12 



size from the first to the middle of August, when they are a little 

 over two inches in length. They vary in color from dull yellow to 

 reddish brown, each segment bearing about six indistinct, transverse 

 black lines, and are marked longitudinally with dark brown stri[)es. 

 In the younger stages, there is a long, slender caudal horn, blackish 

 in color, yellow at the base, but the mature larva has simply a black 

 tubercle surrounded by a yellow ring. The mature larva is repre- 

 sented in the upper part of Fig. 4. 



It is an interesting fact that, while the majority of the larvae of 

 this species answer to the foregoing description, others occur with 

 quite different markings. These have a row of large yellowish green 

 spots on the back and a row of similar, but smaller spots on each 

 side. 



The larva having completed its growth crawls to the ground and 

 constructs for itself a cell in which it transforms to a pupa and in 

 this state it passes the winter. It is not probable that this insect will 

 ever become so abundant as to require any remedy other than hand 

 picking. A small Hymenopterous parasite preys upon the larvae and 

 doubtless does much towards holding them in check. The parasite 

 deposits its eggs on the victim and the young hatching from them, 

 bore into the body and feed there until matured, eventually killing 

 the host. 



