Passalidae
Scientific classification
Kingdom:Animalia
Phylum:Arthropoda
Class:Insecta
Subclass:Pterygota
Superorder:Neoptera
Order:Coleoptera
Family:Passalidae
Genus and species: Popilius disjuctus

Adult: Populus disjuctus from rotting log
Hemingway, South Carolina
Larva: Populus disjuctus from rotting log
Hemingway, South Carolina

The Bessbug is a very large beetle (about 2.5 cm both as adult and larva), that feeds on rotting wood. It has a "horn" on the dorsal anterior.