Charles D. Michener, "A Review of the American Bees of the Genus Macropis (Hymen., Apoidea)", Psyche: A Journal of Entomology, vol. 45, Article ID 049645, 3 pages, 1938. https://doi.org/10.1155/1938/49645
A Review of the American Bees of the Genus Macropis (Hymen., Apoidea)
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