Bul. 32, New Series, Div. of Entomology, U.S. Dept. of Agriculture. PLATE VII. 
Fic. 1.—SMALL FRESHLY ATTACKED PINE TREE, SHOWING Fic. 2.—MARKS OF PRIMARY GALLERIES ON 
PITCH TUBES. THE SURFACE OF WOOD WHEN BARK IS 
REMOVED. 
Fic. 3.—FRESHLY ATTACKED TREE, SHOWING PITCH TUBES. Fic. 4.—DeEAD TREE; OUTER BARK REMOVED 
ADJOINING TREE NOT ATTACKED. BY WOODPECKERS. 
SCENES IN THE PINE FORESTS OF THE BLACK HILLS FOREST RESERVE. 
