Bui. 33, Bureau of Forestry, U. S. Dept. of Agriculture. 



Plate VII. 



Fig. 1.— "Black Check" in Hemlock Lumber, caused by Insect 

 Injury when Tree was small. 



Fig. 2. -Hemlock, near Hoquiam. Wash., killed by Buprestid Larv/c. 



