<Li> Piercing - sucking mouthparts have stylets, and are used to penetrate solid tissue and then suck up liquid food . </Li> <Li> Sponging mouthparts are used to sponge and suck liquids, and lack stylets (e.g. most Diptera). </Li> <Li> Siphoning mouthparts lack stylets and are used to suck liquids, and are commonly found among species of Lepidoptera . </Li> <P> Mandibular mouthparts are found in species of Odonata, adult Neuroptera, Coleoptera, Hymenoptera, Blattodea, Orthoptera, and Lepidoptera . However, most adult Lepidoptera have siphoning mouthparts, while their larvae (commonly called caterpillars) have mandibles . </P>

What is the reason for the variation in size of front versus hind legs