Some díptera (microdon) from nests of ants /
by T. D. A. Cockerell and Hazel Andrews
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Sobretiro de: Proceedings U. S. National Museum 51 (2141): 53-56, 1916. Encuadernado con: Notes on american two-winged flies of the family sapromyzidae/by J. R. Malloch 74-59