Shannon, Raymond C. The crysotoxine syrphid-flies / by Raymond C. Shannon - Sobretiro de: Proceedings U. S. National Museum 69 (2637): 1-20 Encuadernado con: Notes on american two-winged flies of the family sapromyzidae/ by J. R Malloch 74-58 LCCN: 201756 Subjects--Topical Terms: DÃpteros Syrphidae Crysotozum Dewey Class. No.: PA-C 595.77 D5