proleg

…larvae have “false legs” (prolegs or pseudopods) similar to those that support the fleshy abdomen of a caterpillar. Flies, much more versatile in this respect than caterpillars, can have prolegs around any body segment. Prolegs help the larvae crawl through narrow spaces or push through soil.

…pair of fleshy appendages called prolegs, which may be homologous with the primitive segmental appendages. Each proleg has one or two curved rows of minute hooklets and an eversible soft end, the planta. The crochets on the prolegs allow the larva to hold onto surfaces. Body fluids forced into the…