Bui. 40, Div. of Entomology, U. S. Dept of Agncultur 



Plate XIII. 



Galleries and Mines of the Spruce-destroying Beetle. 



Showing parts of six primary galleries, reduced about one-fourth. (From Bui. 

 28, n. s., Div. of Entomology, U. S. Dept. of Agriculture.) 



