Elmomorphus jii is a species of beetle of the family Dryopidae. This species is found in China (Hunan).
Adults reach a length of 3.72 mm (males) and 4.05âÂÂ4.13 mm (females). Their body is oval, moderately convex dorsally and integument black. The mouthparts, antennae, and legs are reddish brown.
The species name honours Prof. Lanzhu Ji, a Chinese entomologist who collected the holotype.