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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Acalyptratae" » Sciomyzoidea » Thick-headed Flies (Conopidae) » Conopinae » Physocephala » marginata or texana (Physocephala marginata or texana)
Photo#1402209
Thick-headed fly - physocephala - Physocephala
Copyright © 2017 Stoil Ivanov

Thick-headed fly - physocephala - Physocephala
Illinois Beach State Park, Lake County, Illinois, USA
July 11, 2017
Size: 12mm
I think its either Physocephala sagittaria or marginata
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Contributed by Stoil Ivanov on 12 July, 2017 - 2:43am
Last updated 12 December, 2021 - 10:58am

Moved
Moved from Physocephala.
… Zachary Dankowicz, 12 December, 2021 - 10:58am login or register to post comments

Species possibilities
Nice find. It's either P. marginata or P. texana. (Note that P. sagittaria has a solidly infuscated discal cell.)

To conclusively determine which of the two this is, one needs to see the facial grooves...see "fg" in labelled image below:

 

The facial grooves are dark in P. marginata (and P. sagittaria); but they are pale in P. texana. The ranges of both species include your general area.
… Aaron Schusteff, 16 August, 2017 - 11:28pm login or register to post comments

 
Thanks for the info . Unfortu
Thanks for the info . Unfortunately don't have other picture in the future will know
… Stoil Ivanov, 17 August, 2017 - 2:14am login or register to post comments

 
Just bumped into this again
I still can't determine whether it's texana vs. marginata...but wanted to say it's a splendid photograph! :-)
… Aaron Schusteff, 25 August, 2017 - 10:33pm login or register to post comments

Moved
Moved from ID Request.
… v belov, 12 July, 2017 - 4:25am login or register to post comments

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