@article {437,
	title = {Keys to Palaearctic Syrphidae (Diptera) for Genera Sphegina, Zelima, Penthesilea, and Neoascia},
	year = {1956},
	pages = {29},
	address = {unpublished keys},
	keywords = {Diptera, Key to species, Neoascia, Palaearctic, Penthesilea, Sphegina, Syrphidae, Zelima},
	author = {Stackelberg, A.A.}
}
@article {222,
	title = {The Myoleptini of the Americas (Diptera, Syrphidae)},
	journal = {American Museum Novitates},
	volume = {1758},
	number = {March 8},
	year = {1956},
	pages = {1-23},
	address = {New York},
	keywords = {keys, Myoleptini, Syrphidae},
	author = {Fluke, C. L. and Weems, Howard V. Jr.}
}
