@article {141,
	title = {Revision of the Pipiza group of the family Syrphidae (Flower-flies) from north of Mexico},
	journal = {Proceedings of the California Academy of Sciences},
	volume = {11},
	number = {16},
	year = {1921},
	month = {December 31, 192},
	pages = {345-393},
	keywords = {Nearctic, Pipiza, Revision, Syrphidae},
	author = {Curran, C. Howard}
}
