LOCUSTS, BUTTERFLIES, BEES, WASPS 169 



these there hatch tiny green caterpillars. They eat raven- 

 ously, and grow very fast, shedding their hardened skiiis 

 from time to time so that their bodies may stretch and 

 become larger. In a few weeks the caterpillars become 

 mature. Each one then passes through a great change 

 and becomes transformed into 



a quiescent body known as a 



fwpa. The pupa is encased BanU- 

 in a hard, shiny covering and 

 the whole is called a chrysalis. 

 The chrysalids of some butter- 



„. , ^.. „ , , Fig. 108. — Pupa of butterfly. 



flies are beautifully spangled 



with gold and silver spots, but the chrysalis of the cabbage 

 butterfly is modest in coloring. It is suspended from the 

 cabbage leaf by the tail and by a loose band about the 

 middle (Fig. 108). The pupa lies quietly, eats nothing, 

 and at the end of about ten or twelve days splits open 

 down the back and the adult butterfly crawls out, dries its 

 wings in the sun, and in a httle while flies away in quest 

 of something to eat. 



