CONTENTS. 



Page. 



Introduction 380 



Objects of the present paper 380 



Arrangement of paper 380 



Method of examination 381 



Classification, synonymy, and literature 381 



The position of the ticks in systematic zoology 382 



Ticks of the United States thus far reported for cattle 385 



The general structure of ticks 387 



The hfe history of ticks 398 



Bibliography 478 



List of families, subfamilies, genera, and species 489 



III 



