56 PRACTICAL TREE REPAIR 



two long, just under the bark, and along the sides 

 of it, rather close together, it deposits the eggs. 



From Circular 144, Bureau of Entomology 

 Brood galleries of the hickory bark beetle on surface of wood 



The young grubs strike out and excavate narrow 

 but widening galleries at right angles to the pri- 

 mary burrow or radiating from it. They hiber- 

 nate in these galleries, pupate in spring, and issue 



