Bui. 39, Biological Survey, U. S. Dept. of Agriculture. 
Plate X. 
Work of Sapsucker on Hickory and Oak. 
[1. Near view of a swollen girdle on mocker nut, 2. Radial section through a girdle showing 
iron streaks. 3. Cross section: checks and iron streaks. 4, Same defects on butt of an ax 
handle. 5, Stains produced by sapsucker pecking in western white oak.] 
