Thermonectus basillaris

Thermonectus basillaris is a species of diving beetle native to the eastern United States, southern Ontario, Canada, and Cuba. T. basillaris is a pioneering species that occurs in temporary ponds and readily fly. Adults are 8.1 to 10.7 millimetres (0.32 to 0.42 in) long and 4.7 to 5.9 millimetres (0.19 to 0.23 in) wide.