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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » Orthorrhapha » Asiloidea » Mydas Flies (Mydidae) » Leptomydinae » Nemomydas » Nemomydas venosus
Photo#1278900
Unkown 'Bug' - Nemomydas venosus - male
Copyright © 2016 Clifford Powell

Unkown 'Bug' - Nemomydas venosus - Male
Sand Ranch 30 miles east of Roswell, Chaves County, New Mexico, USA
August 20, 2016
Area is sand hills with scrub oak. Only specimen noticed.

Would appreciate an ID.
TIA
Cliff - - -
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Contributed by Clifford Powell on 20 August, 2016 - 3:08pm
Last updated 17 April, 2017 - 7:37am

Moved
Moved from Leptomydinae.
… Aaron Schusteff, 17 April, 2017 - 12:58am login or register to post comments

ID
So, I guess this is Pseudonomoneura hirta female?
… Clifford Powell, 20 August, 2016 - 10:34pm login or register to post comments

 
Nope...it's a male of the "dark phase" of Nemomydas venosus
In this subfamily (Leptomydinae), females have terminalia with a conspicuous "circlet" of small black spines...whereas yours has the groupings of more angularly-fluted protuberances associated with males.

And of the two genera we have in this subfamily, this is Nemomydas rather than Pseudonomoneura (as the antennal club is longer than the 1st flagellomere).

This goes to N. venosus in the key for males in Hardy(1950), and agrees well with most of its description therein (except the 1st posterior cell in your photo appears to end in R1 rather than the wing margin). It is also consistent with the treatment for that species in Kondratieff & Welch(1990), where both a "light phase" and a "dark phase" are discussed. This is presumably the "dark phase".

There are many records of it from New Mexico.

Interesting that the "black" of the tergites actually appears to be a rich (and somewhat "metallic") very dark green in your photo. What a beautiful mydid...nice shot, and find!!
… Aaron Schusteff, 17 April, 2017 - 12:55am login or register to post comments

Moved
Moved from ID Request.
… John F. Carr, 20 August, 2016 - 7:40pm login or register to post comments

Neomydas?
… john and jane balaban, 20 August, 2016 - 3:51pm login or register to post comments

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