collecting effort here compared to other counties, which could account for the high species richness found here. Similarly, Garfield and Kane Counties, which are home to Grand Staircase-Escalante National Monument, may have higher recorded species richness because of the long-term studies that have occurred in that monument [29,30]. It is likely that county level species richness (Table S1) is not the result of county size as much as a function of sampling effort, and that increased sampling will expand many richness values.
At the family level, Andrenidae, Apidae, and Megachilidae were represented by the most species, each having over 300 species in the state, followed by Halictidae with 131 species, Colletidae with 54 species, and Melittidae with only six species (Figure 3). In Utah, Andrena was represented by the most species (N = 157), followed by Perdita (N = 127), then Lasioglossum and Osmia (N = 91 each). In all, there were six genera that were represented by over 50 species; in contrast, 18 genera were only represented by a single species each (see Figure 3 for details).
One possible reason for Utah’s higher bee species richness compared to other states could be its seasonal patterns of bee diversity. The limited number of state checklist studies reporting patterns of bee richness across the season indicate that bees follow a unimodal pattern of species richness in states such as Washington and Indiana [7,22] with species richness peaking in June. Although we did not directly analyze seasonality in our dataset, multiple regional studies on bee richness in Utah indicate a bimodal pattern, with one peak in June and another in late August [29,31,32]. Furthermore, the spring bee fauna is quite distinct from the late summer bee fauna in Utah, with relatively few species being present across the entire season. Another reason could be the high number of distinct habitats resulting from Utah’s varied topography, climate, and elevation ranges, as well as the unique weather patterns associated with different portions of the state. There are seven level III ecoregions and 37 level IV ecoregions in Utah spanning hot deserts, cold deserts, canyonlands, semiarid shrublands and forested mountains, woodlands, and high alpine peaks. Many bee species in Utah are associated with unique ecoregions and endemism is common [29,30,32].
While the 1167 bee species reported here make Utah one of the most species-rich states in North America (compared to those with published species lists (Table 1, Figure 1), Utah likely houses dozens if not hundreds more species that are either new to science or are only known as morphospecies. In the study of bees in Grand Staircase-Escalante National Monument, 660 bee species were found; of these 138 were morphologically distinct and require additional research before species designations can be made, and 49 were entities that differ from published keys and are unique based on comparison with all specimens located in the USDA Pollinating Insects Research Unit Collection [29]. This means that over 28% of the species identified from the monument were not positively identified to a recognized species, and therefore, are not included in our final dataset of Utah bee species, and more than 7% are undescribed new species. Similar under-representation is documented for the San Rafael Desert bee fauna [32]. Of the 333 species of bees found as the result of repeated visits to this region of sandstone monuments and sand dunes [32], 40 were undescribed species (12%). Only six of these have since been published [33,34,35,36,37,38]. If we assume a similar proportion of undescribed and not positively identified bee species for the state of Utah, the estimate would suggest that nearly 1500 species live in the state.
The bee species data from both datasets used to compile our state species list were largely consistent. In total, 990 species (about 85% of the species recorded from the state) were present in both BBSL and SCAN databases. However, 102 species (8.7% of species recorded from the state) were only present in the BBSL database, and 76 species (6.5% of species recorded from the state) were only present in the SCAN database. Both of these datasets rely largely on digitized specimen label data and they highlight the need to continue the laborious effort to digitize insect collections across the world so specimen data can be more freely accessed. The BBSL collection, which has over 1.5 million bee specimens, contains specimens from many detailed faunal surveys from various western landscapes, particularly targeting Utah (e.g., Grand Staircase-Escalante National Monument [29], Dugway Proving Ground [31,39], San Rafael Desert [32] and Curlew Valley [40]). These in-depth studies document rich bee communities at regional scales, often finding many rare and new species [29,32]. SCAN data included nearly 210,000 specimen records from 53 different collections. The majority of Utah bee records in the SCAN dataset came from the BBSL collection with over 175,000 specimens being included in the SCAN database (83% of bee records from the state). However, several other collections contributed important amounts of data. For example, the SEMC collection at the University of Kansas contributed over 7400 specimens to the SCAN data and the Native bee inventory and monitoring lab (BIML) contributed 4160 specimens
In addition to data based on physical insect specimens, the SCAN dataset also includes records from photographs uploaded to iNaturalist, highlighting the value of this newer form of data collection. While museum-based datasets are invaluable, ongoing observational data can offer continuous insights into species distributions, complementing traditional faunal surveys in locations where they may be lacking. Databases like iNaturalist have proven useful for documenting rare bee species (e.g., [41]) and, as we demonstrate, can add valuable information to state checklists. While only about 2700 bee species records were included in the Utah bee data from iNaturalist in the SCAN dataset (only about 1% of the data points), these records included two species not recorded in any of the collections-based data. One of these, Xylocopa virginica, is a carpenter bee found primarily east of the Rocky Mountains and the other, Hylaeus punctatus, is a European species that was relatively recently introduced to North America. Both of these iNaturalist observations were from the metropolitan Salt Lake City area (largely absent in university collections) and both represent new state records.
4. Conclusions
Our findings document 1167 described bee species in the state of Utah, the richest state bee fauna yet documented in North America. This species list will undoubtedly grow with additional observations and collections and from determinations of unidentified specimens already in collections. While we acknowledge that this species list is fluid, it provides an important baseline to document Utah’s bees that can inform conservation efforts at the state level. Furthermore, state species lists can act as a baseline so future analyses of bee decline can be better calibrated.
Supplementary Materials
The following supporting information can be downloaded at: https://www.mdpi.com/article/10.3390/d17030212/s1, Table S1: Bee species lists for counties in Utah.
Author Contributions
Conceptualization, J.S.W. and O.M.C.; methodology, J.S.W. and A.H.; investigation, J.S.W. and A.H.; resources, T.L.G.; writing—original draft preparation, J.S.W., O.M.C. and T.L.G.; writing—review and editing, J.S.W., A.H., O.M.C. and T.L.G. All authors have read and agreed to the published version of the manuscript.
Funding
This research received no external funding.
Institutional Review Board Statement
Not applicable.
Data Availability Statement
All data can be found in the tables and Supplementary Materials.
Acknowledgments
We acknowledge all the scientists and technicians that painstakingly entered label data into online databases, making papers like this possible. Thanks to Harold Ikerd for curation of the BBSL record set. We recognize the value provided by records from National Park Service units in Utah (Arches, Bryce Canyon, Canyonlands, Capitol Reef, Dinosaur, Zion). We are also grateful to the scientists and naturalists that add identification data to observations on sites like iNaturalist.org.
Conflicts of Interest
The authors declare no conflicts of interest.
Appendix A
Table A1.
Bee species found in Utah. Species are organized by family; the database in which each species was included is also listed. BBSL is the USDA Pollinating Insect Research Unit database and SCAN is the Symbiota Collections of Arthropods Network database.
Table A1.
Bee species found in Utah. Species are organized by family; the database in which each species was included is also listed. BBSL is the USDA Pollinating Insect Research Unit database and SCAN is the Symbiota Collections of Arthropods Network database.
| Family | Species | Author | Dataset |
|---|---|---|---|
| Andrenidae | Ancylandrena koebelei | (Timberlake, 1951) | BBSL |
| Andrenidae | Ancylandrena larreae | (Timberlake, 1951) | BBSL |
| Andrenidae | Ancylandrena timberlakei | Zavortink, 1974 | BBSL, SCAN |
| Andrenidae | Andrena ablegata | (Cockerell, 1922) | BBSL, SCAN |
| Andrenidae | Andrena accepta | Viereck, 1916 | BBSL, SCAN |
| Andrenidae | Andrena algida | Smith, 1853 | BBSL, SCAN |
| Andrenidae | Andrena alleghaniensis | Viereck, 1907 | BBSL, SCAN |
| Andrenidae | Andrena amphibola | (Viereck, 1904) | BBSL, SCAN |
| Andrenidae | Andrena andrenoides | (Cresson, 1878) | BBSL, SCAN |
| Andrenidae | Andrena angustitarsata | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena anisochlora | Cockerell, 1936 | SCAN |
| Andrenidae | Andrena anograe | Cockerell, 1901 | BBSL, SCAN |
| Andrenidae | Andrena apacheorum | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Andrena arabis | Robertson, 1897 | SCAN |
| Andrenidae | Andrena arctostaphylae | Ribble, 1968 | BBSL, SCAN |
| Andrenidae | Andrena astragali | Viereck and Cockerell, 1914 | BBSL, SCAN |
| Andrenidae | Andrena auricoma | Smith, 1879 | BBSL, SCAN |
| Andrenidae | Andrena aurihirta | Donovan, 1977 | BBSL |
| Andrenidae | Andrena barbilabris | (Kirby, 1802) | BBSL, SCAN |
| Andrenidae | Andrena bendensis | Donovan, 1977 | BBSL, SCAN |
| Andrenidae | Andrena berberidis | Cockerell, 1905 | BBSL, SCAN |
| Andrenidae | Andrena birtwelli | Cockerell, 1901 | BBSL, SCAN |
| Andrenidae | Andrena bruneri | Viereck and Cockerell, 1914 | BBSL, SCAN |
| Andrenidae | Andrena buckelli | Viereck, 1924 | BBSL, SCAN |
| Andrenidae | Andrena caerulea | Smith, 1879 | BBSL, SCAN |
| Andrenidae | Andrena canadensis | Dalla Torre, 1896 | BBSL, SCAN |
| Andrenidae | Andrena candida | Smith, 1879 | BBSL, SCAN |
| Andrenidae | Andrena candidiformis | Viereck and Cockerell, 1914 | BBSL, SCAN |
| Andrenidae | Andrena capricornis | Casad and Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Andrena carlini | Cockerell, 1901 | BBSL, SCAN |
| Andrenidae | Andrena ceanothifloris | Linsley, 1938 | SCAN |
| Andrenidae | Andrena cerasifolii | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Andrena chalybioides | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena chapmanae | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena cheyennorum | Viereck and Cockerell, 1914 | BBSL, SCAN |
| Andrenidae | Andrena chlorogaster | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena chlorura | Cockerell, 1916 | BBSL, SCAN |
| Andrenidae | Andrena chylismiae | Linsley and MacSwain, 1961 | BBSL, SCAN |
| Andrenidae | Andrena cleodora | (Viereck, 1904) | BBSL, SCAN |
| Andrenidae | Andrena coconina | LaBerge, 1980 | BBSL, SCAN |
| Andrenidae | Andrena colletina | Cockerell, 1906 | BBSL, SCAN |
| Andrenidae | Andrena columbiana | Viereck, 1917 | BBSL, SCAN |
| Andrenidae | Andrena commoda | Smith, 1879 | BBSL, SCAN |
| Andrenidae | Andrena costillensis | Viereck and Cockerell, 1914 | BBSL, SCAN |
| Andrenidae | Andrena crataegi | Robertson, 1893 | BBSL, SCAN |
| Andrenidae | Andrena cressonii | Robertson, 1891 | BBSL, SCAN |
| Andrenidae | Andrena cristata | Viereck, 1917 | BBSL, SCAN |
| Andrenidae | Andrena cruciferarum | Ribble, 1974 | BBSL, SCAN |
| Andrenidae | Andrena cupreotincta | Cockerell, 1901 | BBSL, SCAN |
| Andrenidae | Andrena cyanophila | Cockerell, 1906 | BBSL, SCAN |
| Andrenidae | Andrena edwardsi | Viereck, 1916 | BBSL, SCAN |
| Andrenidae | Andrena erythrogaster | (Ashmead, 1890) | BBSL, SCAN |
| Andrenidae | Andrena evoluta | Linsley and MacSwain, 1961 | BBSL, SCAN |
| Andrenidae | Andrena forbesii | Robertson, 1891 | BBSL, SCAN |
| Andrenidae | Andrena frigida | Smith, 1853 | BBSL, SCAN |
| Andrenidae | Andrena gibberis | Viereck, 1924 | BBSL, SCAN |
| Andrenidae | Andrena hallii | Dunning, 1898 | BBSL, SCAN |
| Andrenidae | Andrena haynesi | Viereck and Cockerell, 1914 | BBSL, SCAN |
| Andrenidae | Andrena helianthi | Robertson, 1891 | BBSL, SCAN |
| Andrenidae | Andrena hicksi | Cockerell, 1925 | BBSL, SCAN |
| Andrenidae | Andrena hippotes | Robertson, 1895 | BBSL, SCAN |
| Andrenidae | Andrena hirticincta | Provancher, 1888 | BBSL, SCAN |
| Andrenidae | Andrena illinoiensis | Robertson, 1891 | BBSL, SCAN |
| Andrenidae | Andrena imitatrix | Cresson, 1872 | BBSL, SCAN |
| Andrenidae | Andrena kaibabensis | Ribble, 1974 | BBSL, SCAN |
| Andrenidae | Andrena knuthiana | Cockerell, 1901 | BBSL, SCAN |
| Andrenidae | Andrena kristina | Lanham, 1983 | BBSL, SCAN |
| Andrenidae | Andrena laminibucca | Viereck and Cockerell, 1914 | BBSL, SCAN |
| Andrenidae | Andrena lawrencei | Viereck and Cockerell, 1914 | BBSL, SCAN |
| Andrenidae | Andrena leucomystax | Thorp and LaBerge, 2005 | BBSL, SCAN |
| Andrenidae | Andrena linsleyana | Thorp, 1987 | BBSL, SCAN |
| Andrenidae | Andrena livida | LaBerge, 1977 | BBSL, SCAN |
| Andrenidae | Andrena lomatii | Ribble, 1974 | BBSL, SCAN |
| Andrenidae | Andrena lupinorum | Cockerell, 1906 | BBSL, SCAN |
| Andrenidae | Andrena mackieae | Cockerell, 1937 | BBSL, SCAN |
| Andrenidae | Andrena macoupinensis | Robertson, 1900 | BBSL, SCAN |
| Andrenidae | Andrena mariae | Robertson, 1891 | BBSL, SCAN |
| Andrenidae | Andrena medionitens | Cockerell, 1902 | BBSL, SCAN |
| Andrenidae | Andrena melanochroa | Cockerell, 1898 | BBSL, SCAN |
| Andrenidae | Andrena merriami | Cockerell, 1901 | BBSL, SCAN |
| Andrenidae | Andrena mesoleuca | Cockerell, 1924 | BBSL, SCAN |
| Andrenidae | Andrena microchlora | Cockerell, 1922 | BBSL, SCAN |
| Andrenidae | Andrena milwaukeensis | Graenicher, 1903 | BBSL, SCAN |
| Andrenidae | Andrena miranda | Smith, 1879 | BBSL, SCAN |
| Andrenidae | Andrena miserabilis | Cresson, 1872 | BBSL, SCAN |
| Andrenidae | Andrena mohavensis | Ribble, 1974 | SCAN |
| Andrenidae | Andrena montrosensis | Viereck and Cockerell, 1914 | BBSL, SCAN |
| Andrenidae | Andrena nasonii | Robertson, 1895 | SCAN |
| Andrenidae | Andrena neomexicana | LaBerge, 1967 | BBSL, SCAN |
| Andrenidae | Andrena nevadensis | Cresson, 1879 | BBSL, SCAN |
| Andrenidae | Andrena nigerrima | Casad, 1896 | BBSL, SCAN |
| Andrenidae | Andrena nigrae | Robertson, 1905 | BBSL, SCAN |
| Andrenidae | Andrena nigricula | LaBerge and Bouseman, 1977 | BBSL, SCAN |
| Andrenidae | Andrena nigrihirta | (Ashmead, 1890) | BBSL, SCAN |
| Andrenidae | Andrena nigrocaerulea | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Andrena nivalis | Smith, 1853 | BBSL, SCAN |
| Andrenidae | Andrena nothocalaidis | Cockerell, 1905 | BBSL, SCAN |
| Andrenidae | Andrena nubecula | Smith, 1853 | BBSL, SCAN |
| Andrenidae | Andrena nuda | Robertson, 1891 | BBSL, SCAN |
| Andrenidae | Andrena obscuripostica | Viereck, 1917 | BBSL, SCAN |
| Andrenidae | Andrena pallidifovea | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena pallidiscopa | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena papagorum | Viereck and Cockerell, 1914 | BBSL, SCAN |
| Andrenidae | Andrena pecosana | Cockerell, 1913 | BBSL, SCAN |
| Andrenidae | Andrena perarmata | Cockerell, 1898 | BBSL, SCAN |
| Andrenidae | Andrena perplexa | Smith, 1853 | BBSL, SCAN |
| Andrenidae | Andrena persimulata | Viereck, 1917 | BBSL, SCAN |
| Andrenidae | Andrena pertristis | Cockerell, 1905 | BBSL, SCAN |
| Andrenidae | Andrena piperi | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena platyparia | Robertson, 1895 | BBSL, SCAN |
| Andrenidae | Andrena porterae | Cockerell, 1900 | BBSL, SCAN |
| Andrenidae | Andrena prima | Casad, 1896 | BBSL, SCAN |
| Andrenidae | Andrena prunorum | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Andrena quadrilimbata | LaBerge, 1977 | BBSL, SCAN |
| Andrenidae | Andrena quintiliformis | Viereck, 1917 | BBSL, SCAN |
| Andrenidae | Andrena ramaleyi | Cockerell, 1931 | BBSL, SCAN |
| Andrenidae | Andrena raveni | Linsley and MacSwain, 1961 | BBSL, SCAN |
| Andrenidae | Andrena ribblei | LaBerge, 1977 | BBSL, SCAN |
| Andrenidae | Andrena robertsonii | Dalla Torre, 1896 | BBSL, SCAN |
| Andrenidae | Andrena rufosignata | Cockerell, 1902 | BBSL, SCAN |
| Andrenidae | Andrena rugosa | Robertson, 1891 | BBSL, SCAN |
| Andrenidae | Andrena saccata | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena salicifloris | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Andrena salictaria | Robertson, 1905 | BBSL, SCAN |
| Andrenidae | Andrena schuhi | LaBerge, 1980 | BBSL, SCAN |
| Andrenidae | Andrena scurra | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena scutellinitens | Viereck, 1917 | BBSL, SCAN |
| Andrenidae | Andrena segregans | Cockerell, 1900 | BBSL, SCAN |
| Andrenidae | Andrena semipunctata | Cockerell, 1902 | BBSL, SCAN |
| Andrenidae | Andrena sieverti | Cockerell, 1906 | BBSL, SCAN |
| Andrenidae | Andrena sigmundi | Cockerell, 1902 | SCAN |
| Andrenidae | Andrena sladeni | Viereck, 1924 | BBSL, SCAN |
| Andrenidae | Andrena sola | Viereck, 1917 | BBSL, SCAN |
| Andrenidae | Andrena specularia | Donovan, 1977 | BBSL, SCAN |
| Andrenidae | Andrena sphaeralceae | Linsley, 1939 | BBSL, SCAN |
| Andrenidae | Andrena striatifrons | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Andrena subaustralis | Cockerell, 1898 | BBSL, SCAN |
| Andrenidae | Andrena subchalybea | Viereck, 1917 | BBSL, SCAN |
| Andrenidae | Andrena subtilis | Smith, 1879 | BBSL, SCAN |
| Andrenidae | Andrena sulcata | Donovan, 1977 | BBSL, SCAN |
| Andrenidae | Andrena surda | Cockerell, 1910 | BBSL, SCAN |
| Andrenidae | Andrena thaspii | Graenicher, 1903 | BBSL, SCAN |
| Andrenidae | Andrena topazana | Cockerell, 1906 | BBSL, SCAN |
| Andrenidae | Andrena transnigra | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena tridens | Robertson, 1902 | SCAN |
| Andrenidae | Andrena trizonata | Ashmead, 1890 | BBSL, SCAN |
| Andrenidae | Andrena utahensis | LaBerge, 1967 | BBSL, SCAN |
| Andrenidae | Andrena verbesinae | Viereck and Cockerell, 1914 | BBSL, SCAN |
| Andrenidae | Andrena vicina | Smith, 1853 | BBSL, SCAN |
| Andrenidae | Andrena vicinoides | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena vierecki | Cockerell, 1904 | BBSL, SCAN |
| Andrenidae | Andrena vulpicolor | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Andrena w-scripta | Viereck, 1904 | BBSL, SCAN |
| Andrenidae | Andrena walleyi | Cockerell, 1932 | BBSL, SCAN |
| Andrenidae | Andrena wellesleyana | Robertson, 1897 | BBSL, SCAN |
| Andrenidae | Andrena wheeleri | Graenicher, 1904 | BBSL, SCAN |
| Andrenidae | Andrena wilmattae | Cockerell, 1906 | SCAN |
| Andrenidae | Andrena xanthigera | Cockerell, 1900 | BBSL, SCAN |
| Andrenidae | Andrena zionensis | LaBerge, 1973 | BBSL, SCAN |
| Andrenidae | Andrena ziziaeformis | Cockerell, 1908 | BBSL, SCAN |
| Andrenidae | Calliopsis andreniformis | Smith, 1853 | BBSL, SCAN |
| Andrenidae | Calliopsis anthidia | Fowler, 1899 | BBSL, SCAN |
| Andrenidae | Calliopsis australior | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Calliopsis barri | (Rozen, 1959) | BBSL, SCAN |
| Andrenidae | Calliopsis chlorops | Cockerell, 1899 | BBSL, SCAN |
| Andrenidae | Calliopsis coloradensis | Cresson, 1878 | BBSL, SCAN |
| Andrenidae | Calliopsis coloratipes | Cockerell, 1898 | BBSL, SCAN |
| Andrenidae | Calliopsis fracta | (Rozen, 1952) | BBSL, SCAN |
| Andrenidae | Calliopsis helianthi | (Swenk and Cockerell, 1907) | BBSL, SCAN |
| Andrenidae | Calliopsis hesperia | (Swenk and Cockerell, 1907) | BBSL |
| Andrenidae | Calliopsis larreae | (Timberlake, 1952) | SCAN |
| Andrenidae | Calliopsis meliloti | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Calliopsis nigromaculata | (Timberlake, 1952) | BBSL, SCAN |
| Andrenidae | Calliopsis personata | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Calliopsis philiphunteri | Shinn and Engel, 2003 | BBSL, SCAN |
| Andrenidae | Calliopsis puellae | (Cockerell, 1933) | BBSL, SCAN |
| Andrenidae | Calliopsis rhodophila | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Calliopsis scitula | Cresson, 1878 | BBSL, SCAN |
| Andrenidae | Calliopsis scutellaris | Fowler, 1899 | BBSL, SCAN |
| Andrenidae | Calliopsis subalpina | Cockerell, 1894 | BBSL, SCAN |
| Andrenidae | Calliopsis timberlakei | (Rozen, 1958) | BBSL, SCAN |
| Andrenidae | Calliopsis trifolii | (Timberlake, 1952) | BBSL, SCAN |
| Andrenidae | Calliopsis zebrata | Cresson, 1878 | BBSL, SCAN |
| Andrenidae | Calliopsis zonalis | Cresson, 1879 | BBSL, SCAN |
| Andrenidae | Macrotera arcuata | (Fox, 1893) | BBSL, SCAN |
| Andrenidae | Macrotera echinocacti | (Timberlake, 1954) | BBSL |
| Andrenidae | Macrotera haplura | (Cockerell, 1922) | SCAN |
| Andrenidae | Macrotera laticauda | (Timberlake, 1953) | BBSL, SCAN |
| Andrenidae | Macrotera latior | (Cockerell, 1896) | BBSL, SCAN |
| Andrenidae | Macrotera mortuaria | (Timberlake, 1954) | BBSL, SCAN |
| Andrenidae | Macrotera opacella | (Timberlake, 1956) | BBSL, SCAN |
| Andrenidae | Macrotera tristella | (Timberlake, 1954) | BBSL |
| Andrenidae | Panurginus atriceps | (Cresson, 1878) | BBSL, SCAN |
| Andrenidae | Panurginus beardsleyi | (Cockerell, 1904) | BBSL, SCAN |
| Andrenidae | Panurginus cressoniellus | Cockerell, 1898 | BBSL, SCAN |
| Andrenidae | Panurginus emarginatus | Michener, 1936 | SCAN |
| Andrenidae | Panurginus ineptus | Cockerell, 1922 | BBSL, SCAN |
| Andrenidae | Perdita abbreviata | Timberlake, 1980 | BBSL, SCAN |
| Andrenidae | Perdita adjuncta | Timberlake, 1958 | BBSL, SCAN |
| Andrenidae | Perdita affinis | Cresson, 1878 | SCAN |
| Andrenidae | Perdita albipennis | Cresson, 1868 | BBSL, SCAN |
| Andrenidae | Perdita albonotata | Timberlake, 1954 | BBSL, SCAN |
| Andrenidae | Perdita amoena | Timberlake, 1956 | BBSL, SCAN |
| Andrenidae | Perdita aplopappi | Timberlake, 1960 | SCAN |
| Andrenidae | Perdita argemones | Timberlake, 1956 | BBSL, SCAN |
| Andrenidae | Perdita aridella | Timberlake, 1960 | BBSL, SCAN |
| Andrenidae | Perdita arizonica | Timberlake, 1956 | BBSL, SCAN |
| Andrenidae | Perdita asteris | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita beatula | Timberlake, 1960 | BBSL, SCAN |
| Andrenidae | Perdita bequaertiana | Cockerell, 1951 | BBSL, SCAN |
| Andrenidae | Perdita bohartorum | Timberlake, 1956 | BBSL, SCAN |
| Andrenidae | Perdita bruneri | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Perdita callicerata | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Perdita calloleuca | Cockerell, 1922 | BBSL, SCAN |
| Andrenidae | Perdita cephalotes | (Cresson, 1878) | BBSL, SCAN |
| Andrenidae | Perdita chloris | Timberlake, 1960 | BBSL, SCAN |
| Andrenidae | Perdita cladothricis | Cockerell, 1896 | BBSL |
| Andrenidae | Perdita cognata | Timberlake, 1960 | SCAN |
| Andrenidae | Perdita compta | Timberlake, 1964 | BBSL |
| Andrenidae | Perdita confusa | Timberlake, 1964 | BBSL, SCAN |
| Andrenidae | Perdita coreopsidis | Cockerell, 1906 | BBSL, SCAN |
| Andrenidae | Perdita covilleae | Timberlake, 1958 | BBSL, SCAN |
| Andrenidae | Perdita crassula | Timberlake, 1958 | BBSL |
| Andrenidae | Perdita croceipes | Timberlake, 1960 | BBSL, SCAN |
| Andrenidae | Perdita crotonis | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita depressa | Timberlake, 1968 | BBSL, SCAN |
| Andrenidae | Perdita dolichocephala | Swenk and Cockerell, 1907 | BBSL, SCAN |
| Andrenidae | Perdita dubia | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita duplonotata | Timberlake, 1956 | BBSL, SCAN |
| Andrenidae | Perdita electa | Timberlake, 1960 | BBSL, SCAN |
| Andrenidae | Perdita elegans | Timberlake, 1960 | SCAN |
| Andrenidae | Perdita eremica | Timberlake, 1964 | BBSL, SCAN |
| Andrenidae | Perdita eriogoni | Cockerell, 1925 | BBSL, SCAN |
| Andrenidae | Perdita euzonata | Timberlake, 1964 | BBSL, SCAN |
| Andrenidae | Perdita exclamans | Cockerell, 1895 | BBSL, SCAN |
| Andrenidae | Perdita fallax | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita fallugiae | Timberlake, 1956 | BBSL, SCAN |
| Andrenidae | Perdita festiva | Timberlake, 1958 | BBSL, SCAN |
| Andrenidae | Perdita flavifrons | Timberlake, 1968 | BBSL, SCAN |
| Andrenidae | Perdita geminata | Timberlake, 1964 | BBSL, SCAN |
| Andrenidae | Perdita genalis | Timberlake, 1964 | BBSL, SCAN |
| Andrenidae | Perdita glabrescens | Timberlake, 1962 | BBSL, SCAN |
| Andrenidae | Perdita gracilis | Timberlake, 1964 | BBSL, SCAN |
| Andrenidae | Perdita gutierreziae | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita haigi | Timberlake, 1962 | BBSL, SCAN |
| Andrenidae | Perdita halictoides | Smith, 1853 | BBSL, SCAN |
| Andrenidae | Perdita heliophila | Cockerell, 1916 | SCAN |
| Andrenidae | Perdita heliotropii | Cockerell, 1900 | BBSL, SCAN |
| Andrenidae | Perdita heterothecae | Cockerell, 1900 | BBSL, SCAN |
| Andrenidae | Perdita hirsuta | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita hirticeps | Timberlake, 1960 | BBSL, SCAN |
| Andrenidae | Perdita holoxantha | Timberlake, 1962 | BBSL, SCAN |
| Andrenidae | Perdita idonea | Timberlake, 1968 | BBSL, SCAN |
| Andrenidae | Perdita ignota | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita imbellis | Timberlake, 1968 | BBSL, SCAN |
| Andrenidae | Perdita inornata | Timberlake, 1962 | BBSL, SCAN |
| Andrenidae | Perdita jucunda | Timberlake, 1962 | BBSL, SCAN |
| Andrenidae | Perdita kanabensis | Timberlake, 1971 | BBSL, SCAN |
| Andrenidae | Perdita knowltoni | Timberlake, 1960 | BBSL, SCAN |
| Andrenidae | Perdita koebelei | Timberlake, 1964 | SCAN |
| Andrenidae | Perdita labergei | Timberlake, 1960 | BBSL, SCAN |
| Andrenidae | Perdita larreae | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita lateralis | Timberlake, 1962 | BBSL, SCAN |
| Andrenidae | Perdita laticincta | Swenk and Cockerell, 1907 | BBSL, SCAN |
| Andrenidae | Perdita lepidosparti | Timberlake, 1958 | BBSL, SCAN |
| Andrenidae | Perdita leucostoma | Timberlake, 1956 | BBSL, SCAN |
| Andrenidae | Perdita lingualis | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita luciae | Cockerell, 1899 | BBSL, SCAN |
| Andrenidae | Perdita luteola | Cockerell, 1894 | BBSL, SCAN |
| Andrenidae | Perdita maculigera | Cockerell, 1896 | BBSL |
| Andrenidae | Perdita marcialis | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita meconis | Griswold, 1993 | BBSL, SCAN |
| Andrenidae | Perdita melanostoma | Swenk and Cockerell, 1907 | SCAN |
| Andrenidae | Perdita mesillensis | Timberlake, 1968 | BBSL, SCAN |
| Andrenidae | Perdita minima | Cockerell, 1923 | BBSL, SCAN |
| Andrenidae | Perdita moabensis | Timberlake, 1971 | BBSL, SCAN |
| Andrenidae | Perdita mohavensis | Timberlake, 1956 | BBSL, SCAN |
| Andrenidae | Perdita mormonica | Timberlake, 1956 | BBSL, SCAN |
| Andrenidae | Perdita morula | Timberlake, 1980 | BBSL, SCAN |
| Andrenidae | Perdita multiflorae | Parker, 1988 | BBSL, SCAN |
| Andrenidae | Perdita munda | Timberlake, 1958 | BBSL, SCAN |
| Andrenidae | Perdita nasuta | Timberlake, 1962 | BBSL, SCAN |
| Andrenidae | Perdita nigridia | Timberlake, 1962 | BBSL |
| Andrenidae | Perdita nuda | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita nuttalliae | Portman, 2016 | BBSL |
| Andrenidae | Perdita ordinata | Timberlake, 1962 | BBSL, SCAN |
| Andrenidae | Perdita oregonensis | Timberlake, 1929 | BBSL, SCAN |
| Andrenidae | Perdita percincta | Timberlake, 1968 | SCAN |
| Andrenidae | Perdita perpallida | Cockerell, 1901 | SCAN |
| Andrenidae | Perdita perplexa | Timberlake, 1962 | BBSL, SCAN |
| Andrenidae | Perdita perpulchra | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita phymatae | Cockerell, 1895 | BBSL, SCAN |
| Andrenidae | Perdita punctosignata | Cockerell, 1895 | BBSL, SCAN |
| Andrenidae | Perdita rectangulata | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita rhodura | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Perdita salicis | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita scitula | Timberlake, 1960 | SCAN |
| Andrenidae | Perdita sejuncta | Timberlake, 1968 | SCAN |
| Andrenidae | Perdita similis | Timberlake, 1958 | BBSL, SCAN |
| Andrenidae | Perdita snowii | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita speciosa | Timberlake, 1971 | BBSL, SCAN |
| Andrenidae | Perdita sphaeralceae | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita stenopyga | Timberlake, 1964 | BBSL, SCAN |
| Andrenidae | Perdita stottleri | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita subfasciata | Cockerell, 1897 | BBSL, SCAN |
| Andrenidae | Perdita subvestita | Timberlake, 1968 | SCAN |
| Andrenidae | Perdita sycorax | Portman, 2016 | BBSL |
| Andrenidae | Perdita tessellata | Timberlake, 1964 | BBSL, SCAN |
| Andrenidae | Perdita thermophila | Timberlake, 1962 | BBSL, SCAN |
| Andrenidae | Perdita tortifoliae | Cockerell, 1906 | BBSL, SCAN |
| Andrenidae | Perdita triangulifera | Timberlake, 1964 | BBSL, SCAN |
| Andrenidae | Perdita turgiceps | Timberlake, 1954 | BBSL, SCAN |
| Andrenidae | Perdita utahensis | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita ute | Griswold, 1993 | BBSL, SCAN |
| Andrenidae | Perdita verbesinae | Cockerell, 1896 | BBSL, SCAN |
| Andrenidae | Perdita vesca | Timberlake, 1968 | BBSL, SCAN |
| Andrenidae | Perdita vestita | Timberlake, 1958 | BBSL, SCAN |
| Andrenidae | Perdita wilmattae | Cockerell, 1906 | BBSL, SCAN |
| Andrenidae | Perdita wyomingensis | Cockerell, 1922 | BBSL, SCAN |
| Andrenidae | Perdita xanthochroa | Timberlake, 1960 | BBSL, SCAN |
| Andrenidae | Perdita xanthops | Timberlake, 1971 | BBSL |
| Andrenidae | Perdita xerophila | Timberlake, 1962 | BBSL, SCAN |
| Andrenidae | Perdita zebrata | Cresson, 1878 | BBSL, SCAN |
| Andrenidae | Perdita zonalis | Cresson, 1879 | BBSL, SCAN |
| Andrenidae | Protandrena albitarsis | (Cresson, 1872) | BBSL, SCAN |
| Andrenidae | Protandrena aurifodinae | (Michener, 1937) | BBSL, SCAN |
| Andrenidae | Protandrena bakeri | (Cockerell, 1896) | BBSL |
| Andrenidae | Protandrena boylei | (Cockerell, 1896) | BBSL |
| Andrenidae | Protandrena didirupa | (Cockerell, 1908) | BBSL, SCAN |
| Andrenidae | Protandrena flavotincta | (Cockerell, 1898) | BBSL |
| Andrenidae | Protandrena innupta | (Cockerell, 1896) | BBSL |
| Andrenidae | Protandrena irregularis | (Cockerell, 1922) | BBSL, SCAN |
| Andrenidae | Protandrena perlaevis | (Cockerell, 1896) | BBSL |
| Andrenidae | Protandrena renimaculata | (Cockerell, 1896) | BBSL |
| Andrenidae | Protandrena solidaginis | (Robertson, 1893) | SCAN |
| Andrenidae | Pseudopanurgus aethiops | (Cresson, 1872) | BBSL, SCAN |
| Andrenidae | Pseudopanurgus albitarsis | Cresson, 1872 | SCAN |
| Andrenidae | Pseudopanurgus didirupa | (Cockerell, 1908) | SCAN |
| Apidae | Anthophora affabilis | Cresson, 1878 | BBSL, SCAN |
| Apidae | Anthophora albata | Cresson, 1876 | BBSL, SCAN |
| Apidae | Anthophora anasazi | Cresson, 1869 | BBSL |
| Apidae | Anthophora bomboides | Kirby, 1838 | BBSL, SCAN |
| Apidae | Anthophora californica | Cresson, 1869 | BBSL, SCAN |
| Apidae | Anthophora centriformis | Cresson, 1879 | BBSL, SCAN |
| Apidae | Anthophora cinerula | Engel, 2023 | BBSL |
| Apidae | Anthophora cockerelli | Timberlake, 1937 | SCAN |
| Apidae | Anthophora coptognatha | Timberlake, 1951 | BBSL, SCAN |
| Apidae | Anthophora crotchii | Cresson, 1878 | BBSL, SCAN |
| Apidae | Anthophora curta | Provancher, 1895 | BBSL, SCAN |
| Apidae | Anthophora dammersi | Timberlake, 1937 | BBSL, SCAN |
| Apidae | Anthophora edwardsii | Cresson, 1878 | BBSL, SCAN |
| Apidae | Anthophora escalante | Orr, 2017 | BBSL |
| Apidae | Anthophora exigua | Cresson, 1879 | BBSL, SCAN |
| Apidae | Anthophora flexipes | Cresson, 1879 | BBSL, SCAN |
| Apidae | Anthophora hololeuca | Cockerell, 1923 | BBSL, SCAN |
| Apidae | Anthophora lesquerellae | (Cockerell, 1896) | BBSL, SCAN |
| Apidae | Anthophora maculifrons | Cresson, 1879 | BBSL, SCAN |
| Apidae | Anthophora montana | Cresson, 1869 | BBSL, SCAN |
| Apidae | Anthophora neglecta | Timberlake and Cockerell, 1936 | BBSL, SCAN |
| Apidae | Anthophora occidentalis | Cresson, 1869 | BBSL, SCAN |
| Apidae | Anthophora pacifica | Cresson, 1878 | BBSL, SCAN |
| Apidae | Anthophora peritomae | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Anthophora petrophila | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Anthophora platti | Timberlake, 1951 | BBSL |
| Apidae | Anthophora porterae | Cockerell, 1900 | BBSL, SCAN |
| Apidae | Anthophora pueblo | Orr, 2016 | BBSL, SCAN |
| Apidae | Anthophora salazariae | Timberlake, 1937 | SCAN |
| Apidae | Anthophora signata | Brooks, 1988 | BBSL, SCAN |
| Apidae | Anthophora terminalis | Cresson, 1869 | BBSL, SCAN |
| Apidae | Anthophora urbana | Cresson, 1878 | BBSL, SCAN |
| Apidae | Anthophora ursina | Cresson, 1869 | BBSL, SCAN |
| Apidae | Anthophora vannigera | Timberlake, 1951 | BBSL, SCAN |
| Apidae | Anthophorula albata | Cresson, 1876 | BBSL, SCAN |
| Apidae | Anthophorula compactula | Cockerell, 1897 | BBSL, SCAN |
| Apidae | Anthophorula crenulata | (Timberlake, 1980) | BBSL, SCAN |
| Apidae | Anthophorula gutierreziae | (Timberlake, 1947) | BBSL, SCAN |
| Apidae | Anthophorula morgani | Cockerell, 1914 | BBSL, SCAN |
| Apidae | Anthophorula palmarum | (Timberlake, 1947) | BBSL, SCAN |
| Apidae | Apis mellifera | Linnaeus, 1758 | BBSL, SCAN |
| Apidae | Bombus appositus | Cresson, 1878 | BBSL, SCAN |
| Apidae | Bombus ashtoni | (Cresson, 1864) | BBSL, SCAN |
| Apidae | Bombus auricomus | (Robertson, 1903) | BBSL, SCAN |
| Apidae | Bombus bifarius | Cresson, 1878 | BBSL, SCAN |
| Apidae | Bombus bimaculatus | Cresson, 1863 | SCAN |
| Apidae | Bombus borealis | Kirby, 1837 | BBSL, SCAN |
| Apidae | Bombus californicus | Smith, 1854 | BBSL, SCAN |
| Apidae | Bombus centralis | Cresson, 1864 | BBSL, SCAN |
| Apidae | Bombus cockerelli | Franklin, 1913 | BBSL, SCAN |
| Apidae | Bombus crotchii | Cresson, 1878 | BBSL, SCAN |
| Apidae | Bombus fernaldae | (Franklin, 1911) | BBSL, SCAN |
| Apidae | Bombus fervidus | (Fabricius, 1798) | BBSL, SCAN |
| Apidae | Bombus flavidus | Eversmann, 1852 | BBSL, SCAN |
| Apidae | Bombus flavifrons | Cresson, 1863 | BBSL, SCAN |
| Apidae | Bombus griseocollis | (De Geer, 1773) | BBSL, SCAN |
| Apidae | Bombus huntii | Greene, 1860 | BBSL, SCAN |
| Apidae | Bombus impatiens | Cresson, 1863 | SCAN |
| Apidae | Bombus insularis | (Smith, 1861) | BBSL, SCAN |
| Apidae | Bombus kirbiellus | Curtis 1835 | SCAN |
| Apidae | Bombus lapponicus | (Fabricius, 1793) | BBSL, SCAN |
| Apidae | Bombus lucorum | (Linnaeus, 1761) | BBSL, SCAN |
| Apidae | Bombus melanopygus | Nylander, 1848 | BBSL, SCAN |
| Apidae | Bombus mixtus | Cresson, 1878 | BBSL, SCAN |
| Apidae | Bombus morrisoni | Cresson, 1878 | BBSL, SCAN |
| Apidae | Bombus nevadensis | Cresson, 1874 | BBSL, SCAN |
| Apidae | Bombus occidentalis | Greene, 1858 | BBSL, SCAN |
| Apidae | Bombus pensylvanicus | (De Geer, 1773) | BBSL, SCAN |
| Apidae | Bombus rufocinctus | Cresson, 1863 | BBSL, SCAN |
| Apidae | Bombus sitkensis | Nylander, 1848 | BBSL, SCAN |
| Apidae | Bombus sonorus | Say, 1837 | BBSL, SCAN |
| Apidae | Bombus suckleyi | Greene, 1860 | BBSL, SCAN |
| Apidae | Bombus sylvicola | Kirby, 1837 | BBSL, SCAN |
| Apidae | Bombus vancouverensis | Cresson, 1878 | BBSL, SCAN |
| Apidae | Bombus vandykei | (Frison, 1927) | BBSL, SCAN |
| Apidae | Bombus vosnesenskii | Radoszkowski, 1862 | BBSL, SCAN |
| Apidae | Brachymelecta californica | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Brachymelecta interrupta | (Cresson, 1872) | BBSL, SCAN |
| Apidae | Brachymelecta larreae | (Cockerell, 1900) | BBSL |
| Apidae | Centris cockerelli | Fox, 1899 | BBSL, SCAN |
| Apidae | Centris hoffmanseggiae | Cockerell, 1897 | BBSL |
| Apidae | Centris pallida | Fox, 1899 | BBSL, SCAN |
| Apidae | Centris rhodopus | Cockerell, 1897 | BBSL, SCAN |
| Apidae | Ceratina acantha | Provancher, 1895 | BBSL, SCAN |
| Apidae | Ceratina apacheorum | Daly, 1973 | BBSL, SCAN |
| Apidae | Ceratina arizonensis | Cockerell, 1898 | BBSL, SCAN |
| Apidae | Ceratina calcarata | Robertson, 1900 | BBSL |
| Apidae | Ceratina nanula | Cockerell, 1897 | BBSL, SCAN |
| Apidae | Ceratina neomexicana | Cockerell, 1901 | BBSL, SCAN |
| Apidae | Ceratina pacifica | Smith, 1907 | BBSL, SCAN |
| Apidae | Diadasia australis | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Diadasia consociata | Timberlake, 1939 | BBSL, SCAN |
| Apidae | Diadasia diminuta | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Diadasia enavata | (Cresson, 1872) | BBSL, SCAN |
| Apidae | Diadasia lutzi | Cockerell, 1924 | BBSL, SCAN |
| Apidae | Diadasia martialis | Timberlake, 1940 | BBSL, SCAN |
| Apidae | Diadasia nigrifrons | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Diadasia nitidifrons | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Diadasia ochracea | (Cockerell, 1903) | BBSL, SCAN |
| Apidae | Diadasia rinconis | Cockerell, 1897 | BBSL, SCAN |
| Apidae | Diadasia sphaeralcearum | Cockerell, 1905 | BBSL |
| Apidae | Diadasia tropicalis | (Cockerell, 1918) | BBSL, SCAN |
| Apidae | Diadasia vallicola | Timberlake, 1940 | BBSL, SCAN |
| Apidae | Epeolus americanus | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Epeolus compactus | Cresson, 1878 | BBSL, SCAN |
| Apidae | Epeolus interruptus | Robertson, 1900 | BBSL, SCAN |
| Apidae | Epeolus mesillae | (Cockerell, 1895) | BBSL, SCAN |
| Apidae | Epeolus minimus | (Robertson, 1902) | BBSL, SCAN |
| Apidae | Epeolus novomexicanus | Cockerell, 1912 | BBSL |
| Apidae | Epeolus pusillus | Cresson, 1864 | BBSL, SCAN |
| Apidae | Epeolus scutellaris | Say, 1824 | BBSL, SCAN |
| Apidae | Ericrocis lata | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Eucera acerba | (Cresson, 1879) | BBSL, SCAN |
| Apidae | Eucera actuosa | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Eucera albescens | (Timberlake, 1969) | BBSL, SCAN |
| Apidae | Eucera amoena | (Zavortink, 1982) | BBSL, SCAN |
| Apidae | Eucera angustifrons | (Timberlake, 1969) | BBSL, SCAN |
| Apidae | Eucera cordleyi | (Viereck, 1905) | BBSL, SCAN |
| Apidae | Eucera delphinii | (Timberlake, 1969) | BBSL, SCAN |
| Apidae | Eucera douglasiana | (Cockerell, 1906) | BBSL |
| Apidae | Eucera edwardsii | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Eucera frater | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Eucera fulvitarsis | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Eucera lunata | (Timberlake, 1969) | BBSL, SCAN |
| Apidae | Eucera lutziana | (Cockerell, 1933) | BBSL, SCAN |
| Apidae | Eucera mohavensis | (Timberlake, 1969) | BBSL, SCAN |
| Apidae | Eucera phaceliae | (Cockerell, 1911) | BBSL, SCAN |
| Apidae | Eucera primiveris | (Timberlake, 1969) | BBSL, SCAN |
| Apidae | Eucera quadricincta | (Timberlake, 1969) | BBSL, SCAN |
| Apidae | Eucera speciosa | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Eucera territella | (Cockerell, 1905) | BBSL, SCAN |
| Apidae | Eucera tricinctella | (Timberlake, 1969) | BBSL, SCAN |
| Apidae | Eucera virgata | (Cockerell, 1905) | BBSL |
| Apidae | Exomalopsis solidaginis | Cockerell, 1898 | BBSL, SCAN |
| Apidae | Habropoda cineraria | (Smith, 1879) | BBSL, SCAN |
| Apidae | Habropoda excellens | (Timberlake, 1962) | BBSL, SCAN |
| Apidae | Habropoda morrisoni | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Habropoda pallida | (Timberlake, 1937) | BBSL, SCAN |
| Apidae | Habropoda semifulva | (Cockerell, 1905) | SCAN |
| Apidae | Hexepeolus rhodogyne | Linsley and Michener, 1937 | BBSL, SCAN |
| Apidae | Holcopasites arizonicus | (Linsley, 1942) | BBSL, SCAN |
| Apidae | Holcopasites calliopsidis | (Linsley, 1943) | BBSL, SCAN |
| Apidae | Holcopasites pulchellus | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Holcopasites stevensi | Crawford, 1915 | BBSL, SCAN |
| Apidae | Melecta alexanderi | Griswold and Parker, 1999 | BBSL, SCAN |
| Apidae | Melecta bohartorum | Linsley, 1939 | BBSL, SCAN |
| Apidae | Melecta pacifica | Cresson, 1878 | BBSL, SCAN |
| Apidae | Melecta separata | Cresson, 1879 | BBSL, SCAN |
| Apidae | Melecta thoracica | Cresson, 1875 | BBSL, SCAN |
| Apidae | Melissodes ablusus | Cockerell, 1926 | SCAN |
| Apidae | Melissodes agilis | Cresson, 1878 | BBSL, SCAN |
| Apidae | Melissodes appressus | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Melissodes bicoloratus | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Melissodes bimatris | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Melissodes brevipyga | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Melissodes coloradensis | Cresson, 1878 | BBSL, SCAN |
| Apidae | Melissodes communis | Cresson, 1878 | BBSL, SCAN |
| Apidae | Melissodes compositus | Tucker, 1909 | BBSL, SCAN |
| Apidae | Melissodes confusus | Cresson, 1878 | BBSL, SCAN |
| Apidae | Melissodes coreopsis | Robertson, 1905 | BBSL, SCAN |
| Apidae | Melissodes dagosus | Cockerell, 1909 | BBSL, SCAN |
| Apidae | Melissodes denticulatus | Smith, 1854 | BBSL, SCAN |
| Apidae | Melissodes druriellus | (Kirby, 1802) | BBSL, SCAN |
| Apidae | Melissodes fasciatellus | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Melissodes glenwoodensis | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Melissodes grindeliae | Cockerell, 1898 | BBSL, SCAN |
| Apidae | Melissodes humilior | Cockerell, 1903 | BBSL |
| Apidae | Melissodes hymenoxidis | Cockerell, 1906 | BBSL, SCAN |
| Apidae | Melissodes illatus | Lovell and Cockerell, 1906 | BBSL, SCAN |
| Apidae | Melissodes limbus | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Melissodes lupinus | Cresson, 1878 | BBSL, SCAN |
| Apidae | Melissodes lustrus | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Melissodes lutulentus | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Melissodes menuachus | Cresson, 1868 | BBSL, SCAN |
| Apidae | Melissodes metenua | Cockerell, 1924 | BBSL, SCAN |
| Apidae | Melissodes microstictus | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Melissodes montanus | Cresson, 1878 | BBSL, SCAN |
| Apidae | Melissodes pallidisignatus | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Melissodes paroselae | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Melissodes perlusus | Cockerell, 1925 | BBSL, SCAN |
| Apidae | Melissodes perpolitus | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Melissodes relucens | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Melissodes rivalis | Cresson, 1872 | BBSL, SCAN |
| Apidae | Melissodes robustior | Cockerell, 1915 | BBSL, SCAN |
| Apidae | Melissodes saponellus | Cockerell, 1908 | BBSL, SCAN |
| Apidae | Melissodes semilupinus | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Melissodes snowii | Cresson, 1878 | BBSL, SCAN |
| Apidae | Melissodes subagilis | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Melissodes submenuacha | Cockerell, 1897 | BBSL, SCAN |
| Apidae | Melissodes tepidus | Cresson, 1878 | BBSL, SCAN |
| Apidae | Melissodes tristis | Cockerell, 1894 | BBSL, SCAN |
| Apidae | Melissodes utahensis | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Melissodes verbesinarum | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Melissodes vernalis | LaBerge, 1961 | BBSL, SCAN |
| Apidae | Neolarra californica | Michener, 1939 | BBSL, SCAN |
| Apidae | Neolarra cockerelli | (Crawford, 1916) | BBSL, SCAN |
| Apidae | Neolarra penicula | Shanks, 1978 | BBSL, SCAN |
| Apidae | Neolarra pruinosa | Ashmead, 1890 | BBSL, SCAN |
| Apidae | Neolarra ute | Griswold and Parker, 1999 | BBSL, SCAN |
| Apidae | Neolarra verbesinae | (Cockerell, 1895) | BBSL, SCAN |
| Apidae | Neolarra vigilans | (Cockerell, 1895) | BBSL, SCAN |
| Apidae | Neopasites fulviventris | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Nomada accepta | Cresson, 1878 | SCAN |
| Apidae | Nomada adducta | Cresson, 1878 | BBSL, SCAN |
| Apidae | Nomada argentea | (Schwarz, 1966) | BBSL, SCAN |
| Apidae | Nomada articulata | Smith, 1854 | BBSL, SCAN |
| Apidae | Nomada bohartorum | Moalif, 1988 | BBSL, SCAN |
| Apidae | Nomada citrina | Cresson, 1878 | BBSL, SCAN |
| Apidae | Nomada civilis | Cresson, 1878 | BBSL, SCAN |
| Apidae | Nomada collinsiana | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Nomada corvallisensis | Cockerell, 1903 | BBSL, SCAN |
| Apidae | Nomada crawfordi | Cockerell, 1905 | BBSL, SCAN |
| Apidae | Nomada cressonii | Robertson, 1893 | BBSL, SCAN |
| Apidae | Nomada crotchii | Cresson, 1878 | BBSL, SCAN |
| Apidae | Nomada crucis | Cockerell, 1903 | SCAN |
| Apidae | Nomada cymbalariae | Cockerell 1906 | BBSL, SCAN |
| Apidae | Nomada depressa | Cresson, 1863 | BBSL, SCAN |
| Apidae | Nomada edwardsii | Cresson, 1878 | BBSL, SCAN |
| Apidae | Nomada elegantula | Cockerell, 1903 | BBSL, SCAN |
| Apidae | Nomada fragariae | Mitchell, 1962 | BBSL, SCAN |
| Apidae | Nomada fragilis | Cresson, 1878 | SCAN |
| Apidae | Nomada grayi | Cockerell, 1903 | BBSL, SCAN |
| Apidae | Nomada gutierreziae | Cockerell, 1896 | BBSL, SCAN |
| Apidae | Nomada hesperia | Cockerell, 1903 | BBSL, SCAN |
| Apidae | Nomada klamathensis | Fox, 1926 | BBSL, SCAN |
| Apidae | Nomada maculata | Cresson, 1863 | SCAN |
| Apidae | Nomada melanoptera | Cockerell, 1921 | BBSL, SCAN |
| Apidae | Nomada morrisoni | Cresson, 1878 | BBSL, SCAN |
| Apidae | Nomada munda | Cresson, 1878 | BBSL, SCAN |
| Apidae | Nomada mutans | Cockerell, 1910 | BBSL, SCAN |
| Apidae | Nomada obliterata | Cresson, 1863 | SCAN |
| Apidae | Nomada obscurella | Fowler, 1902 | BBSL, SCAN |
| Apidae | Nomada opacella | Timberlake, 1954 | BBSL, SCAN |
| Apidae | Nomada packardiella | Cockerell, 1906 | BBSL, SCAN |
| Apidae | Nomada parata | Cresson, 1878 | BBSL, SCAN |
| Apidae | Nomada parkeri | Evans, 1972 | BBSL, SCAN |
| Apidae | Nomada pecosensis | Cockerell, 1903 | BBSL, SCAN |
| Apidae | Nomada perbella | (Viereck, 1905) | BBSL, SCAN |
| Apidae | Nomada perplexa | Cockerell, 1910 | BBSL, SCAN |
| Apidae | Nomada putnami | Cresson, 1876 | BBSL, SCAN |
| Apidae | Nomada rhodalis | Cockerell, 1903 | BBSL, SCAN |
| Apidae | Nomada rhodomelas | Cockerell, 1903 | BBSL |
| Apidae | Nomada scita | Cresson, 1878 | BBSL, SCAN |
| Apidae | Nomada snowii | Cresson, 1878 | SCAN |
| Apidae | Nomada sophiarum | Cockerell, 1903 | BBSL, SCAN |
| Apidae | Nomada suavis | Cresson, 1878 | BBSL, SCAN |
| Apidae | Nomada texana | Cresson, 1872 | BBSL, SCAN |
| Apidae | Nomada ultima | Cockerell, 1903 | BBSL, SCAN |
| Apidae | Nomada utahensis | Moalif, 1988 | BBSL, SCAN |
| Apidae | Nomada valida | Smith, 1854 | BBSL, SCAN |
| Apidae | Nomada vegana | Cockerell, 1903 | BBSL, SCAN |
| Apidae | Nomada verecunda | Cresson, 1879 | BBSL, SCAN |
| Apidae | Nomada vicinalis | Cresson, 1878 | BBSL, SCAN |
| Apidae | Nomada vierecki | Cockerell, 1903 | SCAN |
| Apidae | Oreopasites arizonica | Linsley, 1941 | SCAN |
| Apidae | Oreopasites scituli | Cockerell, 1906 | BBSL, SCAN |
| Apidae | Oreopasites vanduzeei | Cockerell, 1925 | BBSL, SCAN |
| Apidae | Protohalonia amoena | (Zavortink, 1982) | BBSL, SCAN |
| Apidae | Svastra atripes | Cresson, 1872 | BBSL, SCAN |
| Apidae | Svastra compta | Cresson, 1878 | BBSL, SCAN |
| Apidae | Svastra helianthelli | (Cockerell, 1905) | BBSL, SCAN |
| Apidae | Svastra machaerantherae | (Cockerell, 1904) | BBSL, SCAN |
| Apidae | Svastra obliqua | Say, 1837 | BBSL, SCAN |
| Apidae | Townsendiella pulchra | Crawford, 1916 | BBSL, SCAN |
| Apidae | Triepeolus balteatus | Cockerell, 1921 | BBSL, SCAN |
| Apidae | Triepeolus concavus | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Triepeolus cressonii | (Robertson, 1897) | BBSL |
| Apidae | Triepeolus dacotensis | (Stevens, 1919) | BBSL, SCAN |
| Apidae | Triepeolus denverensis | Cockerell, 1910 | BBSL, SCAN |
| Apidae | Triepeolus diffusus | Rightmyer, 2008 | SCAN |
| Apidae | Triepeolus distinctus | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Triepeolus diversipes | Cockerell, 1924 | BBSL, SCAN |
| Apidae | Triepeolus eldoradensis | (Cockerell, 1910) | BBSL, SCAN |
| Apidae | Triepeolus fraserae | Cockerell, 1904 | SCAN |
| Apidae | Triepeolus grindeliae | Cockerell, 1907 | BBSL, SCAN |
| Apidae | Triepeolus helianthi | (Robertson, 1897) | BBSL, SCAN |
| Apidae | Triepeolus lunatus | (Say, 1824) | SCAN |
| Apidae | Triepeolus martini | (Cockerell, 1900) | BBSL, SCAN |
| Apidae | Triepeolus micropygius | Robertson, 1903 | BBSL, SCAN |
| Apidae | Triepeolus norae | Cockerell, 1907 | BBSL, SCAN |
| Apidae | Triepeolus paenepectoralis | Viereck, 1905 | SCAN |
| Apidae | Triepeolus perpictus | Rightmyer, 2008 | BBSL, SCAN |
| Apidae | Triepeolus rhododontus | Cockerell, 1921 | SCAN |
| Apidae | Triepeolus sarothrinus | (Cockerell, 1929) | BBSL, SCAN |
| Apidae | Triepeolus segregatus | (Cockerell, 1900) | BBSL, SCAN |
| Apidae | Triepeolus subalpinus | Cockerell, 1910 | BBSL, SCAN |
| Apidae | Triepeolus subnitens | Cockerell and Timberlake, 1929 | BBSL, SCAN |
| Apidae | Triepeolus tanneri | Cockerell, 1928 | SCAN |
| Apidae | Triepeolus texanus | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Triepeolus timberlakei | Cockerell, 1929 | BBSL, SCAN |
| Apidae | Triepeolus utahensis | (Cockerell, 1921) | SCAN |
| Apidae | Triopasites penniger | (Cockerell, 1894) | BBSL, SCAN |
| Apidae | Xenoglossa (Peponapis) pruinosa | (Say, 1837) | BBSL, SCAN |
| Apidae | Xenoglossa strenua | (Cresson, 1878) | BBSL, SCAN |
| Apidae | Xenoglossodes eriocarpi | (Cockerell, 1898) | BBSL, SCAN |
| Apidae | Xenoglossodes perconcinnus | (Cockerell, 1949) | BBSL |
| Apidae | Xylocopa californica | Cresson, 1864 | BBSL, SCAN |
| Apidae | Xylocopa sonorina | Smith, 1874 | BBSL, SCAN |
| Apidae | Xylocopa tabaniformis | Smith, 1854 | BBSL, SCAN |
| Apidae | Xylocopa virginica | (Linnaeus, 1771) | SCAN |
| Apidae | Zacosmia maculata | (Cresson, 1879) | BBSL |
| Colletidae | Caupolicana yarrowi | (Cresson, 1875) | BBSL |
| Colletidae | Colletes albescens | Cresson, 1868 | BBSL |
| Colletidae | Colletes annae | Cockerell, 1897 | BBSL, SCAN |
| Colletidae | Colletes ciliatoides | Stephen, 1954 | BBSL, SCAN |
| Colletidae | Colletes clypeonitens | Swenk, 1906 | BBSL, SCAN |
| Colletidae | Colletes compactus | Cresson, 1868 | BBSL, SCAN |
| Colletidae | Colletes consors | Cresson, 1868 | BBSL, SCAN |
| Colletidae | Colletes covilleae | Timberlake, 1951 | BBSL, SCAN |
| Colletidae | Colletes daleae | Cockerell, 1897 | BBSL, SCAN |
| Colletidae | Colletes eulophi | Robertson, 1891 | BBSL, SCAN |
| Colletidae | Colletes fulgidus | Swenk, 1904 | BBSL, SCAN |
| Colletidae | Colletes gypsicolens | Cockerell, 1897 | BBSL, SCAN |
| Colletidae | Colletes kincaidii | Cockerell, 1898 | BBSL, SCAN |
| Colletidae | Colletes larreae | Timberlake, 1951 | BBSL, SCAN |
| Colletidae | Colletes laticinctus | Timberlake, 1951 | BBSL, SCAN |
| Colletidae | Colletes lineatus | Metz, 1910 | BBSL, SCAN |
| Colletidae | Colletes louisae | Cockerell, 1897 | BBSL, SCAN |
| Colletidae | Colletes lutzi | Timberlake, 1943 | BBSL, SCAN |
| Colletidae | Colletes mandibularis | Smith, 1853 | BBSL, SCAN |
| Colletidae | Colletes nigrifrons | Titus, 1900 | BBSL, SCAN |
| Colletidae | Colletes paniscus | Viereck, 1903 | BBSL, SCAN |
| Colletidae | Colletes petalostemonis | Swenk, 1906 | BBSL, SCAN |
| Colletidae | Colletes phaceliae | Cockerell, 1906 | BBSL, SCAN |
| Colletidae | Colletes robertsonii | Dalla Torre, 1896 | BBSL |
| Colletidae | Colletes salicicola | Cockerell, 1897 | BBSL, SCAN |
| Colletidae | Colletes simulans | Cresson, 1868 | BBSL, SCAN |
| Colletidae | Colletes skinneri | Viereck, 1903 | BBSL, SCAN |
| Colletidae | Colletes slevini | Cockerell, 1925 | BBSL, SCAN |
| Colletidae | Colletes sphaeralceae | Timberlake, 1951 | BBSL, SCAN |
| Colletidae | Colletes willistoni | Robertson, 1891 | BBSL, SCAN |
| Colletidae | Colletes wootoni | Cockerell, 1897 | BBSL, SCAN |
| Colletidae | Colletes xerophilus | Timberlake, 1951 | BBSL, SCAN |
| Colletidae | Hylaeus affinis | (Smith, 1853) | BBSL, SCAN |
| Colletidae | Hylaeus annulatus | (Linnaeus, 1758) | BBSL, SCAN |
| Colletidae | Hylaeus asininus | (Cockerell and Casad, 1895) | BBSL, SCAN |
| Colletidae | Hylaeus basalis | (Smith, 1853) | BBSL, SCAN |
| Colletidae | Hylaeus coloradensis | (Cockerell, 1896) | BBSL, SCAN |
| Colletidae | Hylaeus conspicuus | (Metz, 1911) | BBSL, SCAN |
| Colletidae | Hylaeus cookii | (Metz, 1911) | BBSL |
| Colletidae | Hylaeus episcopalis | (Cockerell, 1896) | BBSL, SCAN |
| Colletidae | Hylaeus granulatus | (Metz, 1911) | BBSL, SCAN |
| Colletidae | Hylaeus hurdi | Snelling, 1966 | BBSL, SCAN |
| Colletidae | Hylaeus leptocephalus | (Morawitz, 1871) | BBSL, SCAN |
| Colletidae | Hylaeus megalotis | (Swenk and Cockerell, 1910) | BBSL, SCAN |
| Colletidae | Hylaeus mesillae | (Cockerell, 1896) | BBSL, SCAN |
| Colletidae | Hylaeus modestus | Say, 1837 | BBSL, SCAN |
| Colletidae | Hylaeus personatellus | (Cockerell, 1915) | BBSL, SCAN |
| Colletidae | Hylaeus punctatus | (Brullé, 1832) | SCAN |
| Colletidae | Hylaeus rudbeckiae | (Cockerell and Casad, 1895) | BBSL, SCAN |
| Colletidae | Hylaeus sejunctus | Snelling, 1970 | BBSL, SCAN |
| Colletidae | Hylaeus sonorensis | Cockerell, 1924 | BBSL, SCAN |
| Colletidae | Hylaeus tuertonis | (Cockerell, 1906) | SCAN |
| Colletidae | Hylaeus verticalis | (Cresson, 1869) | BBSL, SCAN |
| Colletidae | Hylaeus wootoni | (Cockerell, 1896) | BBSL, SCAN |
| Halictidae | Agapostemon angelicus | Cockerell, 1924 | BBSL, SCAN |
| Halictidae | Agapostemon coloradinus | (Vachal, 1903) | BBSL, SCAN |
| Halictidae | Agapostemon femoratus | Crawford, 1901 | BBSL, SCAN |
| Halictidae | Agapostemon melliventris | Cresson, 1874 | BBSL, SCAN |
| Halictidae | Agapostemon obliquus | (Kirby, 1802) | BBSL, SCAN |
| Halictidae | Agapostemon sericeus | (Forster, 1771) | BBSL, SCAN |
| Halictidae | Agapostemon splendens | (Lepeletier 1841) | BBSL, SCAN |
| Halictidae | Agapostemon texanus | Cresson, 1872 | BBSL, SCAN |
| Halictidae | Agapostemon virescens | (Fabricius, 1775) | BBSL, SCAN |
| Halictidae | Augochlora pura | (Say, 1837) | BBSL, SCAN |
| Halictidae | Augochlorella pomoniella | (Cockerell, 1915) | BBSL, SCAN |
| Halictidae | Conanthalictus minor | Timberlake, 1961 | BBSL, SCAN |
| Halictidae | Dieunomia heteropoda | (Say, 1824) | BBSL, SCAN |
| Halictidae | Dieunomia nevadensis | (Cresson, 1874) | BBSL, SCAN |
| Halictidae | Dieunomia triangulifera | (Vachal, 1897) | BBSL, SCAN |
| Halictidae | Dufourea contarovici | Bohart, 1980 | BBSL |
| Halictidae | Dufourea fimbriata | (Cresson, 1878) | BBSL, SCAN |
| Halictidae | Dufourea harveyi | (Cockerell, 1906) | BBSL |
| Halictidae | Dufourea longiceps | Bohart, 1948 | BBSL, SCAN |
| Halictidae | Dufourea malacothricis | Timberlake, 1939 | BBSL, SCAN |
| Halictidae | Dufourea marginata | (Cresson, 1878) | BBSL, SCAN |
| Halictidae | Dufourea mulleri | (Cockerell, 1898) | BBSL |
| Halictidae | Dufourea orovada | Bohart, 1980 | BBSL |
| Halictidae | Dufourea sandhouseae | (Michener, 1937) | BBSL, SCAN |
| Halictidae | Dufourea scabricornis | Bohart, 1949 | BBSL, SCAN |
| Halictidae | Dufourea subdavidsoni | Bohart, 1949 | BBSL, SCAN |
| Halictidae | Dufourea tinsleyi | (Cockerell, 1898) | BBSL, SCAN |
| Halictidae | Dufourea trochantera | Bohart, 1948 | BBSL, SCAN |
| Halictidae | Dufourea vandykei | Bohart, 1948 | BBSL |
| Halictidae | Halictus confusus | Smith, 1853 | BBSL |
| Halictidae | Halictus farinosus | Smith, 1853 | BBSL, SCAN |
| Halictidae | Halictus ligatus | Say, 1837 | BBSL, SCAN |
| Halictidae | Halictus parallelus | Say, 1837 | BBSL, SCAN |
| Halictidae | Halictus rubicundus | (Christ, 1791) | BBSL, SCAN |
| Halictidae | Halictus tripartitus | Cockerell, 1895 | BBSL, SCAN |
| Halictidae | Halictus virgatellus | Cockerell, 1901 | BBSL, SCAN |
| Halictidae | Lasioglossum aberrans | (Crawford, 1903) | BBSL |
| Halictidae | Lasioglossum abundipunctum | Gibbs, 2010 | BBSL |
| Halictidae | Lasioglossum albipenne | (Robertson, 1890) | BBSL |
| Halictidae | Lasioglossum albohirtum | (Crawford, 1907) | BBSL, SCAN |
| Halictidae | Lasioglossum albuquerquense | (Michener, 1937) | BBSL, SCAN |
| Halictidae | Lasioglossum aliud | (Sandhouse, 1924) | BBSL, SCAN |
| Halictidae | Lasioglossum amicum | (Cockerell, 1897) | SCAN |
| Halictidae | Lasioglossum anhypops | McGinley, 1986 | BBSL, SCAN |
| Halictidae | Lasioglossum arcanum | (Sandhouse, 1924) | SCAN |
| Halictidae | Lasioglossum argemonis | (Cockerell, 1897) | BBSL, SCAN |
| Halictidae | Lasioglossum athabascense | (Sandhouse, 1933) | BBSL, SCAN |
| Halictidae | Lasioglossum brunneiventre | (Crawford, 1907) | BBSL, SCAN |
| Halictidae | Lasioglossum caducum | (Sandhouse, 1924) | BBSL, SCAN |
| Halictidae | Lasioglossum clarissimum | (Ellis, 1914) | BBSL, SCAN |
| Halictidae | Lasioglossum clematisellum | (Cockerell, 1904) | BBSL, SCAN |
| Halictidae | Lasioglossum colatum | (Vachal, 1904) | BBSL, SCAN |
| Halictidae | Lasioglossum comulum | Michener, 1951 | BBSL, SCAN |
| Halictidae | Lasioglossum cooleyi | (Crawford, 1906) | BBSL, SCAN |
| Halictidae | Lasioglossum cordleyi | (Crawford, 1906) | SCAN |
| Halictidae | Lasioglossum cressonii | (Robertson, 1890) | SCAN |
| Halictidae | Lasioglossum deludens | Gardner and Gibbs, 2023 | BBSL |
| Halictidae | Lasioglossum desertum | (Smith, 1879) | BBSL, SCAN |
| Halictidae | Lasioglossum diatretum | (Vachal, 1904) | BBSL, SCAN |
| Halictidae | Lasioglossum diversopunctatum | (Ellis, 1914) | BBSL, SCAN |
| Halictidae | Lasioglossum ebmerellum | Gibbs, 2010 | BBSL |
| Halictidae | Lasioglossum egregium | (Vachal, 1904) | BBSL, SCAN |
| Halictidae | Lasioglossum eophilus | (Ellis, 1914) | BBSL, SCAN |
| Halictidae | Lasioglossum foxii | (Robertson, 1895) | BBSL, SCAN |
| Halictidae | Lasioglossum giffardi | (Michener, 1937) | SCAN |
| Halictidae | Lasioglossum glabriventre | (Crawford, 1907) | BBSL, SCAN |
| Halictidae | Lasioglossum grinnelli | (Cockerell, 1916) | SCAN |
| Halictidae | Lasioglossum griswoldi | Gibbs, 2009 | BBSL |
| Halictidae | Lasioglossum heterorhinum | (Cockerell, 1930) | BBSL |
| Halictidae | Lasioglossum heterorhinus | (Cockerell, 1930) | SCAN |
| Halictidae | Lasioglossum hudsoniellum | (Cockerell, 1919) | BBSL, SCAN |
| Halictidae | Lasioglossum hunteri | (Crawford, 1932) | BBSL, SCAN |
| Halictidae | Lasioglossum hyalinum | (Crawford, 1907) | BBSL, SCAN |
| Halictidae | Lasioglossum impavidum | (Sandhouse, 1924) | BBSL, SCAN |
| Halictidae | Lasioglossum incompletum | (Crawford, 1907) | BBSL, SCAN |
| Halictidae | Lasioglossum inconditum | (Cockerell, 1916) | BBSL, SCAN |
| Halictidae | Lasioglossum jubatum | (Vachal, 1904) | BBSL, SCAN |
| Halictidae | Lasioglossum kincaidii | (Cockerell, 1898) | BBSL, SCAN |
| Halictidae | Lasioglossum kunzei | (Cockerell, 1898) | BBSL |
| Halictidae | Lasioglossum laevissimum | (Smith, 1853) | SCAN |
| Halictidae | Lasioglossum lampronotum | (Cameron, 1905) | BBSL, SCAN |
| Halictidae | Lasioglossum leucozonium | (Schrank, 1781) | BBSL, SCAN |
| Halictidae | Lasioglossum longicorne | (Crawford, 1907) | BBSL, SCAN |
| Halictidae | Lasioglossum lusorium | (Cresson, 1872) | BBSL, SCAN |
| Halictidae | Lasioglossum macroprosopum | Gibbs, 2010 | BBSL |
| Halictidae | Lasioglossum mellipes | (Crawford, 1907) | BBSL, SCAN |
| Halictidae | Lasioglossum microlepoides | (Ellis, 1914) | BBSL, SCAN |
| Halictidae | Lasioglossum nevadense | (Crawford, 1907) | BBSL, SCAN |
| Halictidae | Lasioglossum nigrescens | (Crawford, 1907) | BBSL, SCAN |
| Halictidae | Lasioglossum nigrum | (Viereck, 1903) | BBSL, SCAN |
| Halictidae | Lasioglossum noctivaga | Linsley and MacSwain, 1962 | BBSL, SCAN |
| Halictidae | Lasioglossum obnubilum | (Sandhouse, 1924) | BBSL, SCAN |
| Halictidae | Lasioglossum occidentale | (Crawford, 1902) | BBSL, SCAN |
| Halictidae | Lasioglossum orthocarpi | (Cockerell, 1936) | SCAN |
| Halictidae | Lasioglossum ovaliceps | (Cockerell, 1898) | BBSL, SCAN |
| Halictidae | Lasioglossum pacatum | (Sandhouse, 1924) | BBSL, SCAN |
| Halictidae | Lasioglossum packeri | Gibbs, 2010 | BBSL |
| Halictidae | Lasioglossum pallidellum | (Ellis, 1914) | BBSL, SCAN |
| Halictidae | Lasioglossum paraforbesii | McGinley, 1986 | BBSL, SCAN |
| Halictidae | Lasioglossum pavoninum | (Ellis, 1913) | BBSL, SCAN |
| Halictidae | Lasioglossum pectoraloides | (Cockerell, 1895) | BBSL, SCAN |
| Halictidae | Lasioglossum perdifficile | (Cockerell, 1895) | BBSL, SCAN |
| Halictidae | Lasioglossum perparvum | (Ellis, 1914) | BBSL, SCAN |
| Halictidae | Lasioglossum petrellum | (Cockerell, 1903) | BBSL, SCAN |
| Halictidae | Lasioglossum prasinogaster | Gibbs, 2010 | BBSL, SCAN |
| Halictidae | Lasioglossum pruinosiforme | (Crawford, 1906) | BBSL, SCAN |
| Halictidae | Lasioglossum pruinosum | (Robertson, 1892) | BBSL, SCAN |
| Halictidae | Lasioglossum pullilabris | (Vachal, 1904) | SCAN |
| Halictidae | Lasioglossum pulveris | (Cockerell, 1930) | BBSL, SCAN |
| Halictidae | Lasioglossum punctatoventre | (Crawford, 1907) | BBSL, SCAN |
| Halictidae | Lasioglossum ruficorne | (Crawford, 1907) | SCAN |
| Halictidae | Lasioglossum ruidosense | (Cockerell, 1897) | BBSL, SCAN |
| Halictidae | Lasioglossum rupticristum | McGinley, 1986 | SCAN |
| Halictidae | Lasioglossum sedi | (Sandhouse, 1924) | BBSL, SCAN |
| Halictidae | Lasioglossum semibrunneum | (Cockerell, 1895) | BBSL, SCAN |
| Halictidae | Lasioglossum semicaeruleum | (Cockerell, 1895) | BBSL, SCAN |
| Halictidae | Lasioglossum sisymbrii | (Cockerell, 1895) | BBSL, SCAN |
| Halictidae | Lasioglossum sitocleptum | Gibbs, 2010 | BBSL |
| Halictidae | Lasioglossum swenki | (Crawford, 1906) | BBSL |
| Halictidae | Lasioglossum synthyridis | (Cockerell, 1906) | SCAN |
| Halictidae | Lasioglossum tegulare | (Robertson, 1890) | BBSL, SCAN |
| Halictidae | Lasioglossum tegulariforme | (Crawford, 1907) | BBSL, SCAN |
| Halictidae | Lasioglossum tenax | (Sandhouse, 1924) | BBSL |
| Halictidae | Lasioglossum titusi | (Crawford, 1902) | BBSL, SCAN |
| Halictidae | Lasioglossum trizonatum | (Cresson, 1874) | BBSL, SCAN |
| Halictidae | Lasioglossum versatum | (Robertson, 1902) | BBSL, SCAN |
| Halictidae | Lasioglossum zephyrum | (Smith, 1853) | BBSL, SCAN |
| Halictidae | Nomia foxii | Dalla Torre, 1896 | SCAN |
| Halictidae | Nomia howardi | Crawford, 1911 | BBSL |
| Halictidae | Nomia melanderi | Cockerell, 1906 | BBSL, SCAN |
| Halictidae | Nomia tetrazonata | Cockerell, 1910 | BBSL, SCAN |
| Halictidae | Sphecodes arvensiformis | Cockerell, 1904 | BBSL, SCAN |
| Halictidae | Sphecodes minor | Robertson, 1898 | SCAN |
| Halictidae | Sphecodes patruelis | Cockerell, 1913 | BBSL, SCAN |
| Halictidae | Sphecodes pecosensis | Cockerell, 1904 | SCAN |
| Megachilidae | Anthidiellum ehrhorni | (Cockerell, 1900) | BBSL |
| Megachilidae | Anthidiellum robertsoni | (Cockerell, 1904) | BBSL |
| Megachilidae | Anthidium atrifrons | Cresson, 1868 | BBSL, SCAN |
| Megachilidae | Anthidium atripes | Cresson, 1879 | BBSL |
| Megachilidae | Anthidium atripoides | Gonzalez and Griswold, 2013 | BBSL |
| Megachilidae | Anthidium banningense | Cockerell, 1904 | BBSL, SCAN |
| Megachilidae | Anthidium clypeodentatum | Swenk, 1914 | BBSL |
| Megachilidae | Anthidium cockerelli | Schwarz, 1928 | BBSL |
| Megachilidae | Anthidium dammersi | Cockerell, 1937 | BBSL, SCAN |
| Megachilidae | Anthidium duomarginatum | Gonzalez and Griswold, 2013 | BBSL |
| Megachilidae | Anthidium edwardsii | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Anthidium emarginatum | (Say, 1824) | BBSL, SCAN |
| Megachilidae | Anthidium formosum | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Anthidium illustre | Cresson, 1879 | BBSL, SCAN |
| Megachilidae | Anthidium maculosum | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Anthidium manicatum | (Linnaeus, 1758) | BBSL, SCAN |
| Megachilidae | Anthidium mormonum | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Anthidium oblongatum | (Illiger, 1806) | BBSL, SCAN |
| Megachilidae | Anthidium palmarum | Cockerell, 1904 | BBSL |
| Megachilidae | Anthidium paroselae | Cockerell, 1898 | BBSL |
| Megachilidae | Anthidium placitum | Cresson, 1879 | BBSL, SCAN |
| Megachilidae | Anthidium porterae | Cockerell, 1900 | BBSL |
| Megachilidae | Anthidium rodecki | Schwarz, 1934 | BBSL, SCAN |
| Megachilidae | Anthidium schwarzi | Gonzalez and Griswold, 2013 | BBSL |
| Megachilidae | Anthidium tenuiflorae | Cockerell, 1907 | BBSL, SCAN |
| Megachilidae | Anthidium utahense | Swenk, 1914 | BBSL, SCAN |
| Megachilidae | Ashmeadiella aridula | Cockerell, 1910 | BBSL, SCAN |
| Megachilidae | Ashmeadiella australis | (Cockerell, 1902) | BBSL, SCAN |
| Megachilidae | Ashmeadiella bigeloviae | (Cockerell, 1897) | BBSL, SCAN |
| Megachilidae | Ashmeadiella breviceps | Michener, 1939 | BBSL, SCAN |
| Megachilidae | Ashmeadiella bucconis | (Say, 1837) | BBSL, SCAN |
| Megachilidae | Ashmeadiella cactorum | (Cockerell, 1897) | BBSL, SCAN |
| Megachilidae | Ashmeadiella californica | (Ashmead, 1897) | BBSL, SCAN |
| Megachilidae | Ashmeadiella cazieri | Michener, 1939 | BBSL, SCAN |
| Megachilidae | Ashmeadiella cubiceps | (Cresson, 1879) | BBSL, SCAN |
| Megachilidae | Ashmeadiella difugita | Michener, 1939 | BBSL, SCAN |
| Megachilidae | Ashmeadiella erema | Michener, 1939 | BBSL, SCAN |
| Megachilidae | Ashmeadiella femorata | (Michener, 1936) | BBSL, SCAN |
| Megachilidae | Ashmeadiella foveata | Michener, 1939 | BBSL, SCAN |
| Megachilidae | Ashmeadiella gillettei | Titus, 1904 | BBSL, SCAN |
| Megachilidae | Ashmeadiella holtii | Cockerell, 1898 | BBSL, SCAN |
| Megachilidae | Ashmeadiella hurdiana | (Michener, 1954) | BBSL, SCAN |
| Megachilidae | Ashmeadiella leucozona | Cockerell, 1924 | BBSL, SCAN |
| Megachilidae | Ashmeadiella lutzi | (Cockerell, 1930) | BBSL, SCAN |
| Megachilidae | Ashmeadiella meliloti | (Cockerell, 1897) | BBSL, SCAN |
| Megachilidae | Ashmeadiella micheneri | Snelling, 1962 | BBSL |
| Megachilidae | Ashmeadiella neomexicana | (Cockerell, 1904) | SCAN |
| Megachilidae | Ashmeadiella occipitalis | Michener, 1939 | BBSL, SCAN |
| Megachilidae | Ashmeadiella opuntiae | (Cockerell, 1897) | BBSL, SCAN |
| Megachilidae | Ashmeadiella pronitens | (Cockerell, 1906) | BBSL, SCAN |
| Megachilidae | Ashmeadiella prosopidis | (Cockerell, 1897) | BBSL |
| Megachilidae | Ashmeadiella rhodognatha | Cockerell, 1924 | BBSL, SCAN |
| Megachilidae | Ashmeadiella rufipes | Titus, 1904 | BBSL, SCAN |
| Megachilidae | Ashmeadiella sonora | Michener, 1939 | BBSL, SCAN |
| Megachilidae | Ashmeadiella stenognatha | Michener, 1939 | BBSL, SCAN |
| Megachilidae | Ashmeadiella titusi | Michener, 1939 | BBSL, SCAN |
| Megachilidae | Ashmeadiella vandykiella | Michener, 1949 | BBSL, SCAN |
| Megachilidae | Ashmeadiella xenomastax | Michener, 1939 | BBSL, SCAN |
| Megachilidae | Atoposmia abjecta | (Cresson, 1878) | BBSL, SCAN |
| Megachilidae | Atoposmia anthodyta | (Michener, 1943) | BBSL, SCAN |
| Megachilidae | Atoposmia copelandica | (Cockerell, 1908) | BBSL, SCAN |
| Megachilidae | Atoposmia daleae | (Michener, 1951) | BBSL, SCAN |
| Megachilidae | Atoposmia elongata | (Michener, 1936) | BBSL, SCAN |
| Megachilidae | Atoposmia enceliae | (Cockerell, 1935) | BBSL, SCAN |
| Megachilidae | Atoposmia hypostomalis | (Michener, 1949) | BBSL, SCAN |
| Megachilidae | Atoposmia nitidivitta | (Michener, 1943) | BBSL, SCAN |
| Megachilidae | Atoposmia pycnognatha | (Michener, 1943) | BBSL, SCAN |
| Megachilidae | Atoposmia triodonta | (Cockerell, 1935) | BBSL |
| Megachilidae | Chelostoma californicum | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Chelostoma cockerelli | Michener, 1938 | BBSL |
| Megachilidae | Chelostoma minutum | Crawford, 1916 | BBSL, SCAN |
| Megachilidae | Coelioxys alternatus | Say, 1837 | BBSL, SCAN |
| Megachilidae | Coelioxys apacheorum | Cockerell, 1900 | BBSL, SCAN |
| Megachilidae | Coelioxys banksi | Crawford, 1914 | BBSL, SCAN |
| Megachilidae | Coelioxys edita | Cresson, 1872 | BBSL, SCAN |
| Megachilidae | Coelioxys erysimi | Cockerell, 1912 | BBSL, SCAN |
| Megachilidae | Coelioxys funeraria | Smith, 1854 | BBSL, SCAN |
| Megachilidae | Coelioxys gilensis | Cockerell, 1898 | BBSL, SCAN |
| Megachilidae | Coelioxys grindeliae | Cockerell, 1900 | BBSL, SCAN |
| Megachilidae | Coelioxys hirsutissima | Cockerell, 1912 | BBSL, SCAN |
| Megachilidae | Coelioxys hunteri | Crawford, 1914 | BBSL, SCAN |
| Megachilidae | Coelioxys insita | Cresson, 1872 | BBSL |
| Megachilidae | Coelioxys mesae | Cockerell, 1921 | BBSL, SCAN |
| Megachilidae | Coelioxys mitchelli | Baker, 1975 | BBSL, SCAN |
| Megachilidae | Coelioxys moesta | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Coelioxys novomexicana | Cockerell, 1909 | BBSL, SCAN |
| Megachilidae | Coelioxys octodentata | Say, 1824 | BBSL, SCAN |
| Megachilidae | Coelioxys porterae | Cockerell, 1900 | BBSL, SCAN |
| Megachilidae | Coelioxys producta | Cresson, 1865 | SCAN |
| Megachilidae | Coelioxys rufitarsis | Smith, 1854 | BBSL, SCAN |
| Megachilidae | Coelioxys salinarius | Cockerell, 1925 | BBSL, SCAN |
| Megachilidae | Coelioxys sayi | Robertson, 1897 | BBSL, SCAN |
| Megachilidae | Coelioxys sodalis | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Coelioxys texana | Cresson, 1872 | BBSL, SCAN |
| Megachilidae | Dianthidium arizonicum | Rohwer, 1916 | BBSL |
| Megachilidae | Dianthidium concinnum | (Cresson, 1872) | BBSL |
| Megachilidae | Dianthidium cressonii | (Dalla Torre, 1896) | BBSL, SCAN |
| Megachilidae | Dianthidium curvatum | (Smith, 1854) | BBSL, SCAN |
| Megachilidae | Dianthidium desertorum | Timberlake, 1943 | SCAN |
| Megachilidae | Dianthidium dubium | Schwarz, 1928 | BBSL, SCAN |
| Megachilidae | Dianthidium heterulkei | Schwarz, 1940 | BBSL, SCAN |
| Megachilidae | Dianthidium implicatum | Timberlake, 1948 | BBSL, SCAN |
| Megachilidae | Dianthidium parvum | (Cresson, 1878) | BBSL, SCAN |
| Megachilidae | Dianthidium platyurum | Cockerell, 1923 | BBSL, SCAN |
| Megachilidae | Dianthidium pudicum | (Cresson, 1879) | BBSL, SCAN |
| Megachilidae | Dianthidium singulare | (Cresson, 1879) | BBSL, SCAN |
| Megachilidae | Dianthidium subparvum | Swenk, 1914 | BBSL, SCAN |
| Megachilidae | Dianthidium ulkei | (Cresson, 1878) | BBSL, SCAN |
| Megachilidae | Dioxys aurifusca | (Titus, 1901) | BBSL, SCAN |
| Megachilidae | Dioxys aurifuscus | (Titus, 1901) | SCAN |
| Megachilidae | Dioxys pacificus | Cockerell, 1916 | BBSL, SCAN |
| Megachilidae | Dioxys pomonae | Cockerell, 1910 | BBSL, SCAN |
| Megachilidae | Dioxys productus | (Cresson, 1879) | BBSL, SCAN |
| Megachilidae | Heriades carinatus | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Heriades cressoni | Michener, 1938 | BBSL |
| Megachilidae | Heriades micropthalma | Michener, 1954 | BBSL, SCAN |
| Megachilidae | Heriades occidentalis | Michener, 1938 | BBSL, SCAN |
| Megachilidae | Heriades texanus | Michener, 1938 | BBSL, SCAN |
| Megachilidae | Heriades timberlakei | Michener, 1938 | BBSL, SCAN |
| Megachilidae | Heriades variolosus | (Cresson, 1872) | BBSL, SCAN |
| Megachilidae | Hoplitis albifrons | (Kirby, 1837) | BBSL, SCAN |
| Megachilidae | Hoplitis biscutellae | (Cockerell, 1897) | BBSL, SCAN |
| Megachilidae | Hoplitis colei | (Crawford, 1916) | BBSL, SCAN |
| Megachilidae | Hoplitis elongaticeps | Michener, 1947 | BBSL, SCAN |
| Megachilidae | Hoplitis fulgida | (Cresson, 1864) | BBSL, SCAN |
| Megachilidae | Hoplitis grinnelli | (Cockerell, 1910) | BBSL, SCAN |
| Megachilidae | Hoplitis hypocrita | (Cockerell, 1906) | BBSL, SCAN |
| Megachilidae | Hoplitis incanescens | (Cockerell, 1922) | BBSL, SCAN |
| Megachilidae | Hoplitis linsdalei | Michener, 1947 | BBSL |
| Megachilidae | Hoplitis louisae | (Cockerell, 1934) | BBSL |
| Megachilidae | Hoplitis mojavensis | Michener, 1947 | BBSL, SCAN |
| Megachilidae | Hoplitis paiute | (Griswold, 1983) | BBSL, SCAN |
| Megachilidae | Hoplitis paroselae | Michener, 1947 | BBSL, SCAN |
| Megachilidae | Hoplitis plagiostoma | Michener, 1947 | BBSL, SCAN |
| Megachilidae | Hoplitis producta | (Cresson, 1864) | BBSL, SCAN |
| Megachilidae | Hoplitis robusta | (Nylander, 1848) | BBSL, SCAN |
| Megachilidae | Hoplitis sambuci | Titus, 1904 | BBSL, SCAN |
| Megachilidae | Hoplitis truncata | (Cresson, 1878) | BBSL, SCAN |
| Megachilidae | Hoplitis uvulalis | (Cockerell, 1902) | BBSL, SCAN |
| Megachilidae | Hoplitis xerophila | (Cockerell, 1935) | BBSL, SCAN |
| Megachilidae | Hoplitis zuni | (Parker, 1977) | BBSL, SCAN |
| Megachilidae | Lithurgopsis apicalis | (Cresson, 1875) | BBSL, SCAN |
| Megachilidae | Megachile agustini | Cockerell, 1905 | BBSL, SCAN |
| Megachilidae | Megachile angelarum | Cockerell, 1902 | BBSL, SCAN |
| Megachilidae | Megachile anograe | Cockerell, 1908 | BBSL, SCAN |
| Megachilidae | Megachile apicalis | Spinola, 1808 | BBSL, SCAN |
| Megachilidae | Megachile astragali | Mitchell, 1938 | BBSL, SCAN |
| Megachilidae | Megachile bradleyi | Mitchell, 1934 | BBSL, SCAN |
| Megachilidae | Megachile brevis | Say, 1837 | BBSL, SCAN |
| Megachilidae | Megachile bruneri | Mitchell, 1934 | BBSL, SCAN |
| Megachilidae | Megachile casadae | Cockerell, 1898 | BBSL, SCAN |
| Megachilidae | Megachile centuncularis | (Linnaeus, 1758) | BBSL, SCAN |
| Megachilidae | Megachile chilopsidis | Cockerell, 1900 | BBSL, SCAN |
| Megachilidae | Megachile cochisiana | Mitchell, 1934 | BBSL, SCAN |
| Megachilidae | Megachile comata | Cresson, 1872 | BBSL, SCAN |
| Megachilidae | Megachile concinna | Smith, 1879 | BBSL, SCAN |
| Megachilidae | Megachile coquilletti | Cockerell, 1915 | BBSL, SCAN |
| Megachilidae | Megachile dentitarsus | Sladen, 1919 | BBSL, SCAN |
| Megachilidae | Megachile discorhina | Cockerell, 1924 | BBSL, SCAN |
| Megachilidae | Megachile fidelis | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Megachile frigida | Smith, 1853 | BBSL, SCAN |
| Megachilidae | Megachile frugalis | Cresson, 1872 | BBSL, SCAN |
| Megachilidae | Megachile fucata | Mitchell, 1934 | BBSL, SCAN |
| Megachilidae | Megachile gemula | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Megachile gentilis | Cresson, 1872 | BBSL, SCAN |
| Megachilidae | Megachile hilata | Mitchell, 1934 | BBSL, SCAN |
| Megachilidae | Megachile hookeri | Cockerell, 1915 | BBSL, SCAN |
| Megachilidae | Megachile inermis | Provancher, 1888 | BBSL, SCAN |
| Megachilidae | Megachile inimica | Cresson, 1872 | BBSL, SCAN |
| Megachilidae | Megachile latimanus | Say, 1823 | BBSL |
| Megachilidae | Megachile laurita | Mitchell, 1927 | BBSL |
| Megachilidae | Megachile legalis | Cresson, 1879 | BBSL, SCAN |
| Megachilidae | Megachile lippiae | Cockerell, 1900 | BBSL, SCAN |
| Megachilidae | Megachile manifesta | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Megachile melanophaea | Smith, 1853 | BBSL, SCAN |
| Megachilidae | Megachile mellitarsis | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Megachile mendica | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Megachile micheneri | Mitchell, 1936 | BBSL, SCAN |
| Megachilidae | Megachile mojavensis | Mitchell, 1934 | BBSL, SCAN |
| Megachilidae | Megachile montivaga | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Megachile mucida | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Megachile mucorosa | Cockerell, 1908 | BBSL, SCAN |
| Megachilidae | Megachile nevadensis | Cresson, 1879 | BBSL, SCAN |
| Megachilidae | Megachile newberryae | Cockerell, 1900 | BBSL, SCAN |
| Megachilidae | Megachile nivalis | Friese, 1903 | BBSL, SCAN |
| Megachilidae | Megachile occidentalis | Fox, 1894 | BBSL, SCAN |
| Megachilidae | Megachile odontostoma | Cockerell, 1924 | BBSL, SCAN |
| Megachilidae | Megachile onobrychidis | Cockerell, 1908 | BBSL, SCAN |
| Megachilidae | Megachile oslari | Mitchell, 1934 | BBSL, SCAN |
| Megachilidae | Megachile palmensis | Mitchell, 1934 | BBSL, SCAN |
| Megachilidae | Megachile parallela | Smith, 1853 | BBSL, SCAN |
| Megachilidae | Megachile perihirta | Cockerell, 1898 | BBSL, SCAN |
| Megachilidae | Megachile policaris | Say, 1831 | BBSL, SCAN |
| Megachilidae | Megachile prosopidis | Cockerell, 1900 | BBSL, SCAN |
| Megachilidae | Megachile pugnata | Say, 1837 | BBSL, SCAN |
| Megachilidae | Megachile relativa | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Megachile rossi | Mitchell, 1943 | BBSL, SCAN |
| Megachilidae | Megachile rotundata | (Fabricius, 1787) | BBSL, SCAN |
| Megachilidae | Megachile sabinensis | Mitchell, 1934 | BBSL, SCAN |
| Megachilidae | Megachile snowi | Mitchell, 1927 | BBSL, SCAN |
| Megachilidae | Megachile spinotulata | Mitchell, 1934 | BBSL |
| Megachilidae | Megachile subexilis | Cockerell, 1908 | BBSL, SCAN |
| Megachilidae | Megachile sublaurita | Mitchell, 1927 | BBSL, SCAN |
| Megachilidae | Megachile subnigra | Cresson, 1879 | BBSL, SCAN |
| Megachilidae | Megachile texana | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Megachile townsendiana | Cockerell, 1898 | BBSL, SCAN |
| Megachilidae | Megachile umatillensis | (Mitchell, 1927) | BBSL, SCAN |
| Megachilidae | Megachile wheeleri | Mitchell, 1927 | BBSL, SCAN |
| Megachilidae | Megachile wyomingensis | Mitchell, 1934 | BBSL, SCAN |
| Megachilidae | Megachile xerophila | Cockerell, 1933 | BBSL, SCAN |
| Megachilidae | Osmia aglaia | Sandhouse, 1939 | BBSL |
| Megachilidae | Osmia albolateralis | Cockerell, 1906 | BBSL, SCAN |
| Megachilidae | Osmia alpestris | Rust and Bohart, 1986 | BBSL |
| Megachilidae | Osmia atrocyanea | Cockerell, 1897 | BBSL, SCAN |
| Megachilidae | Osmia austromaritima | Michener, 1936 | BBSL, SCAN |
| Megachilidae | Osmia bakeri | Sandhouse, 1924 | BBSL |
| Megachilidae | Osmia bella | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Osmia brevis | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Osmia bruneri | Cockerell, 1897 | BBSL, SCAN |
| Megachilidae | Osmia bucephala | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Osmia caerulescens | (Linnaeus, 1758) | BBSL |
| Megachilidae | Osmia californica | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Osmia calla | Cockerell, 1897 | BBSL, SCAN |
| Megachilidae | Osmia caulicola | Cockerell, 1934 | BBSL, SCAN |
| Megachilidae | Osmia cerasi | Cockerell, 1897 | BBSL, SCAN |
| Megachilidae | Osmia chalybea | Smith, 1853 | SCAN |
| Megachilidae | Osmia clarescens | Cockerell, 1911 | BBSL, SCAN |
| Megachilidae | Osmia cobaltina | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Osmia cockerelli | Sandhouse, 1939 | BBSL |
| Megachilidae | Osmia coloradensis | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Osmia cordata | Robertson, 1902 | BBSL, SCAN |
| Megachilidae | Osmia cornifrons | (Radoszkowski, 1887) | BBSL, SCAN |
| Megachilidae | Osmia crassa | Rust and Bohart, 1986 | BBSL, SCAN |
| Megachilidae | Osmia cyanella | Cockerell, 1897 | BBSL, SCAN |
| Megachilidae | Osmia cyaneonitens | Cockerell, 1906 | BBSL, SCAN |
| Megachilidae | Osmia cyanopoda | Cockerell, 1916 | BBSL, SCAN |
| Megachilidae | Osmia dakotensis | Michener, 1937 | BBSL, SCAN |
| Megachilidae | Osmia densa | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Osmia dolerosa | Sandhouse, 1939 | BBSL, SCAN |
| Megachilidae | Osmia ednae | Cockerell, 1907 | BBSL, SCAN |
| Megachilidae | Osmia exigua | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Osmia gaudiosa | Cockerell, 1907 | BBSL, SCAN |
| Megachilidae | Osmia giffardi | Sandhouse, 1939 | BBSL, SCAN |
| Megachilidae | Osmia giliarum | Cockerell, 1906 | BBSL, SCAN |
| Megachilidae | Osmia glauca | (Fowler, 1899) | BBSL, SCAN |
| Megachilidae | Osmia grindeliae | Cockerell, 1910 | BBSL, SCAN |
| Megachilidae | Osmia grinnelli | Cockerell, 1910 | BBSL, SCAN |
| Megachilidae | Osmia hurdi | White, 1952 | BBSL |
| Megachilidae | Osmia inermis | (Zetterstedt, 1838) | BBSL, SCAN |
| Megachilidae | Osmia integra | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Osmia inurbana | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Osmia iridis | Cockerell and Titus, 1902 | BBSL, SCAN |
| Megachilidae | Osmia juxta | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Osmia kincaidii | Cockerell, 1897 | BBSL, SCAN |
| Megachilidae | Osmia laeta | Sandhouse, 1924 | BBSL, SCAN |
| Megachilidae | Osmia latisulcata | Michener, 1936 | BBSL, SCAN |
| Megachilidae | Osmia lignaria | Say, 1837 | BBSL, SCAN |
| Megachilidae | Osmia liogastra | Cockerell, 1933 | BBSL, SCAN |
| Megachilidae | Osmia longula | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Osmia marginata | Michener, 1936 | BBSL, SCAN |
| Megachilidae | Osmia marginipennis | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Osmia melanopleura | Cockerell, 1916 | BBSL, SCAN |
| Megachilidae | Osmia mertensiae | Cockerell, 1907 | BBSL, SCAN |
| Megachilidae | Osmia montana | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Osmia nanula | Cockerell, 1897 | SCAN |
| Megachilidae | Osmia nemoris | Sandhouse, 1924 | BBSL, SCAN |
| Megachilidae | Osmia neocyanopoda | Rust and Bohart, 1986 | BBSL |
| Megachilidae | Osmia nifoata | Cockerell, 1909 | BBSL, SCAN |
| Megachilidae | Osmia nigrifrons | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Osmia nigriventris | (Zetterstedt, 1838) | SCAN |
| Megachilidae | Osmia obliqua | White, 1952 | BBSL, SCAN |
| Megachilidae | Osmia paradisica | Sandhouse, 1924 | BBSL, SCAN |
| Megachilidae | Osmia pellax | Sandhouse, 1924 | BBSL |
| Megachilidae | Osmia pentstemonis | Cockerell, 1906 | BBSL, SCAN |
| Megachilidae | Osmia phaceliae | Cockerell, 1907 | BBSL |
| Megachilidae | Osmia phenax | Cockerell, 1897 | BBSL, SCAN |
| Megachilidae | Osmia physariae | Cockerell, 1907 | BBSL |
| Megachilidae | Osmia pikei | Cockerell, 1907 | BBSL, SCAN |
| Megachilidae | Osmia proxima | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Osmia prunorum | Cockerell, 1897 | BBSL, SCAN |
| Megachilidae | Osmia pusilla | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Osmia raritatis | Michener, 1957 | BBSL, SCAN |
| Megachilidae | Osmia rawlinsi | Sandhouse, 1939 | BBSL, SCAN |
| Megachilidae | Osmia regulina | Cockerell, 1911 | BBSL |
| Megachilidae | Osmia ribifloris | Cockerell, 1900 | BBSL, SCAN |
| Megachilidae | Osmia sandhouseae | Mitchell, 1927 | BBSL, SCAN |
| Megachilidae | Osmia sanrafaelae | Parker, 1985 | BBSL, SCAN |
| Megachilidae | Osmia sculleni | Sandhouse, 1939 | BBSL, SCAN |
| Megachilidae | Osmia sedula | Sandhouse, 1924 | BBSL, SCAN |
| Megachilidae | Osmia simillima | Smith, 1853 | BBSL, SCAN |
| Megachilidae | Osmia sladeni | Sandhouse, 1925 | BBSL |
| Megachilidae | Osmia subaustralis | Cockerell, 1900 | BBSL, SCAN |
| Megachilidae | Osmia tanneri | Sandhouse, 1939 | BBSL, SCAN |
| Megachilidae | Osmia tersula | Cockerell, 1912 | BBSL, SCAN |
| Megachilidae | Osmia texana | Cresson, 1872 | BBSL, SCAN |
| Megachilidae | Osmia thysanisca | Michener, 1957 | BBSL, SCAN |
| Megachilidae | Osmia titusi | Cockerell, 1905 | BBSL |
| Megachilidae | Osmia trevoris | Cockerell, 1897 | BBSL, SCAN |
| Megachilidae | Osmia tristella | Cockerell, 1897 | BBSL, SCAN |
| Megachilidae | Osmia unca | Michener, 1937 | BBSL, SCAN |
| Megachilidae | Osmia vandykei | Sandhouse, 1924 | BBSL, SCAN |
| Megachilidae | Paranthidium jugatorium | (Say, 1824) | BBSL, SCAN |
| Megachilidae | Protosmia rubifloris | (Cockerell, 1898) | BBSL, SCAN |
| Megachilidae | Stelis alta | Parker and Griswold, 2013 | BBSL, SCAN |
| Megachilidae | Stelis anasazi | Parker and Griswold, 2013 | BBSL |
| Megachilidae | Stelis anthocopae | Parker and Griswold, 2013 | BBSL, SCAN |
| Megachilidae | Stelis anthracina | Timberlake, 1941 | BBSL |
| Megachilidae | Stelis ashmeadiellae | Timberlake, 1941 | BBSL |
| Megachilidae | Stelis calliphorina | (Cockerell, 1911) | BBSL |
| Megachilidae | Stelis callura | Cockerell, 1925 | BBSL, SCAN |
| Megachilidae | Stelis carnifex | Cockerell, 1911 | BBSL, SCAN |
| Megachilidae | Stelis diversicolor | Crawford, 1916 | BBSL, SCAN |
| Megachilidae | Stelis foederalis | Smith, 1854 | BBSL, SCAN |
| Megachilidae | Stelis imperialis | Parker and Griswold, 2013 | BBSL, SCAN |
| Megachilidae | Stelis interrupta | Cresson, 1879 | BBSL, SCAN |
| Megachilidae | Stelis lamelliterga | Parker and Griswold, 2013 | BBSL, SCAN |
| Megachilidae | Stelis lateralis | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Stelis louisae | Cockerell, 1911 | SCAN |
| Megachilidae | Stelis montana | Cresson, 1864 | BBSL, SCAN |
| Megachilidae | Stelis nitida | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Stelis occidentalis | Parker and Griswold, 2013 | BBSL, SCAN |
| Megachilidae | Stelis paiute | Parker and Griswold, 2013 | BBSL, SCAN |
| Megachilidae | Stelis palmarum | Timberlake, 1941 | BBSL, SCAN |
| Megachilidae | Stelis pavonina | (Cockerell, 1908) | BBSL, SCAN |
| Megachilidae | Stelis perpulchra | Crawford, 1916 | BBSL, SCAN |
| Megachilidae | Stelis robertsoni | Timberlake, 1941 | BBSL, SCAN |
| Megachilidae | Stelis rudbeckiarum | Cockerell, 1904 | BBSL, SCAN |
| Megachilidae | Stelis shoshone | Parker and Griswold, 2013 | BBSL, SCAN |
| Megachilidae | Stelis subcaerulea | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Stelis subemarginata | Cresson, 1878 | BBSL, SCAN |
| Megachilidae | Trachusa cordaticeps | (Michener, 1949) | BBSL, SCAN |
| Megachilidae | Trachusa larreae | (Cockerell, 1897) | BBSL, SCAN |
| Megachilidae | Trachusa zebrata | (Cresson, 1872) | BBSL, SCAN |
| Melittidae | Hesperapis carinata | Stevens, 1919 | BBSL, SCAN |
| Melittidae | Hesperapis elegantula | Cockerell, 1898 | BBSL, SCAN |
| Melittidae | Hesperapis larreae | Cockerell, 1907 | BBSL, SCAN |
| Melittidae | Hesperapis oliviae | (Cockerell, 1897) | BBSL |
| Melittidae | Hesperapis rufipes | (Ashmead, 1899) | SCAN |
| Melittidae | Macropis nuda | (Provancher, 1882) | BBSL, SCAN |
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Figure 1.
Map showing the published number of bee species found in each state or province. Utah is marked with the number of bee species reported in this study, 1167.
Figure 1.
Map showing the published number of bee species found in each state or province. Utah is marked with the number of bee species reported in this study, 1167.
Figure 2.
Utah map of counties showing known species richness.
Figure 3.
Bee species diversity in each of the six bee families found in Utah.
Table 1.
Published North American state/province bee species lists.
| State/Province | Online/Print | Species Richness | Reference |
|---|---|---|---|
| British Columbia | 483 | [2] | |
| Colorado | 946 | [3] | |
| Florida | Online | 316 | [4] |
| Georgia | Online | 542 | [5] |
| Illinois | 491 | [6] | |
| Indiana | 416 | [7] | |
| Louisiana | 163 | [8] | |
| Maine | 278 | [9] | |
| Manitoba | 392 * | [10] | |
| Maryland | Online | 432 | [11] |
| Massachusetts | 390 | [12] | |
| Michigan | 465 | [13] | |
| Minnesota | 508 | [14] | |
| New York | Online | 450 | [15] |
| North Carolina | Online | 594 | [16] |
| Ohio | Online | 251 | [17] |
| Pennsylvania | 437 | [18] | |
| Puerto Rico | 39 | [19] | |
| Vermont | Online | 350 | [20] |
| Virginia | Online | 477 | [21] |
| Washington | 565 | [22] | |
| Wisconsin | 388 | [23] |
* includes morphospecies.
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Wilson, J.S.; Hunsaker, A.; Griswold, T.L.; Messinger Carril, O. A Checklist of the Bees of Utah. Diversity 2025, 17, 212. https://doi.org/10.3390/d17030212
AMA Style
Wilson JS, Hunsaker A, Griswold TL, Messinger Carril O. A Checklist of the Bees of Utah. Diversity. 2025; 17(3):212. https://doi.org/10.3390/d17030212
Chicago/Turabian StyleWilson, Joseph S., Anthony Hunsaker, Terry L. Griswold, and Olivia Messinger Carril. 2025. "A Checklist of the Bees of Utah" Diversity 17, no. 3: 212. https://doi.org/10.3390/d17030212
APA StyleWilson, J. S., Hunsaker, A., Griswold, T. L., & Messinger Carril, O. (2025). A Checklist of the Bees of Utah. Diversity, 17(3), 212. https://doi.org/10.3390/d17030212
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