Cybister fimbriolatus

Cybister fimbriolatus, the giant diving beetle, is a species of predaceous diving beetle in the family Dytiscidae. It is found in North America and the Neotropics.

Overview
These beetles are active in summer and live in ponds or ditches, feeding on other aquatic arthropods. They are nocturnal but sometimes active during the day. For mating, the males have expanded front feet to help them grab hold of a female.

Subspecies
These two subspecies belong to the species Cybister fimbriolatus:
 * Cybister fimbriolatus crotchi Wilke, 1920
 * Cybister fimbriolatus fimbriolatus (Say, 1825)