Adults reach a length of about 5.5-7.25 mm. The head, prothorax and scutellum are black and very shining. The elytra is as black as the prothorax, or has a large basal reddish patch on each side, which often invades the wholesurface. The abdomen is reddish and the pectus is piceous-red. The antennae are occasionallybrownish in the male, but almost always flavescent in the female. The punctures of the whole head are moderately closely set and the prothorax is very faintly aciculate in the male, but finely punctate in the female. The elytra have somewhat seriate rows of shallow punctures.