The Incomplete metamorphosis has three stages: Egg, Nymph, and Adult
Insects that undergo three stages of change in their life cycle have an incomplete metamorphosis . The first stage is the egg. During this time, the insect will emerge from the shell in a form called nymph.
The nymph is basically a small version of the adult insect. This is very similar to how a child looks like his parents. Nymphs commonly have a thin exoskeleton and have no wings. They eat the same food as their parents and live in the same place as them. When the insects grow, their exoskeleton becomes very narrow and they should replace it.
When the nymph grows larger than its own exoskeleton it goes through a process called moulting where it leaves the old "skin" or exoskeleton behind. The new "skin" will harden and will be the new exoskeleton. This happens many times until the insect finally becomes an adult.
Insects that have a life cycle with incomplete metamorphosis include true bugs, grasshoppers, cockroaches, termites, praying mantis, crickets, and lice. / p>