An uncommon interspecific dense aggregation of nests constructed by the solitary bees Centris tramversa, C. anthracina, Meliuodes floris, Cotletes 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); Meliuodes females were parasitized by phorid flies.
Batra, Suzanne W. T. and Schuster, J. C., "Nests of Centris, Melissodes, and Colletes in Guatemala (hymenoptera: Apoidea)" (1977). Ba. Paper 101.
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