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Brown/red. 11-segmented antennae, with the second antennomere reduced. Antennomere 3 equal in length to the first and second antennomeres. Is a sizable beetle, can grow up to 5 centimeters in length. The sides of the prothorax have spikes.
This is a ferocious-looking beetle, I wouldn't put my fingers near its mandibles, it can probably give a good pinch. This is the only species in its genus in North America.