Maechidius ciliatus is a species of beetle of the family Scarabaeidae. It is found in Papua New Guinea, where it occurs in lowland rainforests.
Adults reach a length of about 6 mm. The dorsum is uniformly black-brown with brown labroclypeus, antennae, legs and venter.
The species name is derived from Latin cilium (meaning cilia) and refers to its apically ciliate parameres.