@inbook {1103,
	title = {Diptera Americae septentrionalis indigena. Description H. Loew.},
	booktitle = {Diptera Americae septentrionalis indigena},
	volume = {Centuria quinta},
	year = {1864},
	pages = {49-104},
	publisher = {Berliner entomologische Zeitschrift},
	organization = {Berliner entomologische Zeitschrift},
	chapter = {8},
	address = {Berolini, typis A.W. Schadii},
	url = {http://www.biodiversitylibrary.org/bibliography/9606},
	author = {Loew, H.}
}
@inbook {1244,
	title = {Diptera Americae septentrionalis indigena. Description H. Loew.},
	booktitle = {Diptera Americae septentrionalis indigena},
	volume = {Centuria quarta},
	year = {1863},
	pages = {275-326},
	publisher = {Berliner Entomologische Zeitschrift},
	organization = {Berliner Entomologische Zeitschrift},
	chapter = {7},
	address = {Berolini, typis A.W. Schadii},
	url = {http://www.biodiversitylibrary.org/bibliography/9606 ; http://www.biodiversitylibrary.org/bibliography/46202},
	author = {Loew, H.}
}
@article {2421,
	title = {Descriptions of Nearctic Diptera},
	journal = {The Canadian Entomologist},
	volume = {59},
	year = {1927},
	pages = {79-92},
	keywords = {Parhelophilus, Parhelophilus brooksi Curran},
	author = {Curran, C. Howard}
}
@article {518,
	title = {Keys to Nearctic Syrphidae (Diptera)},
	year = {1991},
	pages = {88},
	address = {unpublished keys},
	author = {Thompson, F. C.}
}
@article {521,
	title = {The genus <i>Pleskeola</i> Stackelberg (Diptera: Syrphidae), a junior synonym of <i>Parhelophilus</i> Girschner},
	journal = {Proceedings of the Entomological Society of Washington},
	volume = {99},
	number = {4},
	year = {1997},
	pages = {628-640},
	address = {Washington},
	abstract = {The genus Pleskeola (n. syn.) is synonymized with Parhelophilus. The species (porcus and sibiricus, n, comb.) associated with the name Pleskeola are redescribed. A checklist and key to species of Parhelophilus is presented. Four new synonyms and one new combination are reported (Helophilus anniae Brimley 1923 = flavifacies Bigot 1883; Parhelophilus obscurior Violovitsh 1960 and Helophilus citricornis Shiraki 1968 = kurentzovi Violovitsh 1960; Parhelophilus currani Fluke 1953 = laetus Loew 1863; Helophilus pilosus Hunter 1897 is transferred to Lejops (Lejops)).},
	keywords = {Diptera, Parhelophilus, Pleskeola, Syrphidae},
	author = {Thompson, F. Christian}
}
