U. S. DEPARTMENT OF AGRICULTURE, 
BUREAU OF ENTOMOLOGY— BULLETIN No. 105. 
X L. O. HOWARD, Entomologist and Chief of Bureau. 
THE ROCKY lOOTTAIH SPOTTED 
FEVER TICK. 
WITH SPECIAL REFERENCE TO THE PROBLEM 
OF ITS CONTROL IX THE BITTER ROOT 
VALLEY IX MONTANA; 
BY 
W. D. HUNTER, 
In Charge of Southern Field, Crop Insert Investigations, 
AND 
F. C. BISHOPP, 
Entomological Assistant. 
[In Cooperation with the Biological Survey and the 
Montana Agricultural College.] 
Issued X<>vemi?er 17, 1911. 
WASHINGTON: 
Oovki;\mpnt POINTING OFFICR 
ion. 
