CONTENTS 
CONCERNING THE NORTH AMERICAN FEVEB TICK. 
Page. 
[ntroductory 9 
Losses occasioned by the cattle tick 11 
The life history of I icks in general L2 
The Life history of the cattle tick L3 
Period previous to ovipositioi) II 
Oviposition period II 
Egg Btage 15 
[ncubation 17 
Relation of temperature to incubation L9 
Effect of heal and cold on eggs 21 
Submergence of eggs in water 22 
Percentage of eggs hatching 23 
Larval or seed-tick stage 23 
Nonparasitic period 23 
Effect of water on seed t icks " 24 
Longevity of seed licks 25 
Parasit ic period 27 
Development on host 28 
Adult stage 30 
Effect of continuous cold and heat on engorged females 31 
Effect of direct sunlight on adults 32 
Effect of submergence in water on engorged adult 1 icks 32 
Dropping from host 33 
Locomotion 33 
Host relations of the cattle lick 34 
Relation between ration and tick infestation 35 
Enemies of ticks 36 
The practical application of the information recorded in this bulletin 37 
NOTES ON VARIOUS SPECIES OF TICKS FOUND IN THE UNITED STATES. 
Classification and habits of ticks 40 
Key to families, subfamilies, and North American genera of ticks 
Ixt'doidea) 40 
Family Argasidse 41 
I renus Argas 42 
Genu- < rrnithodoros 45 
Family Ixodidse 46 
Subfamily Rhipicephalina? -17 
(ion us rihipieephalus 47 
Genus Margaropus 49 
Genus Dermacentor 49 
Genus Eaemaphysalis 52 
Subfamily Ixodinse 54 
( renus Ixodes 54 
( I en us A in bl yon i ma 58 
Bibliography 64 
Index 77 
5 
