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Photo#385760
Bib2

Bib2
Zebra Canyon, Garfield County, Utah, USA
March 28, 2010
Size: 1mm
This is the maximum possible resolution with my equipment.

Images of this individual: tag all
Bib2 Bib2 Bib2 Bib2

Moved

Moved
Moved from Bibionomorpha.

Moved
Moved from ID Request.

Lighting
The resolution is adequate but the features are in shadow. The bright part at top is causing the rest to be underexposed.

After brightening the image I think I see an eye bridge, a single row of facets connecting the two compound eyes. I also think I see a tibial spur, which according to Arnett rules out the gall midges. (But I'm not confident in Arnett's handling of wingless gnats.)

Can you check with your eye under a scope to see if there is an eye bridge, tibial spurs, and 2 or 3 ocelli?

Likely options assuming tibial spurs are
(1) 1-segmented palp, no eye bridge = Sciaridae, probably Pnyxia, possibly Epidapus
(2) 1-segmented palp, 1-facet eye bridge = Sciaridae:Epidapus
(3) 2-3 segmented palp, 2-3 facet eye bridge = Sciaridae:Bradysia

I think I see a 2-segmented palp and a 1-facet eye bridge, which does not compute.

If it completely lacks tibial spurs it probably belongs in Lestremiinae.

For now they can go to Bibionomorpha.

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