any of about 170 species of insects that are delicate, are yellow or brown in colour, have biting mouthparts, and feed on dead plant material. Most species are from 4 to 7 mm (about 0.2 inch) long. Most males have two pairs of narrow wings and are weak fliers, whereas all females are wingless. Webspinners have short, stout legs and run rapidly both forward and backward
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