ERADICATION OF THE ROCKY MOUNTAIN SPOTTED FEVER TICK. 11 
it would be necessary to herd the sheep with a knowledge of the loca- 
tion of the ticks. It is extremely doubtful if sheep would be of much 
importance as collectors of ticks if they were allowed to run free. 
The several limitations to the practicability of using sheep in the 
eradication of the spotted fever ticks that have been mentioned em- 
phasize the great importance of following the plan of dipping do- 
mestic animals which is successfully under way. Sheep may be used 
under some conditions in the work, but the main reliance must be 
upon the dipping of horses and cattle. The extent to which sheep 
may be used will depend upon future experiments and observations. 
o 
WASHINGTON : GOVERNMENT PRINTING OFFICE : 1913 
