cocoon
This stage of an insect's life-cycle is called larva.
something
Larva
Larva of the Insect.
It is The larva
There are a couple of ways to kill larva. Though it depends on the insect you can usually kill larva with chlorine.
The larva stage.
it's a freshwater insect
Larva
dragonfly - or any insect form.
egg, larva, pupa, adult
A leatherjacket is the larva of a cranefly.