Pupa (pū′pȧ), plural Pupæ (pū′pē), stage between larva and adult in the metamorphosis of an insect. The pupa of butterflies is often called the chrysalis or chrysalid. Some insects pass the pupa-stage in silken cocoons, safe from weather and enemies; some undergo change in a case made of a variety of materials; others pass through transformation in a rolled-up leaf. Pupæ do not eat; some have no power of motion whatever; others merely squirm when disturbed. When the transformation is complete, the shell is parted and the perfect insect comes forth. See Metamorphosis. Consult Cragin's Our Insect Friends.