Hercules Beetle (Dynastes hercules), a gigantic lamellicorn beetle from tropical America, sometimes 6 inches in length. The male bears on the thorax an enormous horn, which is met by a shorter upturned horn from the head, the whole resembling a pair of large but somewhat unequal pincers, of which the body of the insect is the handle. The female is without horns, and decidedly smaller. Another species, D. titigus, about 2 inches in length, occurs in the United States. The genus Megasoma is nearly allied to Dynastes. See also GOLIATH BEETLE.