U. S. DEPARTMENT OF ACxRICULTURE, 



BUREAU OF ENTOMOLOGY -BULLETIN NO. 



L. O. I IOWARD, I ntnmoloBUt and Chief of Bureau. 



HIBERNATION OF THE MEXICAN 

 COTTON BOLL WEEVIL 



BY 



\Y. F, HINDS and W. W, YOTJIEKS, 



tNDKR THE DIRECTION OF 



W. I). HUNTER. 



Issued October 18, 1909. 



WASHINGTON: 



CdVKKNMKNT l'KINTIM; OFFICE 



1909. 



