Cimbicidae (suborder Symphyta, superfamily Tenthredinoidea) Family of moderate- to large-sized (18–25 mm long) symphytans which resemble hairless bumble-bees. The antennae possess seven or fewer segments and are slightly clubbed. The larvae feed on elm, willow, poplar, hawthorn, etc. and can be serious pests of trees. They may be recognized by their greenish-yellow colouring, with black spiracles and a dorsal stripe. The larvae of many species can eject an offensive secretion from glands just above the spiracles. Cimbicidae occur in Europe and N. America.
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