These animals or beetles include insects that have a holometabola metamorphosis. Holometabola is an insect that undergoes perfect metamorphosis.
Stages of insect cycle that undergo perfect metamorphosis are eggs and then become larvae and pupa to become imago.
Larvae are young animals of different forms and their nature from adults. A cocoon is a cocoon where at that time the insects do not perform the activity, at that time also occur refinement and the formation of organs. Imago is an adult phase or a natural breeding phase.