406 ANNUAL REPORT SMITHSONIAN INSTITUTION, 193 3 



intervals of 2 to 3 weeks or by removing the normal hosts of the ticks 

 from the pastures for a sufficient length of time for the seed ticks to 

 hatch from the eggs and die of starvation. (See pi. 9, fig. 2.) The 

 eradication of this tick from 650,000 square miles of the area origi- 

 nally infested is a monumental accomplishment. The success of this 

 program carried out by the Bureau of Animal Industry, in coopera- 

 tion with the various States concerned, has been dependant upon the 

 rigid enforcement of quarantines, the education of the people to the 

 benefits to be derived from the elimination of the pest, and a sus- 

 tained drive from many quarters which has not abated since the 

 eradication program was initiated in 1906. 



