Microsternus tricolor is a species of pleasing fungus beetle in the family Erotylidae. It is endemic to China, Taiwan, Russia and Japan.
The species' name comes from Greek and Latin, "tricolor" meaning "three colors".
Microsternus tricolor are 3 to 5 mm long and 1.4 to 2.4 mm wide. It has three colors as the name suggests, those being red, orange/yellow and black. These beetles have a punctured, close pronotum and orange and black bands of elytra.
Microsternus tricolor was discovered by Lewis in 1887.