mv,m SECTS. 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF ENTOMOLOGY— BULLETIN NO. 77. 



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



HIBERNATION OF THE MEXICAN 

 COTTON BOLL WEEVIL. 



BY 



W. E. HINDS AND W. W. YOTHERS, 



UNDER THE DIRECTION OF 



W. D. HUNTER. 



Issued October 18, 1909. 



Z3^4^^SS 



WASHINGTON: 



GOVERNMKNT PRINTTNd OFFICE. 



1909. 



