Cecidomyiinae

thumb|Asphondylia solidaginis thumb|Rhopalomyia solidaginis thumb|Vitisiella larva thumb|Galls of Dasineura pellex on leaf of ash tree ([[Fraxinus)]]

The Cecidomyiinae, commonly known as gall midges or gall gnats, is the largest subfamily in Cecidomyiidae with over 600 genera and more than 5000 described species. Larvae of the other (basal) cecidomyiid subfamilies feed on fungi; whereas this subfamily is best known for its members that induce galls on plants. However, there are also many species of Cecidomyiinae that are fungivores, parasitoids, or predators as maggots.