SB 

 818 

 C578 

 ENT 



Issued November 25, 1010. 



U. S. DEPARTMENT OF AGRICULTURE. 

 BUREAU OF ENTOMOLOGY— CIRCULAR No. 129. 



L. O. HOWARD, Entomologist and Chief of Bureau. 



INSECTS IN THEIR RELATION TO THE REDUCTION 



OF FUTURE SUPPLIES OF TIMBER, AND 



GENERAL PRINCIPLES OF CONTROL. 



BY 



A. D. HOPKINS, 



In Charge of Forest Insect Investigations. 



64130°— Cir. 129 — 10 Washington : government printing ofrce : 1910 





