A review of the south american two-winged flies of the family syrphidae - Shannon, Raymond C.
Sobretiro de: Proceedings U. S. National Museum 70 (2658): 1-33 Encuadernado con: Notes on american two-winged flies of the family sapromyzidae/by J. R. Malloch 74-57
Keywords: Dípteros Syrphidae