U. S. DEPARTMENT OE AGRICULTURE, 
BUREAU OF ENTOMOLOGY -BULLETIN No. 86. 
L. O. HOWARD. Entomologist and Chief of Bureau. 
PLANT-BUGS INJURIOUS TO 
COTTON BOLLS. 
BY 
A. W. MORRILL, Ph. D., 
Entomologist of the Arizona Horticultural Commission and of the Arizona Agricultural 
Experiment Station. 
Issued June 14, 1910. 
i> I B R A R y" 
* JUN W 1910 * 
S-JUill 
WASHINGTON: 
GOVERNMENT lMilNTlNT, OFFICE. 
1 9 I 0. 
