Cecidomyiidae (sometimes spelled Cecidomyidae) is a family of flies (order Diptera) known as gall midges or gall gnats. As the name implies, the larvae of most gall midges feed within plant tissue, creating abnormal plant growths called galls. Cecidomyiidae are very fragile small insects usually only 2–3 mm in length; many are less than 1 mm lon...