The Larva (Caterpillar) Stage:

The caterpillar is an "eating machine". It spends its whole life eating and getting bigger. It gets bigger by splitting its old skin down the back and crawling out in its new skin. It has six eyes, a mouth, six real legs on its thorax, and four pairs of prolegs (false legs) on its abdomen. It spins a silk thread as it moves to help keep it attached to the leaves. After two weeks the caterpillar spins a silk button on the underside of a leaf and hangs head down in a J shape. The pupa is formed in the body of the caterpillar after twenty-four hours. The caterpillar's skin splits along its back and exposes the pupa.