| 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 | |
| Megandrena (Megandrena) enceliae Cockerell, 1927 | Encelia Megandrena |
