W Technical Series, No. 15. 



U. S. DEPARTMENT OF AGRICULTURE, 



BXJREATJ Oli" ElSTTOIVtOILiOGrY. 



L. 0. HOWARD, Entomologist and Chief of Bureau. 



A REVISION OF THE IXODOIDEA, OR TICKS, 

 OF THE UNITED STATES. 



BY 

 NATHAN BANKS, 



Assistant Entomologist. 



Issued June 6, 1908. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1 908. 



Zo^l-^A' 



