S2 THE PUPA. 



througli tlie entire state, effected by the movement of tlie 

 abdominal segments solely, but coarctate pupse, or chrysa- 

 lids, are incapable of even the sligbest motion, and ex- 

 hibit no symptoms whatever of animation. 



"We would next consider the extrication of the perfect 

 insect from the -pui^Si case, or the puparium, and from the 

 cocoon. 



This may be considered under two heads, viz : 1st, The 

 state or condition of the pupa when about to moult, and 

 2d, The means by which the insect frees itself from the 

 pupa case and from the cocoon. 



At the period of change the color of the pupa is apt to 

 become more dull and transparent, often to such a degree 

 that the motions of the insect within may be distinguished. 



While the pupa case, however, loses its brilliancy, the 

 beauties of the insect within become more apparent. 



