4] 
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. 39.—Work of Agrilus sinuatus, 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. 
