Posted to get help on genus and possibly species ID. I think it is Cossoninae, but can't make it key to any genus in Arnett (1) that looks right and there aren't any in BugGuide like this specimen in Cossoninae.

Forgive the many images, but thought they might help with the ID.
Partial descriptions that aren't obvious from the pictures.

-- Tarsal claws are 2 and separate, and are simple without any teeth.
-- Tooth at apex of tibia are large (the pictured one is the hind tibia and the tooth is smaller than the others). They are on the apical outside pointing inward.
-- Antennal grooves descending and almost meeting each other, separated like the eyes by a central flat space (the gula?) that extends to the mouth parts.