Maechidius sougb is a species of beetle of the family Scarabaeidae. It is found in Indonesia (Irian Jaya), where it occurs in primary mid-montane rainforests at about 2200 meters altitude.
Adults reach a length of about 9.70-10.05 mm. The dorsum and venter are uniformly dark castaneous, while the labroclypeus, mouthparts and legs are somewhat paler reddish brown.
The species is named after Sougb, the local name of one of the main tribes and languages in the Anggi Lakes area of the Arfak Mountains.