ON LARVJE. 89 



larvse, when about to enter the pupa state, prepare 

 for that change by the construction of complicated 

 cocoons, and by many other preparatory arrange- 

 ments, the result of their peculiar instincts, must 

 form the subject of the next Chapter, in which I 

 intend to give some account of the pupa stage of 

 insect life. 



