U.S. DEPARTMENT OF AGRICULTURE. 
division of estomolooy. 
Bulletin No. 24. 
THE 
BOLL WORM OF COTTON 
A 
REPORT OF PROGRESS 
IN A 
SUPPLEMENTARY INVESTIGATION OF THIS INSECT. 
MADE UNDER THE DIRECTION OF THE ENTOMOLOGIST 
BY 
F. W. MAIXY. 
(PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE.) 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE, 
I 89 I . 
