Bui. 105, Bureau of Entomology, U. S. Dept. of Agriculture. 
Plate I. 
Fig. 1.— View in Lo Lo Canyon, which Leads Into the Bitter Root Valley, 
Showing Conditions Under which Ticks Thrive. 
Fig. 2.— Camp Laboratory near Florence, Mont., in one of the most Heavily 
Tick-Infested Regions Known. 
TICKS AND SPOTTED FEVER IN THE BITTER ROOT VALLEY. MONT. 
