Elmomorphus longitarsis is a species of beetle of the family Dryopidae. This species is found in Thailand.
Adults reach a length of 2.93âÂÂ3.09 mm (males) and 3.15âÂÂ3.32 mm (females). Their body is oblong oval and integument black, while the mouthparts, antennae and tarsi are reddish-brown.
The species name is Latin and refers to the long tarsi.