Bui. 32, New Series, Div. of Entomology, U. S. Dept of Agricultuie. 



Plate VII. 



Fig. 1. — Small freshly attacked Pine Tree, showing 

 Pitch Tubes. 



Fig. 2. — Marks of primary Galleries on 

 the Surface of Wood when Bark is 

 removed. 



Fig. 3. — Freshly attacked Tree, showing Pitch Tubes. Fig. 4. — Dead Tree ; outer Bark removed 



Adjoining Tree not attacked. by Woodpeckers. 



Scenes in the Pine Forests of the Black Hills Forest Reserve. 



