This is the only species in the genus Paracyphononyx in the U.S.
New image with pointers to diagnostic characters. Really I think that's the only reason to have ugly pinned insects in the guide. I apologize that it looks amateurish, but I do the best I can with what I can afford.

Key:
1-Fully exposed labrum (in fully dry pinned specimens sometimes partly hidden under the clypeus)
2-Long malar space (space between mandible and lower edge of eye), at least as long as antennal pedicel.
3-Females lack a "true" tarsal comb.
4-Compressed, hairy sixth sternite (similar to, but definitely not the same as, Ceroplaes).