@article {571,
	title = {Key to the Nearctic species of <i>Criorhina</i> (Diptera: Syrphidae)},
	year = {1957},
	pages = {4},
	address = {unpublished key},
	keywords = {Criorhina, Diptera, Eristalinae, Key to species, Syrphidae},
	author = {Vockeroth, J.R.}
}
