Trochalus aereus is a species of beetle of the family Scarabaeidae. It is found in South Africa (Gauteng, KwaZulu-Natal).
Adults reach a length of about 6âÂÂ8 mm. The upper and lower surfaces are glossy and brown to light brown, the darker parts usually with a metallic sheen. The antennae are yellow. The pronotum is moderately and densely punctate. The elytra have mostly indistinct stripes of punctures, the spaces between these densely and somewhat irregularly punctured.