Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Subgenus Pachyconops

Wasp-like fly - Physoconops excisus Possible Ceriini Syrphid Flies - Physoconops gracilis - male - female Thick-headed Fly - Physoconops Conopidae- Thick-headed flies, ID Please - Physoconops excisus - female ?bee or fly - Physoconops - female Fly to ID - Physoconops floridanus - female thick-headed fly Physoconops? - Physoconops excisus - female Physoconops excisus? - Physoconops excisus - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Sciomyzoidea
Family Conopidae (Thick-headed Flies)
Subfamily Conopinae
Genus Physoconops
No Taxon Subgenus Pachyconops
7 species in our area(1)(2):
  Physoconops (Pachyconops) brachyrhynchus (Macquart) 1843
  Physoconops (Pachyconops) bulbirostris (Loew) 1853
  Physoconops (Pachyconops) excisus (Weidemann) 1830
  Physoconops (Pachyconops) floridanus Camras 1955
  Physoconops (Pachyconops) gracilis (Williston) 1885
  Physoconops (Pachyconops) townsendi Camras 1955
  Physoconops (Pachyconops) weemsi Camras(2) 2007
From pg. 161 of Camras (1955) and the MND(3), the subgenus Pachyconops is distinguished by:
    1) 3rd antennal segment relatively slender, more than 2/3 the length of the 2nd antennal segment;
    2) frons shorter than wide; vertex small, much shorter than frons;
    3) dark pattern in posterior cell, if present, relatively wide.
Similar to the subgenus Physoconops, but having the front shorter than wide, and having antennal segment 3 about equal to segment 2. The triangular polished space on the posterior margin of the eye is very small or absent.
From (1):
  P. brachyrhynchus: WY to MA, s. to NM and FL
  P. bulbirostris: IN to NJ, s. to TX and FL
  P. excisus: CO to NY, s. to OK and FL
  P. floridanus: FL, NC (and NJ(2))
  P. gracilis: CA to CO, s. to TX and Mexico
  P. townsendi: CA, AZ, NM, TX
  P. weemsi(2): FL, GA
Remarks on New World Physoconops subgenus Pachyconops can be found in Camras (1955) starting on pg. 161. A key to species appears at the end of that paper, on pg. 184.
For hyperlinks to original detailed descriptions, check the BugGuide "Info" tab page for each individual species (look under the "Synonyms and other Taxonomic Changes" section).
Print References
Camras, Sidney (1955). "A Review of the New World Flies of the Genus Conops and Allies (Diptera: Conopidae)", Proc. U. S. Nat. Mus., Vol. 105, pp. 155-187 (Full Text)
Works Cited
1.A Catalog of the Diptera of America North of Mexico
Alan Stone, et al. 1965. United States Department of Agriculture.
2.A new conopid fly from Florida and Georgia (Diptera: Conopidae)
Sidney Camras. 2007. Insecta Mundi 0007: 1-4.
3.Manual of Nearctic Diptera Volume 2
Varies for each chapter; edited by J.F. McAlpine, B.V. Petersen, G.E. Shewell, H.J. Teskey, J.R. Vockeroth, D.M. Wood. 1987. Research Branch Agriculture Canada.