U. 5. DEPARTMENT OF AGRICULTURE, 
BUREAU OF ENTOMOLOGY—BULLETIN No. 106, 
L. O. HOWARD, Entomologist and Chief of Bureau. 
THE LIFE HISTORY AND BIONOMICS OF SOME 
NORTH AMERICAN TICKS. 
BY 
W. A. HOOKER, F. C. BISHOPP, anp H. P. WOOD. 
UNDER THE DIRECTION OF 
W. D. HUNTER. 
IssuepD SEPTEMBER 7, 1912. 
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WASHINGTON: 
GOVERNMENT PRINTING OFFIOR. 
1912, 
