isosoma

from The Century Dictionary.

• noun A genus of hymenopterous insects of the family Chalcididæ and subfamily Eurytominæ, containing plant-feeding forms furnishing an exception to the rule in this parasitic family. I. hordei is known as the joint-worm fly.
• noun A genus of Elateridæ or click-beetles, containing one species, I. elateroides, from the Caucasus.
• noun An insect which belongs to the genus Isosoma.