41 



with a brown head, and the segment next to the head much enlarged. 

 In spring the larva resumes feeding and makes broader burrows than 

 in the first year. In late summer or early fall, when full fed, it 

 bores about one-fourth inch into the wood, and there forms an elon- 



FiG. S9. — Work of Affrilus sinuatiis, reduced. (Smith.) 



gate cell parallel with the bark and connected to the outside by an 

 exit hole. Within this cell it winters, pupates in April, and the 

 beetle issues in May or June. It thus takes about two years to reach 

 maturity. 



