Length: 10-15 mm
Ceruchus piceus is a reddish-brown to black species in which the antennae are not elbowed.
In this species, only males boast the sizeable mandibles. In males the mandibles are the length of the head, while in females the manibles are one-half the length of the head or less.
Larvae develop in decaying hardwoods, including beech, birch, elm, and oak among others.
American Insects site