TICKS. 



263 



life-history of ticks in general is a simple one. The full grown 

 and full fed female drops from the skin on to the ground and lays a 

 large number of eggs in a mass ; these eggs hatch to small active 

 creatures, with three pairs of legs, which run about on vegetation 

 and are believed to feed upon the juices of plants. They fasten 

 themselves upon the skins of animals as they pass through the 

 vegetation and then moult, becoming fully developed with four pairs 

 of legs. There is a large number of species, some of importance in 

 communicating diseases to cattle and dogs. The treatment of the above 



FIG. 317. 

 Louse. (Much magnified.) 



insect and ticks is a matter generally of expert veterinary knowledge, 

 many applications that kill the insect being harmful to the animals. 

 General cleanliness in the stables, cattle-sheds and fowl-houses is very 



