Nests of Centris, Melissodes, and Colletes in Guatemala (Hymenoptera: Apoidea)

Abstract

An uncommon interspecific dense aggregation of nests constructed by the solitary bees Centris transversa, C. anthracina, Melissodes floris, Colletes sp., and Anthophora sp. occupied a steep bank in Guatemala. The nests, cells, provisions, and brood of the first four species are described and illustrated for the first time. A Centris inquiline was Coelioxys sp. (Megachilidae); Melissodes females were parasitized by phorid flies.