"...and I won't hazard a guess at the species without studying the specimen. It looks like it belongs in the flightless western species group. These are generally rarely collected, but there are lots of localized species and lots of potential for undescribed species also. We just don't have enough materials available to really work them up. So we need to keep collecting them. However, the flightless Stenotothorax species seem to be locally abundant, mostly winter active and nocturnal. In the last couple years, we've collected them walking (running?) on sand dunes at night with temperatures down to 40° F. Another fellow produced a small series on snow banks at night. Some species seem to associate with rodent nests and burrows, some sand dwellers may focus on various detritus build-ups around 'dunes'. Barrier pitfall traps can help collect them, but nothing beats hand collecting a good beetle on a cold winter night!"

Moved from Aphodiine Dung Beetles.

Looks like one of the Stenotothorax (on BugGuide, a subgenus of Aphodius).