PARASITIC DISEASES. 



923 



Pig. 1223.- 

 on 



-Dog-tick, Found 



Among the par- 

 asites of this class 

 that trouble sheep, 

 are some which we 

 have already men- 

 tipned in treating 

 of diseases of cattle. 

 There is one that 

 is usually classed 

 amon g the parasites 



of the dog (Fig. Fig. 1224.— Fodder, or Hay-louse. 

 1223), which is often 

 found on sheep, and is excessively annoying to them. Another, 

 called the fodder-louse, or hay-louse, sometimes infests sheep, 

 (Fig. 1224.) 



The vermin that affect the human 

 species are sometimes found on the 

 lower animals, and particularly on 

 sheep, This is true with regard to 

 both body and head lice. For a 

 representation of the former, see 

 Fig. 1225. 



Fig. 1225.— Human Body-louse (Pediculus u 



u ' . ' ' „,_ Fra. 1226.— Head ol Human Body- 



Humanus Corporis), Female. ' 



. louse, 

 a, Its egg. 



In Fig. 1226 is shown the head of the female (A), with one of 

 the mandibles isolated (B). 



In Fig. 1227 is shown the male of the body^louse, while in F}g. 

 1228 will be found a representation of the human head-louse, with 

 its method of affixing its eggs to the hair. 



In Figs. 1229 to 1234 we show a series- of vermin which infest 

 sheep as well as other domestic animals of a kindred nature. In 

 Fig. 1235 is shown the sheep-louse, and in Fig. I236 (i its larva. 



