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Sawflies of trees and shrubs

Sawflies are a group of insects related to wasps and bees, but they don't sting. Their name is derived from the saw-like ovipositor the adult female uses to lay eggs. The larval stages are defoliators of many species of trees and shrubs, and they have 6 or more prolegs on their abdomens rather than 2 to 5 as do caterpillars. Prolegs are fleshy and located behind the 3 pairs of jointed legs on the thorax. Winter is spent as pupae or prepupae in the soil. An Extension Service publication--Sawflies of Trees and Shrubs, FO-6703-C, l996, with colored photos, describes some of Minnesota's more common sawflies.