Bu!. 48, Div. of Entomology, U. S. Dept. of Agriculture. 



Plate XI 



Fig. 3. Fig. 4. 



Work of the Pine Destroying Beetle of the Black Hills Porest Reserve. 



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 Adjoining tree not attacked.— Fig. 4. Dead tree: outer bark removed by woodpeckers. 

 (From Bui. 32. n. s., Div. of Entomology, U. S. Dept. of Agriculture.) 



