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U.S DEPARTMENT OF AGRICULTURE, 
DIVISION OF ENTOMOLOGY—BULLETIN NO, 32, NEW SERIES. 
L, O. HOWARD, Entomologist. 
ae as * 
- INSECT ENEMIES OF THE PINE EN 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. 
ea WASHINGTON: 
GOVERNMENT PRINTING 
19.03) = 
OFFICE. 
