Stem Sawflies and Allies

Cephoidea is a small superfamily within the Symphyta, commonly referred to as stem sawflies, containing some 100 species in 10 genera in a single family, Cephidae. Most species occur in the Northern Hemisphere, especially in Eurasia. The larvae are stem borers in various plants, especially grasses, but sometimes other herbaceous plants, shrubs, or trees. A few are pests of cereal grains (e.g. Cephus cinctus, which attacks wheat). They are exceptionally slender for symphytans, often resembling other...