U. S. DEPARTMENT OF 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. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE, 
L910. 
