// 



U. S. DEPARTMENT OF AGRICULTURE, 



DIVISION OF ENTOMOLOGY— BULLETIN NO. 32, NEW SERIES. 



L. O. HOWARD, Entomologist. f ^/V^ 



INSECT ENEMIES OE THE PINE IN THE BLACK 

 HILLS FOREST RESERVE. 



AN ACCOUNT OF RESULTS OF SPECIAL INVESTIGATIONS, WITH 

 RECOMMENDATIONS FOR PREVENTING LOSSES. 



PREPARED UNDER THE DIRECTION OF THE ENTOMOLOGIST. 



By A. D. HOPKINS, Ph. D., 



Vice-Director and Entomologist of the West Virginia Agricultural 

 Experiment Station. 



$ % 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 



1902. 



