Trochalus aerugineus is a species of beetle of the family Scarabaeidae. It is found in South Africa (Western Cape, Eastern Cape, KwaZulu-Natal, Mpumalanga, Limpopo).
Adults reach a length of about 6âÂÂ8 mm. They have a completely ferruginous-red or dark bronze, ovate and very convex, elongate-ovate or elongate body, with the head green and the elytra reddish, or completely bronze-green, shining and not iridescent. The antennae are flavous.