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.] 



