Insect and Disease Control 231 



Peach-tree bark-beetle (Phloeotribus liminaris) 



This insect is very similar, in many respects, to the fruit- 

 tree bark-beetle, and both the insect and its work may be 

 mistaken for the latter, though there are certain rather 

 characteristic differences. 



Appearance. 



The beetle is slightly less than -^ inch in length, being a 

 very little smaller than the fruit-tree bark-beetle. In color 

 it is light brown to nearly black. 



Distribution. 



This species is more restricted in distribution than the 

 fruit-tree bark-beetle. It is known to occur from New 

 Hampshire w^estward through Ontario, Canada, to Michigan 

 and southward to North Carolina. It may also occur in 

 other sections. Its food-plants appear to be restricted 

 very nearly to peach and cherry trees. 



Life history and habits. 



From the standpoint of control, there are no important 

 differences between this insect in its life history and habits 

 and the fruit-tree bark-beetle. The adults of the former 

 pass the winter in the burrows in trees, while the latter pass 

 the winter in the larval form. 



The brood chambers of the two are characteristically 

 different. That of the fruit-tree bark-beetle runs with 

 the grain of the wood, while that of this species is across 

 the grain of the host. These differences are without impor- 

 tance from the standpoint of control. 



