Peritrichia hessei is a species of beetle of the family Scarabaeidae. It is found in South Africa (Western Cape, Northern Cape).
Adults reach a length of about . They are black or pitch-black. The rear of the elytra is strongly rounded and white-edged in both males and females, but the colour of the elytra is different, being black in males and coffee-brown in females. There are no transverse bands on the elytra, as in related species.