@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}
}
@article {1263,
	title = {Material for a monograph on the Diptera fauna of New Zealand. Part II, family Syrphidae},
	journal = {Transactions and Proceedings of the Royal Society of New Zealand},
	volume = {53},
	year = {1921},
	pages = {289-333},
	keywords = {Platycheirus (Eocheilosia), Platycheirus (Eocheilosia) ronana (Miller)},
	url = {http://rsnz.natlib.govt.nz/volume/rsnz_53/rsnz_53_00_003830.html},
	author = {Miller, D.W.}
}
@article {2853,
	title = {Notes on some Australian Syrphidae (Diptera)},
	journal = {The Australian Zoologist},
	volume = {2},
	year = {1921},
	pages = {12-18},
	author = {Hardy, G. H.}
}
@article {361,
	title = {The genitalia of male Syrphidae, their morphology, with especial reference to its taxonomic significance},
	journal = {Annals of the Entomological Society of America},
	volume = {14},
	year = {1921},
	note = {pp. 169-214 + 11 pp. plates},
	pages = {169-225},
	keywords = {GENITALIA, morphology, Syrphidae, taxonomy},
	author = {Metcalf, C.L.}
}
