CHAPTER XIV. 



THE SKIN AND ITS AFFECTIONS. 



lin in the skin. 'The fly.' Maggots in sheep. Lice in animals. 

 common flea ; pulex irritans. Warbles or wornils. (Estrus bovinus. 

 -Bracy Clark on the gad-fly. Origin of the word ' gad.' Metamorphoses 

 oestri. (Estrus bovis in the human subject. Ticks. The dog-tick. 

 ox-tick. Hippoboscidse. Hippobosca equina, or horse-fly. Melo- 

 phagus ovinus ; sheep louse or tick. Poultry lousiness in the horse. 

 Phthiriasis equi. Descriptions of the disease by M. Bouley and Mr 

 Henderson. Simulum reptans. Chrysops coecutiens. Argas Persicus. 

 Argas Americanus. Burns and scalds. Ambustio. Different kinds 

 of burns and scalds Treatment. Effects of caustics. Frost-bites. Dis- 

 eases arising from special internal causes. Elephantiasis. Eruptive 

 Fevers. Typhus. Scarlatina. Eubeola. Variola. Variolous fever in 

 different animals. Cow-pox. Small-pox in sheep. Varicella. Epizootic 

 aphtha. 



VEKMIN IN THE SKIN. ' THE FLY.' 



A VERY considerable number of parasites live on the skins 

 of animals, besides the mites which we have before referred 

 to, and which induce scab in sheep and a similar disease in 

 other animals. The effect of the development of these 

 parasites on the skin and on the health of the domestic 

 quadruped varies greatly. No more loathsome affection can 

 exist than the one which is very common in Scotland in hot 

 sultry weather, and which consists in the development of 

 VOL. n. 3 G 



