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Revision of the Narctic Parathalassius Mik (Diptera: Dolichopodidae), with a review of the world fauna
By Brooks, Scott E. and Jeffrey M. Cumming
Zootaxa 4314, 2017
"The Nearctic species of Parathalassius Mik are revised and the world species are reviewed. Twelve species are recorded from the Nearctic Region including nine new species: P. abela sp. nov., P. aldrichi Melander, P. candidatus Melander, P. dilatus sp. nov., P. infuscatus sp. nov., P. melanderi Cole, P. midas sp. nov., P. sinclairi sp. nov., P. socali sp. nov., P. susanae sp. nov., P. uniformus sp. nov., and P. wheeleri sp. nov. Lectotype designations are made for P. aldrichi Melander and P. melanderi Cole. A key to the 15 world species is provided and the distributions of the Nearctic species are mapped. COI mitochondrial DNA barcode sequences were obtained for 12 species of Parathalassius. A morphological phylogenetic analysis of the included species is presented and known ecological information is summarized."

Review of the mydid genus Opomydas Curran (Diptera: Mydidae)
By Kondratieff B., Fitzgerald S.J.
Ann. Ent. Soc. Am. 89: 348-353, 1996

A revision of the North American flies belonging to the genus Rhaphiomidas (Diptera, Apioceridae)
By Mont A. Cazier
Bulletin of the American Museum of Natural History, 182(2), pp. 181-263, 1985
The Full Text (PDF) can be downloaded from:

This is a useful reference treating the 23 taxa known at the time (among them a number of subspecies). Keys and detailed descriptions are given, as well as distributions, habitat, and other info of interest.

A more recent key, treating some additional species described after 1985, can be found in the 2010 paper by Van Dam(1). Note that while Cazier considered Rhaphiomidas as a genus within the family Apioc

A new species and key for Rhaphiomidas Osten Sacken (Diptera: Mydidae)
By Van Dam M.H.
Zootaxa 2622: 49-60, 2010

New Species of the Genus Nemotelus from the Western United States (Diptera: Stratiomyidae)
By Hanson, WJ
Journal of the Kansas Entomological Society Vol. 36, No. 3, pp. 133-146, 1963
full text (requires at least a free JSTOR account)

contains a key to the species the subgenus Camptopelta found in America north of Mexico

Taxonomic revision of the robber-fly genus Leptopteromyia Williston, 1907 [poster presentation]
By Cohen C.
2014 ESA Annual Meeting, 2014

Revision of the Nearctic Thereva (Diptera: Asiloidea: Therevidae)
By Holston K.C., Irwin M.E.
Studia Dipterologica, Supplement 13: 1-223, 2005

The Nearctic genus Nebritus Coquillett (Diptera: Therevidae: Therevinae)
By Donald W. Webb & Michael E. Irwin
Proceedings of the Entomological Society of Washington, Volume 93, Number 4, pp. 899-913, 1991
This is a very complete paper reviewing the nearctic species of Nebritus. It can be freely read online at this BHL link.

A key to the 3 nearctic species appears on pg. 901, and their detailed descriptions follow, together with range maps and numerous line drawings for each species.

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