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Chloropidae (frit flies, grass flies, stem flies; 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.

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