U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF ENTOMOLOGY— BULLETIN No. 51 



L. O. HOWARD, Entomologist. 



THE 



MEXICAN COTTON BOLL WEEVIL 



A Revision and Amplification of Bulletin 45, to 

 Include the Most Important Obser- 

 vations Made in 1904> 



PREPARED UNDER THE DIRECTION OF THE ENTOMOLOGIST 



W, D, HUNTER and W. E. HINDS* 



WASHINGTON: 

 GOVERNMENT PRINTING OFFICE. 



1905. 



