U. S. DEPARTMENT OF AGRICULTURE, 
BUREAU OF ENTOMOLOGY—BULLETIN No. 105. 
L. O. HOWARD, Entomologist and Chief of Bureau. 
THE ROCKY MOUNTAIN SPOTTED 
FEVER TICK. 
WITH SPECIAL REFERENCE TO THE PROBLEM 
OF ITS CONTROL IN THE BITTER ROOT 
VALLEY IN MONTANA. 
BY 
W. D. HUNTER, 
In Charge of Southern Field Crop Insect Investigations, 
AND 
F. CG. BISHOPP, 
Entomological Assistant. 
[In Cooperation with the Biological Survey and the 
Montana Agricultural College. ] 
IssurpD Novemeer 17, 1911. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1911. 
