U. S. DEPARTMENT OF AGRICULTURE 



BUREAU OF ENTOMOLOGY BULLETIN No. 73. 



L. O. HOWARD. Entomologist and Chid oi Bureau. 



STUDIES OF PARASITES OF THE 

 COTTON BOLL WEEVIL. 



BY 



W. DWIGHT PIERCE, 

 Special Field Agent. 



[bsued January 21, 1908. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1 908. 



