; class Insecta, order Diptera)
Moderately large family of small flies, of some economic importance as pests of plants. Adults are usually black, yellow-black, or green-black, and almost without bristles. They may be identified by the large, triangular, ocellar plate on the dorsal surface of the head. Males have lost abdominal tergites 7 and 8. The larvae are mainly phytophagous, the exceptions being predacious. 1180 species have been described.
Subjects: Zoology and Animal Sciences.