Issued November 25, 1910. 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF ENTOMOLOfiY— CIRCULAR No. 129. 



L. O. HOWARD. EntomoIoBist and Chief of Bureau. 



INSECTS IN THEIR RELATION TO THE REDUCTION 



OF FUTURE SUPPLIES OF TIMBER, AND 



GENERAL PRINCIPLES OF CONTROL. 



A. D. HOPKINS, 



In Charge of Forest Insect Investigations. 



64130* — Cir. 129 — 10 wASHrNoroN : government printinq ofrce : 1910 



