B.YMENOPTERA— Continued. 



BOMBUS BOMBUS BOMBUS BOMBOS BOMBUS BOMBUS 



sylvicola, y (B) occidentals, cf occidentalis, 9 occidentalis, y occidentalis, 8 (B) centralis, tf 

 Kirb. Greene. Greene. Greene. Greene. Cress. 



BOMBUS BOMBUS 



centralis, 9 centralis, y 

 Crest. Cress. 



BOMBUS 

 centralis, y (B) 

 Cress. 



BOMBUS 

 lacustris, cf 

 Cress. 



BOMBUS 

 lacustris, 9 

 Cress. 



BOMBUS 

 lacustris, y 

 Crest. 



BOMBUS 

 lacustris, y (B) 

 Cress. 



A |>:illui. 



APATHUS 

 laboriosus, cf 

 Fao. 



APATHUS 

 laboriosus, 9 

 Fab. 



APATHUS 



Ashtoni, cf 

 Cress. 



APATHUS 



Ashtoni. 9 



Cress. 



APATHUS 



elatus, cf 

 Fab. 



APATHUS 

 elatus, 9 

 Fab. 



APATHUS 



citrinus, cf 



Smith. 



APATHUS 



citrinus, 9 



Smith. 



APATHUS 



insularis, cf 

 Cress. 



APATHUS 



insularis, 9 



Cress. 



ANDREIVIUJE. 



Authophora. 



ANTHOPHORA 

 terminalis, cf 

 Cress. 



ANTHOPHORA 

 canadensis, 9 

 Cress. 



MELISSODES 

 aurigenia, 9 

 Cress. 



ANTHOPHORA 



terminalis, 9 

 Cress. 



ANTHOPHORA 

 bomboides, cf 

 Kirby. 



ANTHOPHORA 

 bomboides, 9 

 Kirby. 



ANTHOPHORA 

 canadensis, cf 

 Cress. 



ANTHOPHORA 

 abrupta, cf 

 Say. 



ANTHOPHORA 

 abrupta, 9 

 Say. 



ITleli*so«le*. 



MELISSODES 

 aurigenia, cf 

 Cress. 



MELISSODES 



dentiventris, cf 



Smith. 



MELISSODES 



dentiventris, 9 



Smith. 



MELISSODES MELISSODES 

 desponsa, cf desponsa, 9 

 Smith. Smith. 



MELISSODES 

 rustica, cf 

 Say. 



MELISSODES 

 rustica, 9 

 Say. 



MELISSODES 

 pennsylvanicus, cf 

 St. Farg. 



MELISSODES 

 pennsylvanicus, 9 

 St. Farg. 



MELISSODES 

 obliqua, cf 



Say. 



MELISSODES 

 obliqua, 9 

 Say. 



Eucrra. EUCERA 



inula, cf 

 Prov. 



EUCERA 

 nuda, 9 

 Frov. 



Anurena. 



ANDRENA 

 bicolor, cf 

 Fab. 



ANDRENA 



bicolor, 9 

 Fab. 



ANDRENA 

 hilaris, cf 

 Smith. 



ANDRENA 

 hilaris, 9 

 Smith. 



ANDRENA 

 nivalis, rf 

 Smith. 



ANDRENA 

 nivalis, 9 

 Smith. 



ANDRENA 



hirticeps, 9 



Smith. 



ANDRENA 

 frigida, cf 

 Smith. 



ANDRENA 

 placida, cf 

 Smith. 



ANDRENA 

 frigida, 9 

 Smith. 



ANDRENA 

 vicina, cf 

 Smith. 



ANDRENA 

 placida, 9 

 Smith. 



ANDRENA 

 algida, cf 

 Smith. 



ANDRENA 

 vicina, 9 

 Smith. 



ANDRENA 



hirticeps, cf 



Smith. 



ANDRENA ANDRENA ANDRENA 



algida, 9 perplexa, cf perplexa, 9 



Smith. Smith. Smith. 



ANDRENA 

 integra, cf 

 Smith. 



ANDRENA 

 integra, 9 

 Smith. 



ANDRENA 



simplex, cf 



Smith. 



ANDRENA 



simplex, 9 

 Smith. 



ANDRENA 



miserabilis, cf 

 Cress. 



ANDRENA 

 miserabilis, 9 

 Cress. 



Ilalictu*. HALICTUS HALICTUS HALICTUS HALICTUS HALICTUS HALICTUS 



coriaceus, cf coriaceus, 9 ligatus, cf ligatus, 9 distinctus, <f distinctus, 9 



Smith. Smith. Say. Say. Prov. Prov. 



HALICTUS HALICTUS HALICTUS HALICTUS HALICTUS HALICTUS HALICTUS 



6-cinctu8, cf 6-cinctus, 9 scabrosus, cf scabrosus, 9 discus, cf discus, 9 pllosus, cf 



Prov. Prov. Prov. Prov. Smith. Smith. Smith. 



HALICTUS 



pilosus, 9 

 S?nith. 



HALICTUS 

 lsevissimus, cf 

 Smith. 



HALICTUS 



lsBvissimus, 9 

 Smith. 



HALICTUS 



albitarsis, cf 



Cress. 



HALICTUS 

 albitarsis, 9 

 Cress. 



HALICTUS 

 parallelus, cf 

 Say. 



HALICTUS 

 parallelus, 9 

 Say. 



HALICTUS 

 constrictus, <f 

 Prov. 



HALICTUS 

 constrictus, 9 

 Prov. 



HALICTUS 



confusus, cf 



Smith. 



HALICTUS 



confusus, 9 



Smith. 



HALICTUS 

 ontariensis, cf 

 Prov. 



HALICTUS 

 ontariensis, 9 

 Prov. 



Agaposteinoii. 



AGAPOSTEMON 

 tricolor, cf 

 Lepell. 



AGAPOSTEMON 

 tricolor, 9 

 Lepell. 



AGAPOSTEMON 

 radiatus, cf 

 Say. 



AGAPOSTEMON 

 radiatus, 9 

 Say. 



Pauurgu*. 



PANURGUS 

 vernalis, cf 

 Prov. 



PANURGUS 



vernalis, 9 

 Prov. 



PANURGUS 

 aestivalis, cf 

 Prov. 



PANURGUS 



asstivalis, 9 

 Prov. 



PANURGUS 

 8-maculatus, cf 

 Say. 



PANURGUS 



8-maculatus, 9 

 Say. 



Augochloi-a. 



AUGOCHLORA 



radiata, cf 

 Say. 



AUGOCHLORA 



radiata, 9 

 Say. 



AUGOCHLORA 

 pura, cf 

 Say. 



AUGOCHLORA 

 pura, 9 

 Say. 



Osniia. 



OSMIA 

 albiventris, cf 

 Cress. 



OSMIA 

 albiventris, 9 

 Cress. 



OSMIA 

 lignaria, cf 

 Say. 



OSMIA 

 lignaria, 9 

 Say. 



OSMIA 

 simillima, cf 

 Smith. 



OSMIA 

 simillima, 9 

 Smith. 



OSMIA 



lignicola, cf 

 Prov. 



OSMIA 

 lignicola, 9 

 Prov. 



OSMIA 



albitarsis, cf 

 Cress. 



OSMIA 

 albitarsis, 9 

 Cress. 



OSMIA 

 bucconis, cf 

 Say. 



OSMIA 

 bucconis, 9 

 Say. 



OSMIA OSMIA OSMIA 



texana, cf texaua, 9 frigida, cf 

 Cress. Cress. Smith. 



OSMIA 

 frigida, 9 

 Smith. 



OSMIA 

 lignivora, cf 

 Pack. 



OSMIA 

 lignivora, 9 

 Pack. 



OSMIA 

 atriventris, cf 

 Cress. 



