Sheep-Scab. 



349 



in size and form from the Sheep-Scab parasite, but as it often 

 produces irritation of the skin, accompanied by constant 

 rubbing, which is also a usual symptom in Sheep-Scab, it has 



{Magnified : the line shows natural size ) 

 Figure 2.— Common Tick. 



been considered desirable to produce the above sketch, in order 

 to guard against errors in diagnosis. Where these ticks are 

 numerous and causing much irritation of the skin, it may be 

 desirable to dip the sheep once with the same solution as for 

 scab. 



