U. S. DEPARTMENT OF AGRICULTURE, 





FOURTH REPORT 



"t^-] OF THE 



UNITED STATES 



ENTOMOLOGICAL COMMISSION, 



BEING A REVISED EDITION OF BULLETIN NO. 3, 

 AND THE FINAL EFFORT 



OjST the 



COTTO:^>r WOKM, 



TOGETHER WITH A CHAPTER ON THE 



BOLL WORM 



BY 



CHAHLES V. RILEY, Pli. D. 



WITH MAPS AND ILLUSTRATIONS. 



WASHIKGTOIs^: 



GOVERNMENT PKINTINa OFFICE. 

 1885. 



