Insects may have complete or incomplete (simple) metamorphosis. The life cycle of insects with complete metamorphosis includes egg, larva, pupa, and adult. Eggs hatch to give rise to a worm-like larva ...

The larval molts are called instars. The mature larva forms a prepupa, and then a pupa, which undergo metamorphosis to produce the adult. Existing in both grub-like and winged forms allows the fly ...