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| Andrena accepta Viereck, 1916 | 2 |
| Andrena aerifera LaBerge, 1967 | 0 |
| Andrena aeripes LaBerge, 1967 | 0 |
| Andrena afimbriata LaBerge, 1967 | 0 |
| Andrena agilis Smith, 1879 | 0 |
| Andrena alamonis Viereck, 1916 | 0 |
| Andrena alceae LaBerge, 1985 | 0 |
| Andrena aliciarum Cockerell, 1897 | 0 |
| Andrena aliena Smith, 1853 | 0 |
| Andrena alleghaniensis Viereck, 1907 | 3 |
| Andrena amarilla Cockerell, 1949 | 0 |
| Andrena anatolis Linsley & MacSwain, 1961 | 0 |
| Andrena andrenoides (Cresson, 1878) | 0 |
| Andrena ardis LaBerge, 1967 | 0 |
| Andrena arenicola LaBerge & Ribble, 1972 | 0 |
| Andrena argemonis Cockerell, 1896 | 0 |
| Andrena asteris Robertson, 1891 | 0 |
| Andrena asteroides Mitchell, 1960 | 4 |
| Andrena atlantica Mitchell, 1960 | 3 |
| Andrena atypica (Cockerell, 1941) | 0 |
| Andrena auripes LaBerge, 1967 | 0 |
| Andrena avulsa LaBerge & Ribble, 1972 | 0 |
| Andrena baeriae Timberlake, 1941 | 0 |
| Andrena banksi Malloch, 1917 | 5 |
| Andrena barbara Bouseman & LaBerge, 1978 | 7 |
| Andrena berkeleyi Viereck & Cockerell, 1914 | 0 |
| Andrena bilimeki LaBerge, 1967 | 0 |
| Andrena bisalicis Viereck, 1908 | 3 |
| Andrena biscutellata Viereck, 1917 | 0 |
| Andrena blaisdelli Cockerell, 1924 | 0 |
| Andrena boronensis Linsley & MacSwain, 1962 | 0 |
| Andrena brevicornis Bouseman & LaBerge, 1978 | 0 |
| Andrena brevipalpis Cockerell, 1930 | 1 |
| Andrena bullata LaBerge, 1967 | 0 |
| Andrena candida Smith, 1879 | 0 |
| Andrena capricornis Casad & Cockerell, in Cockerell, 1896 | 0 |
| Andrena cerasifolii Cockerell, 1896 | 0 |
| Andrena chlorura Cockerell, 1916 | 0 |
| Andrena commoda Smith, 1879 | 3 |
| Andrena confederata Viereck, 1917 | 6 |
| Andrena coruscata LaBerge, 1977 | 0 |
| Andrena crataegi Robertson, 1893 | 3 |
| Andrena crawfordi Viereck, 1909 | 0 |
| Andrena cressonii cressonii Robertson, 1891 | 0 |
| Andrena cressonii kansensis Cockerell, 1899 | 0 |
| Andrena cryptanthae Timberlake, 1951 | 0 |
| Andrena cyanosoma (Cockerell, 1916) | 0 |
| Andrena cybele Gribodo, 1894 | 0 |
| Andrena dallasiana Cockerell, 1910 | 0 |
| Andrena dapsilis LaBerge, 1971 | 0 |
| Andrena declinis LaBerge, 1977 | 0 |
| Andrena decolorata LaBerge & Thorp, 2005 | 0 |
| Andrena deppeana Cockerell, 1910 | 0 |
| Andrena dimorpha Mitchell, 1960 | 0 |
| Andrena discreta Smith, 1879 | 0 |
| Andrena dolomellea Lanham, 1949 | 0 |
| Andrena dreisbachorum LaBerge, 1967 | 0 |
| Andrena escondida Cockerell, 1938 | 0 |
| Andrena faceta LaBerge, 1986 | 0 |
| Andrena fastuosa Smith, 1879 | 0 |
| Andrena fenningeri Viereck, 1922 | 5 |
| Andrena flaminea LaBerge, 1971 | 0 |
| Andrena flexa Malloch, 1917 | 0 |
| Andrena flocculosa LaBerge & Rib. | 0 |
| Andrena forbesii Robertson, 1891 | 5 |
| Andrena fracta Casad & Cockerell, in Cockerell, 1896 | 0 |
| Andrena fulminea LaBerge, 1967 | 0 |
| Andrena fulminoides LaBerge, 1967 | 0 |
| Andrena fulvipennis Smith, 1853 | 7 |
| Andrena fumosa LaBerge, 1967 | 0 |
| Andrena furva Linsley & MacSwain, 1961 | 0 |
| Andrena fuscipennis LaBerge & Bouseman, 1970 | 0 |
| Andrena gardineri Cockerell, 1906 | 9 |
| Andrena hastulata LaBerge, 1985 | 0 |
| Andrena haynesi Viereck & Cockerell, 1914 | 0 |
| Andrena helianthiformis Viereck & Cockerell, 1914 | 0 |
| Andrena hilaris Smith, 1853 | 3 |
| Andrena hippotes Robertson, 1895 | 4 |
| Andrena hirticeps Smith, 1853 | 0 |
| Andrena hondurasica Cockerell, 1949 | 0 |
| Andrena humeralis LaBerge, 1967 | 0 |
| Andrena ilicis Mitchell, 1960 | 5 |
| Andrena illini Bouseman & LaBerge, 1978 | 6 |
| Andrena illinoiensis Robertson, 1891 | 3 |
| Andrena imitatrix Cresson, 1872 | 1 |
| Andrena impolita LaBerge, 1987 | 0 |
| Andrena inculta LaBerge, 1967 | 0 |
| Andrena jessicae Cockerell, 1896 | 0 |
| Andrena kraussi Michener, 1954 | 0 |
| Andrena krigiana Robertson, 1901 | 2 |
| Andrena latinensis Donovan, 1977 | 0 |
| Andrena layiae Timberlake, 1951 | 0 |
| Andrena lepidii Ribble, 1968 | 0 |
| Andrena levigata LaBerge, 1967 | 0 |
| Andrena limatula LaBerge, 1967 | 0 |
| Andrena linsleyi Timberlake, 1937 | 0 |
| Andrena livida LaBerge, 1977 | 0 |
| Andrena mackieae Cockerell, 1937 | 0 |
| Andrena macoupinensis Robertson, 1900 | 6 |
| Andrena macra Mitchell, 1951 | 3 |
| Andrena macrocephala Cockerell, 1916 | 0 |
| Andrena malacothricidis Thorp, 1969 | 0 |
| Andrena mandibularis Robertson, 1892 | 0 |
| Andrena manifesta (Fox, 1894) | 0 |
| Andrena mariae Robertson, 1891 | 1 |
| Andrena mellea Cresson, 1868 | 0 |
| Andrena melliventris Cresson, 1872 | 0 |
| Andrena mesillae Cockerell, 1896 | 0 |
| Andrena mexicana LaBerge, 1967 | 0 |
| Andrena micheneri Ribble, 1968 | 0 |
| Andrena micheneriana LaBerge, 1978 | 0 |
| Andrena miniata LaBerge, 1985 | 0 |
| Andrena miserabilis Cresson, 1872 | 5 |
| Andrena monilicornis Cockerell, 1896 | 0 |
| Andrena monticola LaBerge, 1967 | 0 |
| Andrena moquiorum Viereck & Cockerell, 1914 | 0 |
| Andrena morrisonella Viereck, 1917 | 2 |
| Andrena nasonii Robertson, 1895 | 6 |
| Andrena neonana Viereck, 1917 | 0 |
| Andrena nida Mitchell, 1960 | 10 |
| Andrena nigra Provancher, 1896 | 0 |
| Andrena nigrae Robertson, 1905 | 3 |
| Andrena nigrifrons (Cresson, 1878) | 0 |
| Andrena nothoscordi Robertson, 1897 | 0 |
| Andrena nubecula Smith, 1853 | 4 |
| Andrena nuda Robertson, 1891 | 3 |
| Andrena obscuripennis Smith, 1853 | 0 |
| Andrena oenotherae Timberlake, 1937 | 0 |
| Andrena ofella LaBerge, 1967 | 0 |
| Andrena optanda LaBerge, 1967 | 0 |
| Andrena osmioides Cockerell, 1916 | 0 |
| Andrena pachucensis Donovan, 1977 | 0 |
| Andrena pallidifovea Viereck, 1904 | 0 |
| Andrena palpalis Timberlake, 1951 | 0 |
| Andrena parachalybea Viereck, 1917 | 0 |
| Andrena parilis LaBerge, 1967 | 0 |
| Andrena pecosana Cockerell, 1913 | 0 |
| Andrena pectidis (Cockerell, 1897) | 0 |
| Andrena perimelas Cockerell, 1905 | 0 |
| Andrena perplexa Smith, 1853 | 4 |
| Andrena perpunctata LaBerge, 1967 | 0 |
| Andrena personata Robertson, 1897 | 5 |
| Andrena piperi Viereck, 1904 | 0 |
| Andrena plebeia LaBerge, 1985 | 0 |
| Andrena praecox (Scopoli, 1763) | 8 |
| Andrena prima Casad, in Cockerell, 1896 | 0 |
| Andrena primulifrons Casad, 1896 | 0 |
| Andrena principalis LaBerge, 1986 | 0 |
| Andrena pruni Robertson, 1891 | 3 |
| Andrena prunorum Cockerell, 1896 | 6 |
| Andrena prunorum prunorum Cockerell, 1896 | 0 |
| Andrena prunorum sinaloa Viereck, 1926 | 0 |
| Andrena puthua (Cockerell, 1910) | 0 |
| Andrena quadrilimbata LaBerge, 1977 | 0 |
| Andrena rava LaBerge, 1967 | 0 |
| Andrena reflexa Cresson, 1872 | 0 |
| Andrena repanda LaBerge, 1967 | 0 |
| Andrena rodilla Donovan, 1977 | 0 |
| Andrena rozeni Linsley & MacSwain, 1955 | 0 |
| Andrena rubens LaBerge, 1967 | 0 |
| Andrena rubi Mitchell, 1960 | 0 |
| Andrena rudbeckiae Robertson, 1891 | 2 |
| Andrena sagittagalea Ribble, 1968 | 0 |
| Andrena salictaria Robertson, 1905 | 3 |
| Andrena sayi Robertson, 1891 | 0 |
| Andrena scotoptera Cockerell, 1934 | 0 |
| Andrena sculleni LaBerge, 1967 | 0 |
| Andrena senticulosa LaBerge, 1967 | 0 |
| Andrena simplex Smith, 1853 | 1 |
| Andrena simulata Smith, 1879 | 0 |
| Andrena sitiliae Viereck, 1909 | 0 |
| Andrena sodalis Smith, 1879 | 0 |
| Andrena sola Viereck, 1916 | 0 |
| Andrena solivaga LaBerge, 1967 | 0 |
| Andrena subaustralis Cockerell, 1898 | 0 |
| Andrena subchalybea Viereck, 1916 | 0 |
| Andrena surda Cockerell 1910 | 0 |
| Andrena tegularis LaBerge, 1967 | 0 |
| Andrena texana Cresson, 1872 | 0 |
| Andrena toluca LaBerge, 1969 | 0 |
| Andrena tonkaworum Viereck, 1917 | 0 |
| Andrena toralis LaBerge & Ribble, 1972 | 0 |
| Andrena trapezoidea Viereck, 1917 | 0 |
| Andrena trimaculata LaBerge, 1967 | 0 |
| Andrena triquestra LaBerge, 1985 | 0 |
| Andrena unicostata LaBerge, 1971 | 0 |
| Andrena uyacensis Cockerell, 1949 | 0 |
| Andrena vandykei Cockerell, 1936 | 0 |
| Andrena verbesinae Viereck & Cockerell, 1914 | 0 |
| Andrena verecunda Cresson, 1872 | 0 |
| Andrena vicina Smith, 1853 | 7 |
| Andrena vidalesi Cockerell, 1949 | 0 |
| Andrena vidalesi panamensis Michener, 1954 | 0 |
| Andrena vidalesi vidalesi Cockerell, 1949 | 0 |
| Andrena vinnula LaBerge & Hurd, 1965 | 0 |
| Andrena violae Robertson, 1891 | 0 |
| Andrena viridissima Ribble, 1968 | 0 |
| Andrena vulpoides LaBerge, 1967 | 0 |
| Andrena wilkella (Kirby, 1802) | 7 |
| Andrena yaquiorum Viereck, 1917 | 0 |
| 179 |