Length: 7-10 mm
Members of this genus are extremely flattened, an adaptation to their habitat: the tight-fitting bark of recently killed trees. They are typically, though not always, found on Tulip Poplar. Some of the interesting features of these beetles are the pincers at the front of the head, and the short elytra that leave much of the abdomen exposed.
These beetles prey on tiny insects and other denizens of the under-bark world.
It is quite common for these beetles to have mites on and near them, as does the beetle in the photo above. The mites do not feed on the beetle, but may use the beetle to provide transportation to food they do like to eat.
American Insects site