Maechidius crypticus is a species of beetle of the family Scarabaeidae. It is found in Papua New Guinea, where it occurs in lower montane rainforests at about 1220 meters altitude.
Adults reach a length of about 6.5 mm. They are nearly identical to Maechidius lapsus, Maechidius owenstanleyi and Maechidius pauxillus.
The species name is derived from Greek úÃÂàÃÂÃÂÃÂà(meaning cryptic) and refers to its strong external similarity to several Papuan congeners.