1. Eupolyphaga sinensis, hermaphrodite, male with wings and female without wings. The female insect is about 3cm long, flat from top to bottom, black and shiny. The head is small and bends towards the abdomen. The mouth is chewy and the jaw is hard. Compound eyes are developed and kidney-shaped; One eye and two. Antennas are filiform, long and knotted. The chest is shield-shaped, narrow at the front and wide at the back, covering the head. The male's chest is wavy, notched and has two pairs of wings. ? 2. Eupolyphaga sinensis, the female body is wide and oval, wider than Eupolyphaga sinensis. The surface of the insect is dark and dull, not as flat as the bright body of the Eupolyphaga sinensis. There are reddish-brown or yellowish-brown edges on the front edge of the chest backboard and around the body. There are dense small granular protrusions on the back of the body, and there are no wings. The male worm has wings and a gray-black body. There are no fine markings on other parts of the body except for the obvious light-colored wide edge at the front edge of the front chest backboard.

Sting insect