Jul. 48, Div. of Entomology, U. S. Dept. of Agriculture. 



Plate V. 



Work of the Spruce-destroying Beetle. 



a, Primary gallery; b, borings packed in side: c, entrance and central burrow through the packed 

 borings; d, larval mines. (From Yearbook, U. S. Dept. of Agriculture, 1902.) 



28235— No. 48—04- 



