U. S. DEPARTMENT OE AGRICULTURE, 



BUREAU OF ENTOMOLOGY BULLETIN NO. 74. 



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



SOME FACTORS IN THE NATURAL 



CONTROL OF THE MEXICAN 



COTTON BOLL WEEVIL. 



BY 



W. E. HINDS, Ph. D., 



In Charge of Cotton Boll Weevil Laboratory. 



Issued December 14, 1907 



WASHINGTON: 



GOVE R N M E N T PRINTING OPPIC E 



1 !><> 7 . 



