Maechidius hamatus is a species of beetle of the family Scarabaeidae. It is found in Indonesia (Irian Jaya), where it occurs in mid-montane rainforests at about 2050 meters altitude.
Adults reach a length of about 7.10âÂÂ7.90 mm. The dorsum is uniformly black-brown, while the labroclypeus, mouthparts, antennae, legs and most of the venter are reddish brown.
The species name is derived from Latin hamatus (meaning hooked) and refers to the curved denticles of male protarsomeres 1 and 2.