SB 

 818 

 C578 

 ENT 



Issued March 31, 1911. 



' U. S. DEPARTMENT OF AGRICULTURE, 

 BUREAU OF ENTOMOLOGY— CIRCULAR No. 136. 



L. O. HOWARD. Entomologist and Chief of Bureau. 



THE DISTRIBUTION OF THE ROCKY MOUNTAIN 

 SPOTTED-FEVER TICK. 



BY 



F. C. BISHOPP, 



Agent and Expert. 



81201° 11 WASHINGTON : GOVERNMENT PRINTING OFFICE : 1911 



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