dense but short - Macropis (7).
Posterior legs slender; polliniferous
hair on femora, tibiæ, and plantæ
dense and very long - Dasypoda (8).
Three submarginal cells to the wings.
Abdomen truncated at base - Colletes (1).
Abdomen ovate.
Abdomen entire at apex; maxillary
palpi as long or longer than
the maxillæ - Andrena (4).