58 



ing of" the skin is similar to this, and is 

 attended with great pain to them, and in 

 which they often are observed to die. 

 Afiter the third and last changing the 

 caterpillar comes to perfection, at which 

 time it is beautiful to appearance. 



Fig. 6. shews a fidl grown caterpillar 

 of the largest kind afiter the last chang- 

 ing, nearly two inches and a half long ; 

 they are not all of this length, especially 

 if they have not had sufficient fresh 

 food. 



I shall now describe this full grown 

 caterpillar more fully : A caterpillar con- 

 sists in general of the head, neck, and 

 body. The head is, as in most species of 

 this class, prominent and heart-shaped, 

 divided in the middle downwards, so 

 that it forms a triangle towards the 

 mouth; from the mouth are two points 

 going out, which some call the man- 

 dibles. The head as well as the neck are 

 covered with many yellow protuberances 

 which render these parts somewhat shin- 

 ing. Tiie body consists often segments, 

 besides the last terminal part. On the 

 5 



