Pupa
A pupa (plural: pupae or pupas) is part of becoming an adult for some insects, like some butterflies, moths, beetles, flies, and bees. The pupal stage comes after being a larva; the next stage is adulthood.
The pupa stage of a butterfly, called a chrysalis (plural "chrysalids"), is a well-known example of a pupa because they are often found in the open. The pupa stage of a moth, such as the silkworm, is called a cocoon.
Pupa Media
Pupa of the rose chafer beetle, Cetonia aurata
Common crow butterfly (Euploea core) chrysalis illustrating the Ancient Greek origin of the term: χρυσός (chrysós) for gold
Adult Hercus fontinalis, a species of parasitoid wasp, emerging from cocoon
Eclosion of an African swallowtail butterfly (Papilio dardanus)
Luna moth emerging from pupa within silk cocoon
An eclosing Julia butterfly
The tough brown cocoon of an emperor gum moth
An emperor gum moth caterpillar spinning its cocoon
Puparium of the American hoverfly, Eupeodes americanus
Parasitoid wasp Xenomorphia resurrecta inside a fossilized fly puparium, as revealed by X-ray microtomography