sawfly

(-flī′)

noun pl. sawflies

any of various four-winged hymenopteran insects (esp. families Tenthredinidae and Cimbicidae): the abdomen of the female is provided with a pair of sawlike organs that cut into plants, the eggs being then deposited in the cuts

See sawfly in American Heritage Dictionary 4

noun
Any of various hymenopterous insects, chiefly of the family Tenthredinidae, the females of which have sawlike ovipositors used for cutting into plant tissue to deposit their eggs.

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