A revision of the bees of the subgenus Epinomia in the New World (Hymenoptera-Halictidae)

This is the first of two papers dealing with the systematics and geographical variation of the New World members of the subgenus E7)inomia Ashmead. It contains a revision of the subgenus and includes information on distribution, geographical variation, and flower preferences of its species. About 1500 specimens were examined.