LETTER OF TRANSMITTAL. 
Unitep States DepArTMENT OF AGRICULTURE, 
Bureau or Entromo.ocy, 
Washington, D. C., July 20, 1911. 
Sir: I have the honor to transmit herewith a manuscript entitled 
“The Rocky Mountain Spotted Fever Tick, with Special Reference 
to the Problem of its Control in the Bitter Root Valley in Montana,” 
prepared by Messrs. W. D. Hunter and F. C. Bishopp, of this bureau. 
The work of this bureau on the spotted-fever-tick problem began 
in 1909. It has been conducted in cooperation with the Biological 
Survey of this department and the Montana Agricultural Experiment 
Station. The investigation of the life history and habits of the tick 
which transmits spotted fever has revealed certain feasible and eco- 
nomical methods of control. These methods render it possible to 
reduce the numbers of the ticks to such an extent that the cases of 
spotted fever in the Bitter Root Valley will be very few in number, 
if, indeed, the disease is not eliminated altogether. The plans for 
this work are outlined in this manuscript. 
It is recommended that the accompanying manuscript be published 
as Bulletin No. 105 of this bureau. 
Respectfully, L. O. Howarp, 
Chief of Bureau. 
Hon. James Wirson, 
Secretary of Agriculture. 
