106 



METAMORPHOSES OF INSECTS. 



nished with mandibles and jaws, whatever may be the form that 

 it will afterwards assume ; and wr often see the first of these 

 organs serving for locomotion, as well as for seizing the food. 



FIG. 329. LARVA, PUPA, AND IMAGO OF PAPILIO MACHAOX. 



These Larvae also differ in their form, and are sometimes known 

 under the name of Caterpillars^ sometimes under that of Worms. 

 After having remained in this state for a longer or shorter time, 

 and having experienced several changes of skin, the wings begin to 

 be formed beneath the skin, and the animal passes into the state of 

 chrysalis. During the whole length of this second period of their 

 existence, these singular animals cease to take any food, and re- 

 main motionless. Sometimes the skin from which they have last 

 freed themselves, dries up, and forms a kind of oval case, in the 

 interior of which they remain shut up ; sometimes they are only 



