Bui. 39, Biological Survey, U. S. Dept. of Agriculture 
Plate VIII.. 
lit 
*yft ft » , r * -V*F; 
Work of Sapsucker on White Elm and Western Hemlock. 
[1, Radial section through swollen girdle on white elm, showing strong curl of grain. 2, Cross 
section; checks and stains. 3, Long vertical series of punctures in western hemlock. By 
H. E. Burke. 4, Exterior view of healed-over wounds of similar nature. 5, Interior view; 
extensive stain.] 
