U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF ENTOMOLOGY- BULLETIN No. 113. 



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



THE PRINCIPAL CACTUS INSECTS 

 OF THE UNITED STATES. 



BY 



W. D. HUNTER, 



In Charge of Southern Field Crop Insect Investigations, 



F. C. PRATT, 



Late Assistant Entomologist, 



AND 



J. D. MITCHELL, 



Agent and Expert. 



Issued December 19, 1912. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1912. 



