Epomis nigricans is a species of ground beetle native to the Palearctic. It is known from China, Japan, North Korea, and South Korea. Adult beetles are metallic copper-green colored, with a striking yellow-orange rim on the elytra and mostly yellow-colored legs and antennae. They are 19.5-22 millimeters in length. by making prey-like movements. The adult beetles are generalist predators, but can also feed on amphibians much larger than themselves.