| Ancylandrena atoposoma Cockerell, 1934 | |
| Ancylandrena koebelei Timberlake, 1951 | |
| Ancylandrena larreae Timberlake, 1951 | Creosote Bush Ancylandrena |
| Ancylandrena timberlakei Zavortink, 1974 | |
| Andrena (Aciandrena) hillana Warncke, 1968 | |
| Andrena (Anchandrena) angustella Cockerell, 1936 | |
| Andrena (Andrena) birtwelli Cockerell, 1901 | |
| Andrena (Andrena) buckelli Viereck, 1924 | Centaury |
| Andrena (Andrena) ceanothifloris Linsley, 1938 | |
| Andrena (Andrena) edwardsi Viereck, 1916 | |
| Andrena (Andrena) frigida Smith, 1853 | Frigid Andrena |
| Andrena (Andrena) hemileuca Viereck, 1904 | |
| Andrena (Andrena) laminibucca Viereck & Co..., 1914 | |
| Andrena (Andrena) macoupinensis Robertson, 1900 | Macoupin County Miner Bee |
| Andrena (Andrena) perarmata Cockerell, 1898 | Well-armed Andrena |
| Andrena (Andrena) prolixa LaBerge, 1980 | |
| Andrena (Andrena) rufosignata Cockerell, 1902 | Brown-Fovea Miner |
| Andrena (Andrena) saccata Viereck, 1904 | |
| Andrena (Andrena) schuhi LaBerge, 1980 | |
| Andrena (Andrena) thaspii Graenicher, 1903 | Parsnip Miner Bee |
| Andrena (Andrena) topazana Cockerell, 1906 | |
| Andrena (Andrena) tridens Robertson, 1902 | Trident Miner Bee |
| Andrena (Andrena) vicinoides Viereck, 1904 | |
| Andrena (Andrena) washingtoni Cockerell, 1901 | |
| Andrena (Aporandrena) coactipostica Viereck, 1917 | Yellow screwstem |
| Andrena (Augandrena) plumiscopa Timberlake, 1951 | |
| Andrena (Belandrena) palpalis Timberlake, 1951 | |
| Andrena (Belandrena) sagittagalea Ribble, 1968 | |
| Andrena (Belandrena) sphaeralceae Linsley, 1939 | Globemallow Andrena |
| Andrena (Callandrena) accepta Viereck, 1916 | |
| Andrena (Callandrena) aegyptiaca Friese, 1899 | |
| Andrena (Callandrena) helianthi Robertson, 1891 | Sunflower Andrena |
| Andrena (Callandrena) isocomae Timberlake, 1951 | |
| Andrena (Campylogaster) lateralis Morawitz, 1876 | |
| Andrena (Carandrena) decaocta Warncke, 1967 | |
| Andrena (Cnemidandrena) aurihirta Donovan, 1977 | |
| Andrena (Cnemidandrena) canadensis Dalla Torre, 1896 | Canada Andrena |
| Andrena (Cnemidandrena) chromotricha Cockerell, 1899 | Pigmented Miner Bee |
| Andrena (Cnemidandrena) colletina Cockerell, 1906 | |
| Andrena (Cnemidandrena) columbiana Viereck, 1917 | Yellow screwstem |
| Andrena (Cnemidandrena) luteihirta Donovan, 1977 | |
| Andrena (Cnemidandrena) mentzeliae Cockerell, 1897 | Blazing-star Andrena |
| Andrena (Cnemidandrena) scutellinitens Viereck, 1916 | Yellow screwstem |
| Andrena (Cnemidandrena) surda Cockerell, 1910 | |
| Andrena (Conandrena) bradleyi Viereck, 1907 | Bradley'S Mining Bee |
| Andrena (Conandrena) cheyennorum Viereck & Co..., 1914 | Soldier |
| Andrena (Cremandrena) anisochlora Cockerell, 1936 | |
| Andrena (Dactylandrena) caliginosa Viereck, 1916 | Yellow screwstem |
| Andrena (Dactylandrena) porterae Cockerell, 1900 | |
| Andrena (Dactylandrena) submaura Linsley, 1938 | |
| Andrena (Dasyandrena) cristata Viereck, 1917 | Yellow screwstem |
| Andrena (Dasyandrena) latifrons LaBerge, 1977 | |
| Andrena (Dasyandrena) obscuripostica Viereck, 1916 | Yellow screwstem |
| Andrena (Derandrena) timberlakei Cockerell, 1929 | |
| Andrena (Derandrena) vandykei Cockerell, 1936 | |
| Andrena (Derandrena) viridissima Ribble, 1968 | |
| Andrena (Diandrena) ablegata Cockerell, 1922 | |
| Andrena (Diandrena) agoseridis Thorp, 1969 | |
| Andrena (Diandrena) apasta Linsley & Ma..., 1961 | |
| Andrena (Diandrena) chalybaea Cresson, 1878 | |
| Andrena (Diandrena) chalybioides Viereck, 1904 | |
| Andrena (Diandrena) chlorosoma Linsley & Ma..., 1961 | |
| Andrena (Diandrena) cuneilabris Viereck, 1926 | |
| Andrena (Diandrena) cyanosoma Cockerell, 1916 | |
| Andrena (Diandrena) evoluta Linsley & Ma..., 1961 | |
| Andrena (Diandrena) foxii Cockerell, 1898 | |
| Andrena (Diandrena) macswaini Linsley, 1960 | |
| Andrena (Diandrena) malacothricidis Thorp, 1969 | Desert-dandelion Andrena |
| Andrena (Diandrena) nothocalaidis Cockerell, 1905 | |
| Andrena (Diandrena) olivacea Viereck, 1916 | Olivaceous Andrena |
| Andrena (Diandrena) parachalybea Viereck, 1917 | Yellow screwstem |
| Andrena (Diandrena) puthua Cockerell, 1910 | |
| Andrena (Diandrena) subapasta Thorp, 1969 | |
| Andrena (Diandrena) subchalybea (Viereck, 1916) | ⇒ Andrena chlorosoma Linsley & Ma..., 1961 |
| Andrena (Diandrena) submoesta Viereck, 1916 | Yellow screwstem |
| Andrena (Erandrena) principalis LaBerge, 1986 | |
| Andrena (Euandrena) algida Smith, 1853 | Icy Miner Bee |
| Andrena (Euandrena) astragali Viereck & Co..., 1914 | |
| Andrena (Euandrena) auricoma Smith, 1879 | Bunchberry dogwood |
| Andrena (Euandrena) caerulea Smith, 1879 | Bunchberry dogwood |
| Andrena (Euandrena) chlorura Cockerell, 1916 | |
| Andrena (Euandrena) dissimulans Timberlake, 1951 | |
| Andrena (Euandrena) hamulata LaBerge & Ri..., 1975 | |
| Andrena (Euandrena) lawrencei Viereck & Co..., 1914 | |
| Andrena (Euandrena) nigrihirta Ashmead, 1890 | Black-Haired Miner Bee |
| Andrena (Euandrena) nigrocaerulea Cockerell, 1897 | Blue-and-black Andrena |
| Andrena (Euandrena) ribblei LaBerge, 1977 | |
| Andrena (Euandrena) suavis Timberlake, 1938 | |
| Andrena (Euandrena) subdepressa Timberlake, 1951 | |
| Andrena (Geissandrena) trevoris Cockerell, 1897 | |
| Andrena (Gonandrena) fragilis Smith, 1853 | Fragile Dogwood Andrena |
| Andrena (Gonandrena) persimulata Viereck, 1917 | Protuberance Miner Bee |
| Andrena (Gonandrena) platyparia Robertson, 1895 | Plated Miner Bee |
| Andrena (Hesperandrena) lativentris Timberlake, 1951 | |
| Andrena (Hesperandrena) pulverea Viereck, 1916 | Yellow screwstem |
| Andrena (Holandrena) cressonii Robertson, 1891 | Cresson'S Mining Bee |
| Andrena (Hoplandrena) trimmerana Kirby, 1802 | Trimmer's mining bee |
| Andrena (Larandrena) miserabilis Cresson, 1872 | Mining bee |
| Andrena (Leucandrena) barbilabris Kirby, 1802 | Long-lipped Andrena |
| Andrena (Melanapis) fuscosa Erichson, 1835 | |
| Andrena (Melandrena) carlini Cockerell, 1901 | Carlin'S Mining Bee |
| Andrena (Melandrena) cerasifolii Cockerell, 1896 | |
| Andrena (Melandrena) commoda Smith, 1879 | Advantaged Miner Bee |
| Andrena (Melandrena) hilaris Smith, 1853 | Stout tagelus |
| Andrena (Melandrena) impolita LaBerge, 1987 | Unpolished Andrena |
| Andrena (Melandrena) lupinorum Cockerell, 1906 | |
| Andrena (Melandrena) nigripes Provancher, 1895 | Big-headed Andrena |
| Andrena (Melandrena) nivalis Smith, 1853 | Snowy Andrena |
| Andrena (Melandrena) perimelas Cockerell, 1905 | |
| Andrena (Melandrena) pertristis Cockerell, 1905 | |
| Andrena (Melandrena) sola Viereck, 1916 | Lonely Andrena |
| Andrena (Melandrena) transnigra Viereck, 1904 | Black-banded Andrena |
| Andrena (Melandrena) vicina Smith, 1853 | Neighborly Andrena |
| Andrena (Micrandrena) candidiformis Viereck & Co..., 1914 | |
| Andrena (Micrandrena) chlorogaster Viereck, 1904 | |
| Andrena (Micrandrena) illinoiensis Robertson, 1891 | |
| Andrena (Micrandrena) labergei Ribble, 1968 | |
| Andrena (Micrandrena) melanochroa Cockerell, 1898 | Rose Miner Bee |
| Andrena (Micrandrena) microchlora Cockerell, 1922 | |
| Andrena (Micrandrena) piperi Viereck, 1904 | |
| Andrena (Micrandrena) primulifrons Casad, 1896 | |
| Andrena (Micrandrena) spreta (Perez, 1895) | ⇒ Andrena niveata Friese, 1887 |
| Andrena (Micrandrena) ziziae Robertson, 1891 | Golden-Alexanders Andrena |
| Andrena (Nemandrena) crudeni LaBerge, 1971 | |
| Andrena (Nemandrena) subnigripes Viereck, 1916 | Yellow screwstem |
| Andrena (Nemandrena) torulosa LaBerge, 1971 | |
| Andrena (Notandrena) nitidiuscula Schenck, 1853 | Carrot mining bee |
| Andrena (Oligandrena) angelesia Timberlake, 1951 | |
| Andrena (Oligandrena) macrocephala (Cockerell, 1916) | ⇒ Andrena nigripes Provancher, 1895 |
| Andrena (Oligandrena) nigroclypeata Linsley, 1939 | |
| Andrena (Onagrandrena) apacheorum Cockerell, 1897 | |
| Andrena (Onagrandrena) blaisdelli Cockerell, 1924 | |
| Andrena (Onagrandrena) boronensis Linsley & Ma..., 1962 | |
| Andrena (Onagrandrena) chylismiae Linsley & Ma..., 1961 | |
| Andrena (Onagrandrena) furva Linsley & Ma..., 1961 | |
| Andrena (Onagrandrena) oenotherae Timberlake, 1937 | |
| Andrena (Onagrandrena) omninigra Viereck, 1917 | Yellow screwstem |
| Andrena (Onagrandrena) rozeni Linsley & Ma..., 1955 | Black marlin |
| Andrena (Parandrena) bucculenta LaBerge & Ri..., 1972 | |
| Andrena (Parandrena) concinnula Cockerell, 1898 | |
| Andrena (Parandrena) nevadensis Cresson, 1879 | |
| Andrena (Parandrena) papagorum Viereck & Co..., 1914 | |
| Andrena (Pelicandrena) atypica Cockerell, 1941 | |
| Andrena (Plastandrena) crataegi Robertson, 1893 | Hawthorn Andrena |
| Andrena (Plastandrena) fracta Casad & Cock..., 1896 | |
| Andrena (Plastandrena) prunorum Cockerell, 1896 | |
| Andrena (Pterandrena) placata Mitchell, 1960 | Peaceful Miner Bee |
| Andrena (Ptilandrena) angustior Kirby, 1802 | Groove-faced mining bee |
| Andrena (Rhaphandrena) prima Casad, 1896 | |
| Andrena (Scaphandrena) chapmanae Viereck, 1904 | |
| Andrena (Scaphandrena) cruciferarum Ribble, 1974 | |
| Andrena (Scaphandrena) hicksi Cockerell, 1925 | |
| Andrena (Scaphandrena) merriami Cockerell, 1901 | |
| Andrena (Scaphandrena) plana Viereck, 1904 | |
| Andrena (Scaphandrena) scurra Viereck, 1904 | |
| Andrena (Scaphandrena) sladeni Viereck, 1924 | Centaury |
| Andrena (Scoliandrena) cryptanthae Timberlake, 1951 | |
| Andrena (Scoliandrena) osmioides Cockerell, 1916 | |
| Andrena (Scrapteropsis) angusticrus LaBerge, 1971 | |
| Andrena (Scrapteropsis) buccata LaBerge, 1971 | |
| Andrena (Scrapteropsis) fenningeri Viereck, 1922 | |
| Andrena (Scrapteropsis) nigra Provancher, 1895 | |
| Andrena (Scrapteropsis) stipator LaBerge, 1971 | |
| Andrena (Simandrena) angustitarsata Viereck, 1904 | |
| Andrena (Simandrena) hypoleuca Cockerell, 1939 | |
| Andrena (Simandrena) orthocarpi Cockerell, 1936 | |
| Andrena (Simandrena) pallidifovea Viereck, 1904 | Pale-fovea Andrena |
| Andrena (Simandrena) pensilis Timberlake, 1938 | |
| Andrena (Simandrena) subtrita Cockerell, 1910 | |
| Andrena (Thysandrena) candida Smith, 1879 | Bunchberry dogwood |
| Andrena (Thysandrena) knuthiana Cockerell, 1901 | |
| Andrena (Thysandrena) livida LaBerge, 1977 | |
| Andrena (Thysandrena) medionitens Cockerell, 1902 | |
| Andrena (Thysandrena) quadrilimbata LaBerge, 1977 | |
| Andrena (Thysandrena) trizonata Ashmead, 1890 | |
| Andrena (Thysandrena) vierecki Cockerell, 1904 | |
| Andrena (Thysandrena) w-scripta Viereck, 1904 | W-Marked Miner Bee |
| Andrena (Trachandrena) amphibola Viereck, 1904 | |
| Andrena (Trachandrena) cleodora Viereck, 1904 | |
| Andrena (Trachandrena) cyanophila Cockerell, 1906 | |
| Andrena (Trachandrena) forbesii Robertson, 1891 | Forbes' Mining Bee |
| Andrena (Trachandrena) fuscicauda Viereck, 1904 | Dark-tailed Andrena |
| Andrena (Trachandrena) hippotes Robertson, 1895 | Hippotes'S Miner Bee |
| Andrena (Trachandrena) miranda Smith, 1879 | Bunchberry dogwood |
| Andrena (Trachandrena) quintiliformis Viereck, 1916 | Yellow screwstem |
| Andrena (Trachandrena) rehni Viereck, 1907 | |
| Andrena (Trachandrena) salicifloris Cockerell, 1897 | Willow mining bee |
| Andrena (Trachandrena) semipunctata Cockerell, 1902 | |
| Andrena (Trachandrena) sigmundi Cockerell, 1902 | Sigmund'S Mining Bee |
| Andrena (Trachandrena) striatifrons Cockerell, 1897 | |
| Andrena (Tylandrena) coracina LaBerge & Bo..., 1970 | |
| Andrena (Tylandrena) layiae Timberlake, 1951 | |
| Andrena (Tylandrena) subaustralis Cockerell, 1898 | |
| Andrena (Tylandrena) subtilis Smith, 1879 | Bunchberry dogwood |
| Andrena (Zonandrena) vachali Perez, 1895 | Chrysanthemum gall midge |
| Andrena albiculta Viereck, 1917 | Yellow screwstem |
| Andrena anatolis Linsley & Ma..., 1961 | |
| Andrena annectens Ribble, 1968 | |
| Andrena aquila LaBerge, 1971 | |
| Andrena arctostaphylae Ribble, 1968 | |
| Andrena argentiscopa Viereck, 1917 | Yellow screwstem |
| Andrena baeriae Timberlake, 1941 | |
| Andrena bendensis Donovan, 1977 | |
| Andrena berkeleyi Viereck & Co..., 1914 | |
| Andrena bernardina Linsley, 1938 | |
| Andrena biareola LaBerge, 1971 | |
| Andrena blennospermatis Thorp, 1969 | |
| Andrena bocensis Donovan, 1977 | |
| Andrena burkelli Bingham, 1908 | |
| Andrena californiensis Ribble, 1968 | |
| Andrena calvata LaBerge, 1967 | |
| Andrena cercocarpi Cockerell, 1936 | |
| Andrena citrinihirta Viereck, 1917 | Yellow screwstem |
| Andrena claremonti Viereck, 1926 | |
| Andrena coconina LaBerge, 1980 | |
| Andrena compositarum Thorp & LaBerge, 2005 | |
| Andrena compositorum | |
| Andrena congrua LaBerge, 1977 | |
| Andrena cupreotincta Cockerell, 1901 | |
| Andrena cymatilis LaBerge, 1987 | |
| Andrena davidsoni Viereck & Co..., 1914 | |
| Andrena declinis LaBerge, 1977 | |
| Andrena decolorata LaBerge & Thorp, 2005 | |
| Andrena deserticola Timberlake, 1937 | |
| Andrena dissona Thorp & LaBerge, 2005 | |
| Andrena duboisi Timberlake, 1951 | |
| Andrena elongatula Viereck, 1917 | Yellow screwstem |
| Andrena enocki Cockerell, 1898 | |
| Andrena eothina Linsley & Ma..., 1961 | |
| Andrena eremophila Thorp & LaBerge, 2005 | |
| Andrena escondida Cockerell, 1938 | |
| Andrena ferrugineipes LaBerge, 1977 | |
| Andrena flandersi Timberlake, 1937 | |
| Andrena gardineri Cockerell, 1906 | |
| Andrena gibberis Viereck, 1924 | Centaury |
| Andrena gnaphalii Cockerell, 1938 | |
| Andrena gordoni Ribble, 1974 | |
| Andrena grindeliae Donovan, 1977 | |
| Andrena hermosa Ribble, 1968 | |
| Andrena hurdi Lanham, 1949 | |
| Andrena illustris LaBerge, 1977 | |
| Andrena inclinata Viereck, 1916 | Yellow screwstem |
| Andrena ishii Ribble, 1968 | |
| Andrena latinensis Donovan, 1977 | |
| Andrena lauta LaBerge, 1977 | |
| Andrena lepidii Ribble, 1968 | |
| Andrena leucomystax Thorp & LaBerge, 2005 | |
| Andrena levipes LaBerge, 1967 | |
| Andrena lewisorum Thorp, 1969 | |
| Andrena linsleyi Timberlake, 1937 | |
| Andrena lomatii Ribble, 1974 | |
| Andrena longifovea LaBerge, 1977 | |
| Andrena mackieae Cockerell, 1937 | |
| Andrena manifesta Fox, 1894 | |
| Andrena mariposorum Viereck, 1917 | Yellow screwstem |
| Andrena mesoleuca Cockerell, 1924 | |
| Andrena misella Timberlake, 1951 | |
| Andrena mohavensis Ribble, 1974 | |
| Andrena mojavensis Linsley & Ma..., 1955 | Black marlin |
| Andrena monoensis LaBerge, 1980 | |
| Andrena monogonoparia Viereck, 1917 | Yellow screwstem |
| Andrena murietae Ribble, 1968 | |
| Andrena nemophilae Ribble, 1968 | |
| Andrena pallidiscopa Viereck, 1904 | |
| Andrena pectilis LaBerge, 1986 | |
| Andrena penemisella LaBerge & Ri..., 1975 | |
| Andrena penutiani Ribble, 1968 | |
| Andrena phenax Cockerell, 1898 | |
| Andrena quercina Cockerell, 1939 | |
| Andrena raveni Linsley & Ma..., 1961 | |
| Andrena rubrotincta Linsley, 1938 | |
| Andrena sancta Viereck, 1916 | Yellow screwstem |
| Andrena santaclarae Ribble, 1974 | |
| Andrena semifulva Viereck, 1916 | Yellow screwstem |
| Andrena siccata LaBerge, 1986 | |
| Andrena sperryi Cockerell, 1937 | |
| Andrena stagei Linsley & Ma..., 1962 | |
| Andrena stictigastra Viereck, 1917 | Yellow screwstem |
| Andrena striata Wu, 1977 | |
| Andrena sublayiae LaBerge & Bo..., 1970 | |
| Andrena subrubicunda LaBerge, 1986 | |
| Andrena taeniata Viereck, 1916 | Yellow screwstem |
| Andrena tegularis LaBerge, 1967 | |
| Andrena tildeni Ribble, 1974 | |
| Andrena trivialis Viereck, 1917 | Yellow screwstem |
| Andrena vanduzeei Linsley, 1938 | |
| Andrena venata LaBerge & Ri..., 1975 | |
| Andrena vespertina Linsley & Ma..., 1961 | |
| Andrena vulpicolor Cockerell, 1897 | |
| Andrena waldmerei LaBerge & Bo..., 1970 | |
| Calliopsis (Calliopsima) coloradensis Cresson, 1878 | |
| Calliopsis (Calliopsima) pectidis Shinn, 1965 | |
| Calliopsis (Calliopsima) philiphunteri Shinn & Engel, 2003 | |
| Calliopsis (Calliopsima) pugionis Cockerell, 1925 | |
| Calliopsis (Calliopsima) rozeni Shinn, 1965 | |
| Calliopsis (Calliopsis) rhodophila Cockerell, 1897 | |
| Calliopsis (Hypomacrotera) subalpina Cockerell, 1894 | |
| Calliopsis (Macronomadopsis) anthidia Fowler, 1899 | |
| Calliopsis anthidia lutea Rozen, 1958 | |
| Calliopsis (Micronomadopsis) barbata Timberlake, 1952 | Bearded Nomadopsis |
| Calliopsis (Micronomadopsis) fracta Rozen, 1952 | |
| Calliopsis (Micronomadopsis) helianthi Swenk & Cock..., 1907 | Euphorbia Nomadopsis |
| Calliopsis (Micronomadopsis) hesperia Swenk & Cock..., 1907 | |
| Calliopsis (Micronomadopsis) scutellaris Fowler, 1899 | |
| Calliopsis (Micronomadopsis) trifolii Timberlake, 1952 | |
| Calliopsis (Nomadopsis) cincta Cresson, 1879 | |
| Calliopsis (Nomadopsis) comptula Cockerell, 1916 | |
| Calliopsis (Nomadopsis) edwardsii Cresson, 1878 | |
| Calliopsis (Nomadopsis) filiorum Rozen, 1963 | |
| Calliopsis (Nomadopsis) linsleyi Rozen, 1958 | Linsley´s Nomadopsis |
| Calliopsis (Nomadopsis) obscurella Cresson, 1879 | |
| Calliopsis (Nomadopsis) puellae Cockerell, 1933 | Desert-dandelion Nomadopsis |
| Calliopsis (Nomadopsis) zonalis Cresson, 1879 | |
| Calliopsis (Perissander) anomoptera Michener, 1942 | Strange-winged Calliopsis |
| Calliopsis (Verbenapis) michenerella Shinn & Engel, 2003 | |
| Calliopsis bernardinensis Michener, 1937 | |
| Calliopsis boharti Rozen, 1958 | |
| Calliopsis cazieri Rozen, 1958 | |
| Calliopsis deserticola Shinn, 1967 | |
| Calliopsis foleyi Timberlake, 1952 | |
| Calliopsis larreae Timberlake, 1952 | |
| Calliopsis mellipes Timberlake, 1952 | |
| Calliopsis micheneri (Rozen, 1958) | ⇒ Calliopsis michenerella Shinn & Engel, 2003 |
| Calliopsis nigromaculata Timberlake, 1952 | |
| Calliopsis phaceliae Timberlake, 1952 | |
| Calliopsis smithi Rozen, 1958 | |
| Calliopsis syphar Shinn, 1967 | |
| Calliopsis xenus Rozen, 1958 | |
| Calliopsus foleyi | |
| Calliopsus puellae | |
| Calliopsus squamifera | |
| Calliopsus subalpinus | |
| Macrotera (Cockerellula) opuntiae Cockerell, 1922 | Sandstone Mining Bee |
| Macrotera (Macroterella) mortuaria Timberlake, 1954 | |
| Macrotera (Macroteropsis) arcuata Fox, 1893 | |
| Macrotera carinata Timberlake, 1968 | |
| Macrotera latior Cockerell, 1896 | |
| Macrotera mellea Timberlake, 1954 | |
| Macrotera nigrella Timberlake, 1954 | |
| Macrotera tristella Timberlake, 1954 | |
| Megandrena (Megandrena) enceliae Cockerell, 1927 | Encelia Megandrena |
| Panurginus armaticeps Cockerell, 1916 | |
| Panurginus atramontensis Crawford, 1926 | |
| Panurginus atriceps Cresson, 1878 | |
| Panurginus bilobatus Michener, 1937 | |
| Panurginus ceanothi Michener, 1935 | |
| Panurginus gabrielis Michener, 1935 | |
| Panurginus gracilis Michener, 1935 | |
| Panurginus melanocephalus Cockerell, 1926 | |
| Panurginus nigrellus Crawford, 1926 | |
| Panurginus nigrihirtus Michener, 1935 | |
| Panurginus occidentalis Crawford, 1916 | |
| Perdita (Cockerellia) albihirta Timberlake, 1954 | |
| Perdita (Cockerellia) scopata Timberlake, 1953 | |
| Perdita (Cockerellia) utahensis Cockerell, 1896 | |
| Perdita (Cockerellia) verbesinae Cockerell, 1896 | |
| Perdita (Glossoperdita) pelargoides Cockerell, 1916 | |
| Perdita (Hesperoperdita) pyrifera Cockerell, 1925 | |
| Perdita (Hesperoperdita) trisignata Cockerell, 1896 | |
| Perdita trisignata trisignata Cockerell, 1896 | |
| Perdita (Heteroperdita) arenaria Timberlake, 1954 | |
| Perdita (Heteroperdita) coldeniae Timberlake, 1954 | |
| Perdita (Heteroperdita) maculosa Timberlake, 1958 | |
| Perdita (Heteroperdita) rhodogastra Timberlake, 1954 | |
| Perdita (Hexaperdita) callicerata Cockerell, 1897 | |
| Perdita (Hexaperdita) heterothecae Cockerell, 1900 | |
| Perdita (Hexaperdita) ignota Cockerell, 1896 | |
| Perdita (Pentaperdita) albovittata Cockerell, 1895 | |
| Perdita (Pentaperdita) melanochlora Cockerell, 1922 | |
| Perdita (Perdita) acaciae Timberlake, 1962 | |
| Perdita (Perdita) aemula Timberlake, 1958 | |
| Perdita (Perdita) ashmeadi Cockerell, 1899 | |
| Perdita (Perdita) beatula Timberlake, 1960 | |
| Perdita (Perdita) bicuspidariae Timberlake, 1962 | |
| Perdita (Perdita) bridwelli Timberlake, 1960 | |
| Perdita (Perdita) chloris Timberlake, 1960 | |
| Perdita (Perdita) chrysothamni Timberlake, 1958 | |
| Perdita (Perdita) ciliata Timberlake, 1958 | |
| Perdita (Perdita) claypolei Cockerell, 1901 | |
| Perdita (Perdita) cleomellae Cockerell, 1925 | |
| Perdita (Perdita) colei Timberlake, 1962 | |
| Perdita (Perdita) confusa Timberlake, 1964 | |
| Perdita (Perdita) covilleae Timberlake, 1958 | |
| Perdita (Perdita) crotonis Cockerell, 1896 | |
| Perdita crotonis leucoptera Timberlake, 1960 | |
| Perdita (Perdita) dasylirii Cockerell, 1907 | |
| Perdita (Perdita) dentata Timberlake, 1964 | |
| Perdita (Perdita) difficilis Timberlake, 1964 | |
| Perdita (Perdita) elegans Timberlake, 1960 | |
| Perdita (Perdita) eremica Timberlake, 1964 | |
| Perdita (Perdita) ericameriae Timberlake, 1958 | |
| Perdita (Perdita) eucnides Timberlake, 1964 | |
| Perdita (Perdita) exclamans Cockerell, 1895 | |
| Perdita (Perdita) eximia Timberlake, 1964 | |
| Perdita (Perdita) flavipes Timberlake, 1964 | |
| Perdita (Perdita) fulvicauda Timberlake, 1962 | |
| Perdita (Perdita) gutierreziae Cockerell, 1896 | |
| Perdita (Perdita) halictoides Smith, 1853 | Ground-Cherry Mining Bee |
| Perdita (Perdita) heliotropii Cockerell, 1900 | |
| Perdita (Perdita) hirticeps Timberlake, 1960 | |
| Perdita (Perdita) indioensis Timberlake, 1960 | |
| Perdita (Perdita) isocomae Timberlake, 1958 | |
| Perdita (Perdita) koebelei Timberlake, 1964 | |
| Perdita (Perdita) lateralis Timberlake, 1962 | |
| Perdita (Perdita) lepidosparti Timberlake, 1958 | |
| Perdita (Perdita) luciae Cockerell, 1899 | |
| Perdita luciae decora Timberlake, 1964 | |
| Perdita (Perdita) luteiceps Cockerell, 1896 | |
| Perdita (Perdita) media Timberlake, 1960 | |
| Perdita (Perdita) nasuta Timberlake, 1962 | |
| Perdita (Perdita) nigridia Timberlake, 1962 | |
| Perdita (Perdita) numerata Cockerell, 1895 | |
| Perdita (Perdita) obliqua Timberlake, 1928 | |
| Perdita (Perdita) oregonensis Timberlake, 1929 | |
| Perdita (Perdita) pallidipes Timberlake, 1964 | |
| Perdita (Perdita) pectidis Cockerell, 1896 | |
| Perdita (Perdita) polita Timberlake, 1958 | |
| Perdita (Perdita) polytropica Timberlake, 1962 | |
| Perdita (Perdita) prosopidis Timberlake, 1964 | |
| Perdita (Perdita) proxima Timberlake, 1958 | |
| Perdita (Perdita) punctifrons Timberlake, 1958 | |
| Perdita (Perdita) punctosignata Cockerell, 1895 | |
| Perdita punctosignata sulphurea Timberlake, 1964 | |
| Perdita (Perdita) punctulata Timberlake, 1958 | |
| Perdita (Perdita) rhois Cockerell, 1901 | |
| Perdita (Perdita) rivalis Timberlake, 1958 | |
| Perdita (Perdita) salicis Cockerell, 1896 | |
| Perdita (Perdita) semicaerulea Cockerell, 1896 | |
| Perdita (Perdita) snellingi Timberlake, 1962 | |
| Perdita (Perdita) sonorensis Cockerell, 1899 | |
| Perdita (Perdita) stathamae Timberlake, 1964 | |
| Perdita (Perdita) subfasciata Cockerell, 1897 | |
| Perdita (Perdita) swezeyi Timberlake, 1958 | |
| Perdita (Perdita) timberlakei Cockerell, 1925 | |
| Perdita (Perdita) tortifoliae Cockerell, 1906 | |
| Perdita (Perdita) triangulifera Timberlake, 1964 | |
| Perdita (Perdita) trimaculata Timberlake, 1960 | |
| Perdita (Perdita) vittata Cockerell, 1923 | |
| Perdita (Perdita) wilmattae Cockerell, 1906 | |
| Perdita (Perdita) yosemitensis Timberlake, 1962 | |
| Perdita (Perdita) zonalis Cresson, 1879 | |
| Perdita (Perditella) cladothricis Cockerell, 1896 | |
| Perdita (Perditella) larreae Cockerell, 1896 | |
| Perdita (Perditella) minima Cockerell, 1923 | |
| Perdita (Procockerellia) albonotata Timberlake, 1954 | |
| Perdita (Pseudomacrotera) turgiceps Timberlake, 1954 | |
| Perdita (Pygoperdita) aureovittata Cockerell, 1916 | |
| Perdita (Pygoperdita) californica Cresson, 1878 | |
| Perdita (Pygoperdita) calochorti Timberlake, 1956 | |
| Perdita (Pygoperdita) cowaniae Timberlake, 1956 | |
| Perdita (Pygoperdita) distropica Timberlake, 1956 | |
| Perdita (Pygoperdita) fieldi Timberlake, 1956 | |
| Perdita (Pygoperdita) interrupta Cresson, 1878 | |
| Perdita (Pygoperdita) leucostoma Timberlake, 1956 | |
| Perdita (Pygoperdita) macrostoma Cockerell, 1922 | |
| Perdita (Pygoperdita) malacothricis Timberlake, 1956 | |
| Perdita (Pygoperdita) micheneri Timberlake, 1956 | |
| Perdita (Pygoperdita) mohavensis Timberlake, 1956 | |
| Perdita (Pygoperdita) montereyensis Timberlake, 1956 | |
| Perdita (Pygoperdita) nevadensis Cockerell, 1896 | |
| Perdita (Pygoperdita) robustula Timberlake, 1956 | |
| Perdita (Pygoperdita) tularensis Timberlake, 1956 | |
| Perdita abdominalis Timberlake, 1960 | |
| Perdita albomaculata Timberlake, 1980 | |
| Perdita amoena Timberlake, 1956 | |
| Perdita amplipennis Timberlake, 1962 | |
| Perdita argenomes | |
| Perdita assimilis Timberlake, 1964 | |
| Perdita atrata Timberlake, 1964 | |
| Perdita bellula Timberlake, 1954 | |
| Perdita bilobata Timberlake, 1956 | |
| Perdita binotata Timberlake, 1954 | |
| Perdita bispinata Timberlake, 1956 | |
| Perdita bohartorum Parker, 1983 | |
| Perdita butleri Timberlake, 1960 | |
| Perdita cephalotes Cresson, 1878 | |
| Perdita chionostoma Timberlake, 1964 | |
| Perdita clypeata Timberlake, 1962 | |
| Perdita coalingensis Timberlake, 1956 | |
| Perdita compta Timberlake, 1964 | |
| Perdita cuspidata Timberlake, 1964 | |
| Perdita dammersi Timberlake, 1964 | |
| Perdita desdemona Portman, 2016 | |
| Perdita dicksoni Timberlake, 1958 | |
| Perdita digressa Timberlake, 1968 | |
| Perdita distans Timberlake, 1962 | |
| Perdita dubia Cockerell, 1896 | |
| Perdita eremophila Timberlake, 1964 | |
| Perdita eriastri Timberlake, 1964 | |
| Perdita euphorbiae Timberlake, 1954 | |
| Perdita excellens Timberlake, 1958 | |
| Perdita exigua Timberlake, 1964 | |
| Perdita exilis Timberlake, 1962 | |
| Perdita falcata Timberlake, 1964 | |
| Perdita fallugiae Timberlake, 1956 | |
| Perdita flavicauda Timberlake, 1960 | |
| Perdita flaviceps Timberlake, 1960 | |
| Perdita flavifrons Timberlake, 1968 | |
| Perdita foleyi Timberlake, 1958 | |
| Perdita frontalis Timberlake, 1968 | |
| Perdita genalis Timberlake, 1964 | |
| Perdita gentilis Timberlake, 1962 | |
| Perdita glabrescens Timberlake, 1962 | |
| Perdita gracilis Timberlake, 1964 | |
| Perdita imberbis Timberlake, 1968 | |
| Perdita innotata Timberlake, 1964 | |
| Perdita inornata Timberlake, 1962 | |
| Perdita interserta Cockerell, 1922 | |
| Perdita jucunda Timberlake, 1962 | |
| Perdita labrata Timberlake, 1962 | |
| Perdita leucophylli Timberlake, 1964 | |
| Perdita leucosticta Timberlake, 1964 | |
| Perdita lucens Timberlake, 1962 | |
| Perdita luculenta Timberlake, 1968 | |
| Perdita mandibularis Timberlake, 1954 | |
| Perdita meconis Griswold, 1993 | |
| Perdita morula Timberlake, 1980 | |
| Perdita mucronata Timberlake, 1956 | |
| Perdita namatophila Timberlake, 1954 | |
| Perdita navarretiae Timberlake, 1958 | |
| Perdita nitens Timberlake, 1956 | |
| Perdita obtusa Timberlake, 1968 | |
| Perdita omani Timberlake, 1964 | |
| Perdita optiva Timberlake, 1954 | |
| Perdita ovaliceps Timberlake, 1964 | |
| Perdita pallida Timberlake, 1954 | |
| Perdita pallidiventris Timberlake, 1962 | |
| Perdita panocheana Timberlake, 1964 | |
| Perdita paroselae Timberlake, 1960 | |
| Perdita plucheae Timberlake, 1960 | |
| Perdita polycarpae Timberlake, 1954 | |
| Perdita propinqua Timberlake, 1964 | |
| Perdita pulliventris Timberlake, 1968 | |
| Perdita pusilla Timberlake, 1964 | |
| Perdita quadrisignata Timberlake, 1956 | |
| Perdita retusa Timberlake, 1960 | |
| Perdita rhondae Griswold, 2010 | |
| Perdita salviae Timberlake, 1964 | |
| Perdita scotti Timberlake, 1958 | |
| Perdita scutellaris Timberlake, 1962 | |
| Perdita sexfasciata Timberlake, 1954 | |
| Perdita socia Timberlake, 1968 | |
| Perdita stephanomeriae Timberlake, 1954 | |
| Perdita subglabra Timberlake, 1971 | |
| Perdita thelypodii Timberlake, 1958 | |
| Perdita thermophila Timberlake, 1962 | |
| Perdita titania Portman & Gr..., 2016 | |
| Perdita trifida Timberlake, 1960 | |
| Perdita vandykei Timberlake, 1956 | |
| Perdita varleyi Timberlake, 1962 | |
| Perdita vesca Timberlake, 1968 | |
| Perdita viridicollis Timberlake, 1971 | |
| Perdita wasbaueri Timberlake, 1960 | |
| Perdita xerophila Timberlake, 1962 | |
| Perdita yanegai Portman, 2016 | |
| Peridita luculenta | |
| Protandrena aristatus | |
| Protandrena heteromorpha Cockerell, 1896 | |
| Pseudopanurgus (Heterosarus) pauper Cresson, 1878 | |
| Pseudopanurgus (Pterosarus) californicus Cresson, 1878 | |
| Pseudopanurgus fraterculus Cockerell, 1896 | |
| Pseudopanurgus pectiphilus Cockerell, 1913 | |
| Pseudopanurgus verticalis Timberlake, 1967 | |
