114 PARASITOLOGY. 



Strongylus Micrurus (Micros — small ; oura — tail) . 



Distribution. — Common in certain localities of the 

 United States ; found in Europe. 



Description. — The parasite resembles the preceding 

 one in general appearance ; is white in color ; the 

 mouth is circular and nude ; the spiculae of the male 

 are short and strong, the caudal pouch small ; the 

 body of the female tapers to a short, sharp tail ; the 

 male is one and one-half to two inches long, the fe- 

 male two to three inches ; the female is ovovivipa- 

 rous. 



Animal Infested. — The ox. 



Parts Infested. — Bronchi and air cells. 



Strongylus Pulmonalis (Pulmo — a lung) . 



Distribution. — Found in America and Europe. 



Description. — The mouth is circular and is sur- 

 rounded by small papillae ; the caudal pouch of the 

 male is bell-shaped and is provided with seven ribs ; 

 the tail of the female is attenuated, tapering to a 

 sharp point ; the male is one to one and one-quarter 

 inches long, the female one and one-quarter to one 

 and one-half inches. 



Anijnals Infested. — Principally young calves. 



Parts Infested. — Principally bronchi. 



Conditio7i Produced. — The conditions and symptoms 

 are the same as given in the general description of 

 verminous bronchitis. 



The malady is often called Hoose, Husk, or Paper 

 Skin. 



Strongylus Filaria (Strongylos — cylindrical) 

 (filum — a thread). 



Distribution.— YoMnd in the United States and 

 other countries. 



