U. S. l)i:iv\RTMKNT OF AGRICULTURE. 



BUREAU OF ENTOMOLOGY BULLETIN No. 59. 



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



rHOLIFi:ilATION 



AS A FACTOK IX TIIK NATURAL CONTROL 



MEXICAN COTTON JU)LL \VEL\ IL. 



W. E. HINDS, Ph. I).. 



Ill diiinii' nf Cnltnn I'.nll ]\'iirll J,<tl,i,rittun/. 



Issued Arra-sT 27, 1 !•()»>. 



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