Eucoilinae

Eucoilinae is the largest subfamily within the wasp family Figitidae (Cynipoidea), comprising nearly 1000 described species in over 80 genera. They are small to minute parasitoid wasps that are endoparasitoids of cyclorrhaphous dipteran larvae. Eucoilines are recognized by the presence of a distinctive raised and often sculptured plate or cup on the dorsal surface of the scutellum (the mesoscutellum).

== Taxonomy and systematics == Eucoilinae has historically been treated as a separate family (Eucoilidae) by some authors, but recent phylogenetic analyses have consistently placed it as a subfamily within an expanded concept of Figitidae. It is considered part of the "core figitids," a clade that also includes the subfamilies Pycnostigminae, Emargininae, Aspicerinae, and Figitinae, all of which are parasitoids of Diptera.