use pupa in a sentence.
This time it forms a stiff, white cover and is called a pupa (PYOO-puh).
This time it forms a stiff, white cover and is called a pupa PYOO-puh.
The pupa of the gnat  also has 'respiratory trumpets' serving the same purpose, but these are a pair of processes on the prothorax, so that the pupa, which is fairly active, hangs from the surface-film with its abdomen pointing downwards through the water.
The name "pupa" or doll, was given to the creature in this stage, because long ago people thought the way in which insects are thus enclosed was somewhat like the way in which the babies used to be wrapped round in bandages or "swaddling clothes": it is also called a "chrysalis," because sometimes dotted with gold or pearly spots.
At last it really seems tired of eating, and after it has cast its skin four times, the fifth one becomes thick and hard, and the caterpillar hangs itself by a fine silken thread of its own spinning to a twig, and passes into its second stage -- that of the "pupa," or chrysalis, from which it will awaken, a thing of life and beauty, to live in the air instead of crawling.