Sephisa princeps is a species of butterfly of the family Nymphalidae. It was described by Johann Heinrich Fixsen in 1887. It is found in the Russian Far East (Amur, Ussuri), north-eastern China and Korea. The habitat consists of oak forests.
Adults are on wing from July to August.
The larvae feed on Quercus mongolica.[1] Larvae of first two instars live gregariously. There are a total of five instars.[2]