U.^S. DEPARTMENT OF AGRICULTURE 



BUREAU OF ENTOMOLOGY BULLETIN NO. 77. 



I O. HOWARD, Entomologi* and Chief of Bureau. 



HIBERNATION OF Tilt: MEXICAN 

 (OTTON BOLL WEEVIL. 



BY 



\\\ E. HINDS and W. W. YOTHERS, 



DNDEB THE DIRECTION OF 



W. I). HUNTER. 



I ssi i i. ( ICTOBER IS, 1909. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 



L909, 



