U. S. DEPARTMENT OF AGRICULTURE. 
FOURTH REPOET 
OF THE 
UNITED STATES 
ENTOMOLOGICAL COMMISSION, 
BEING A KEVI81 D EDITION OF BULLETIN NO. 3, 
AND THE TIN A I. REPORT 
on ihi 
COTTON WORM, 
TOGBTHMB with a OHAPTSB OS THM 
BOLL WORM. 
HY 
CHARLES V. RILEY, Ph.D. 
WITH MAPS AM) ILUSTKATIONS. 
WASni^TGTO^: 
GOV ERNHENT PRINTING OFFICE. 
1885. 
