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Fly - Poecilosomella angulata

Fly - Poecilosomella angulata
Houston, Harris County, Texas, USA
April 21, 2007
Size: ~4 mm
Near some dog poop. Only got this shot before it flew away.

My guess
Would be family Ephydridae!

It is
Poecilosomella angulata in the family Sphaeroceridae. - Chen

Thanks for the help, Gerard and Chen.