A Taxonomic Revision of Canadian Non-Osmia Osmiini (Hymenoptera Megachilidae)

The Osmiini (Hymenoptera: Megachilidae) is a tribe whose species encompass much of the biological diversity seen among bees (Michener 2007), and is one that contains many polytypic species in several genera. I use a molecular approach to taxonomy to test current morphological assessments of species-level diversity in the group, and herein examine all polytypic Canadian non-Osmia osmiine species. The analyses resulted in several taxonomic considerations in both the Ashmeadiella and Atoposmia groups. In addition, I present an up-to-date revision of Canadian non-Osmia Osmiini (Hymenoptera: Megachilidae). A key to the seven genera of Canadian Osmiini is provided and the 29 species of Canadian non-Osmia Osmiini are keyed, in dichotomous format for each genus, with all key features illustrated and full redescriptions of all species provided. Summaries of biogeographic distributions and life histories are included for each genus and its Canadian species.