@article {243,
	title = {The cephalopharyngeal apparatus of syrphid larvae and its relationship to other Diptera},
	journal = {Proceedings of the Zoological Society of London},
	volume = {141},
	year = {1963},
	pages = {261-280},
	keywords = {cephalopharyngeal apparatus, larva, Syrphidae},
	author = {Hartley, J.C.}
}
@article {242,
	title = {A Taxonomic account of the larvae of some British Syrphidae},
	journal = {Proceedings of the Zoological Society of London (Reprinted)},
	volume = {136},
	number = {Part 4},
	year = {1961},
	month = {June 1961},
	pages = {505-573},
	author = {Hartley, J.C.}
}
