106 



METAMORPHOSES OF INSECTS. 



is usually furnished with mandibles and jaws, whatever may be 

 the form that it will afterwards assume ; and we often see the 

 iirst of those orgins serving for locomotion, as well as for seizing 



FIG. 429. LAEVA, FCPA, AND IMAGO OF fAPirio MACHACN. 



the food. These Larvae also differ in their form, and are some- 

 times known under the name of Caterpillars, sometimes under 

 that of Worms. After having remained in this state for a 

 longer or shorter time, and experienced several changes of skin, 

 the wings begin to be formed beneath the skin, and the animal 

 passes into the state of a pupa or chrysalis. During the whole 

 length of this second period of their existence, these singular 

 animals cease to take any food, and remain motionless. Some- 

 times the skin of the larva, which in this case is never changed, 

 dries up, and forms a kind of oval case, in the interior of which 

 they remain shut up ; sometimes they are only covered by a 



