16 
THE EOCKY MOUNTAIN SPOTTED FEVER TICK. 
During the investigation about 850 lots of the fever species have 
been collected. The following is a list of the counties and the mun- 
Fig. 1. — Map showing region in the United States in which the Rocky Mountain spotted- 
fever tick occurs. The degree of shading indicates the relative abundance of the tick 
in different sections. (From Bishopp.) 
ber of localities within those counties where the species has been 
taken by the bureau : 
NUMBER OF LOCALITIES, DY COUNTIES AND STATES, IN WHICH THE SPOTTED-FEVER 
TICK IS KNOWN TO OCCUR. 
California. — Modoc County, 3; Lassen County, 1. 
Colorado. — Boulder County, 4 ; Clear Creek County. 1 ; Eagle County, 1 ; 
Garfield County, 1; Gunnison County, 1; Jefferson County, 1; Lorimer County, 
3; Mesa County, 2; Pitkin County, 1; Summit County, 1. 
Idaho. — Bannock County, 7; Bingham County, 2; Blaine County, 3; Boise 
County, 1 ; Bonner County, 2 ; Canyon County, 1 ; Cassia County, 2 ; Elmore 
County, 3; Fremont County, 6; Kootenai County, 2; Lemlii County, 2; Lincoln 
County, 2; Oneida County, 4; Shoshone County, 1; Washington County, 1; 
Twin Falls County, 1. 
