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Andrena albihirta (Ashm.) 35
Andrena aliciae Robertson 2
Andrena alienoides (Vier.) 1
Andrena alleghaniensis Vier. 11
Andrena andrenoides Cresson 8
Andrena angustitarsata Vier. 4
Andrena anisochlora Ckll. 12
Andrena arabis Robertson 4
Andrena argentata Smith 2
Andrena armata Gmelin 4
Andrena asteris Rbt. 20
Andrena astragali Vier. & Ckll. 4
Andrena atypica (Ckll.) 2
Andrena auricoma Smith 13
Andrena barbara Baus. & Lab. 1
Andrena barbilabris Kirby 4
Andrena batava Per. 3
Andrena bicolor Fabr. 5
Andrena bisalicis Viereck 6
Andrena braccata Viereck 1
Andrena beuthinii Schenk 2
Andrena bradleyi Vier. 39
Andrena caerulea 49
Andrena caliginosa Viereck 1
Andrena callopyrrha Ckll. 2
Andrena calrata Fab. 4
Andrena carlini Cockerell 120
Andrena carliniformis V. & C. 25
Andrena canadensis Dalla-Torre 44
Andrena candida Smith 10
Andrena candidiformis V. & C. 4
Andrena carolina Viereck 4
Andrena ceanothi Vier. 101
Andrena ceanothifloris Linsley 2
Andrena cerasifolii Ckll. 12
Andrena chalybea (Cresson) 2
Andrena chlorogaster Viereck 2
Andrena chlorosoma Linsley & McSwain 1
Andrena commoda Smith 21
Andrena chrysosceles (Kby.) 2
Andrena cineraria (L.) 3
Andrena clarkella (Kirby) 1
Andrena cleodora (Vier.) 2
Andrena confederata Viereck 1
Andrena sp. nr. costillensis V. & C.
Andrena crataegi Robertson 197
Andrena cressonii Robertson 57
Andrena cristata Viereck 40
Andrena cryptanthae Timberlake 2
Andrena cupreotincta Ckll. 4
Andrena distans Provancher 11
Andrena dunningi Cock. 16
Andrena durangoensis V. & Ckll.
Andrena erecta Viereck 2
Andrena erigeniae Rbts. 44
Andrena errans Smith 2
Andrena erythrogaster (Ashm.) 39
Andrena erythroni Robertson 73
Andrena flavipes Panzer 1
Andrena flores (Fabr.) 3
Andrena forbesii Rbt. 63
Andrena fragilis Smith 87
Andrena frigida Smith 5
Andrena fulvago (Chr.) 2
Andrena gardineri Ckll. 2
Andrena geranii Rbt. 35
Andrena haemorrhoa (F.) 8
Andrena helianthi Robertson 4
Andrena helianthiformis (V. & C.) 1
Andrena helvola (L.) 2
Andrena hattorfiana Fabr. 3
Andrena hicksi Cockerell 1
Andrena hilaris Smith 6
Andrena hippotes Robertson 3
Andrena hirticincta Prov. 68
Andrena hurdi Lanham (Paratypes) 3
Andrena illinoensis Rbt. 28
Andrena imitatrix Cress. 40
Andrena integra Smith 13
Andrena jacobi Perk. 2
Andrena knuthiana Ckll. 7
Andrena krigiana Rbt. 7
Andrena lata Viereck 11
Andrena lewisii Cockerell 1
Andrena mandibularis Rbt. 5
Andrena mariae Rbt. 12
Andrena medionitens Cock. 1
Andrena melanochroa Cock. 4
Andrena melliventris Cress. 3
Andrena milwaukeensis Graen 3
Andrena mimetes Cockerell 3
Andrena minuta parvula Illiger 2
Andrena minutula (Kirby) 3
Andrena miranda Smith 28
Andrena miserabilis Cress. 158
Andrena moesticolor V. & C. 1
Andrena mitis Schmkn. 1
Andrena nasonii Rbt. 28
Andrena nigrae Robertson 2
Andrena nigriceps (Kirby) 4
Andrena nigrifrons (Cress.) 4
Andrena nigroaenea Kirby 2
Andrena nigrocaerulea Ckll. 19
Andrena nivalis Smith 19
Andrena nubecula Smith 17
Andrena nuda Rbt. 1
Andrena ovatuls Kirby 2
Andrena pallidifovea (Viereck) 7
Andrena pallidiscopa trifasciata Timblk. & Ckll. 1
Andrena papagorum V. & C. 7
Andrena perarmata Cockerell 5
Andrena perimelas Cockerell 3
Andrena perplexa Smith 48
Andrena persimulata Viereck 5
Andrena personata Robertson 1
Andrena piperi Viereck 9
Andrena placata Mitch. 49
Andrena placida Smith 15
Andrena plana Viereck 2
Andrena polemonii Robertson 9
Andrena porterae Cock. 8
Andrena praecox (Scopoli) 1
Andrena pruni Roberston 1
Andrena prunorum Cock. 29
Andrena pubescens Ol. 4
Andrena pyrrhacita Ckll. 1
Andrena quintilis Rbt. 1
Andrena regularis Malloch 9
Andrena rhodotricha Linsley 6
Andrena ribifloris V. & C. 1
Andrena robertsonii D.T. 32
Andrena rudbeckiae Rbt. 14
Andrena ruforum Nyl. 2
Andrena rugosa Rbt. 33
Andrena saccata 4
Andrena salicifloris Ckll. 3
Andrena salictaria Robertson 22
Andrena sayi Robertson 2
Andrena semi-punctata Ckll. 2
Andrena sericea (Chv.) 2
Andrena sigmundi Cock. 65
Andrena simplex Smith 20
Andrena sola Viereck 2
Andrena striatifrons Ckll. 6
Andrena suavis Timberlake 16
Andrena subaustralis Ckll. 23
Andrena subopaca Nyl. 2
Andrena subtilis Smith 12
Andrena thaspii Graen. 5
Andrena thaspiiformis Viereck 7
Andrena topazana Cockerell 6
Andrena transnigra Viereck 3
Andrena tridens Robertson 1
Andrena vaga Panzer 4
Andrena vandykei 39
Andrena verna Mitchell (Paratypes) 4
Andrena vicina Smith 163
Andrena vierecki Cockerell 8
Andrena viole Robertson 2
Andrena virginiana Mitch. 8
Andrena washingtoni Cockerell 1
Andrena wellesleyana Robertson 15
Andrena sp. nr. washingtoni Cock. 34
Andrena wilkellis (Kirby) 138
Andrena wilkellis scripta Viereck 4
Andrena ziziae Robertson 1
Andrena spp. 9
Calliopsis andreniformis Smith 111
Calliopsis chlorops Cockerell 2
Calliopsis coloradensis Or. 14
Calliopsis coloritipes Ckll. 1
Calliopsis spp. 7
Nomadopsis scitula (Cresson) 1
Nomadopsis zebrata (Cresson) 4
Nomadopsis spp. 1
Oxaea sp. 2
Panurginus cressoniellus Ckll. 1
Panurgus banksianus (Kirby) 2
Panurgus calcaratus (Scop.) 1
Panurgus dentipes Lepeletier 6
Perdita bequaerti Vier. indianensis Cock. 7
Perdita bruneri Cockerell 3
Perdita ignota crawfordi Ckll. 2
Perdita octomaculata (Say) 6
Perdita sexmaculata Cockerell 1
Perdita sphaeralceae Ckll. 1
Perdita zebrata Cresson 2
Perdita spp. 7
Psaenythia spp. 11
Pseudopanurgus spp. 40
Pterosarus nebrascencis nebrascencis (Crawford) 24
Undetermined Andrenidae