The "femur bulging at base" character of Physocephala is unmistakable in the image above. And, though it's hard to make out in the 560 x 560 pixel image that most BugGuide visitors can see, it's easy to verify that the crossvein r-m is well beyond the middle of the discal cell in the full-size version of your dorsal image in this series.

The infuscated discal cell, conspicuous yellow humeral spots, and red scutellum, confirm this is P. sagittaria...and other characters consistent with that ID are visible elsewhere (i.e. the central yellow spot of the cheek and dark facial groove).

The mostly dark brown abdomen (with thin, yellow, apical bands) and mostly dark thorax indicate affinities with the dark form of P. sagittaria that Loew called P. genualis.

I think it may be a female though...there's a vague intimation of a thickened wedge attached to the 5 sternite that could be a theca.

Moved from Physocephala.