gall gnat


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Noun1.gall gnat - fragile mosquito-like flies that produce galls on plantsgall gnat - fragile mosquito-like flies that produce galls on plants
dipteran, dipteron, dipterous insect, two-winged insects - insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing
Hessian fly, Mayetiola destructor - small fly whose larvae damage wheat and other grains