Parastasia montrouzieri is a species of beetle of the family Scarabaeidae. It is found in Papua New Guinea, the Louisiade Archipelago, Australia (Queensland), Indonesia (Aru) and the Solomon Islands.
Description Adults reach a length of about . The head is reddish to dark reddish brown, the pronotum light yellowish brown or brownish orange or brownish red to blackish. The scutellum is as the pronotum, but often somewhat darker, and with the margins darkened. The elytra range from light yellowish brown to brownish orange to brown, mostly with darkened lateral and sutural margins. The underside and legs are reddish brown to dark reddish.
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