A pupa (Latin pupa for doll, pl: pupae or pupas) is the life stage of some insects undergoing transformation. The pupal stage is found only in holometabolous insects, those that undergo a complete metamorphosis, going through four life stages; embryo, larva, pupa and imago. (For a list of such insects see Holometabolism).
The pupae of different groups of insects have different names such as chrysalis in the Lepidoptera order and tumbler in the mosquito family. Pupae may further be enclosed in other structures such as cocoons, nests or shells.
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