PARASITOLOGY. 107 



in this region and appears as a white deposit. Pru- 

 ritus may accompany this affection if the worms be 

 lodged in the rectum. The animal rubs the root of 

 the tail; as a result the hair becomes rough, broken, 

 and has a matted appearance. The animal is un- 

 thrifty ; the coat is rough; worms are passed with 

 the feces, which is a diagnostic symptom. 



Treatment. — An aloetic ball containing powdered 

 aloes one ounce and powdered nux vomica two drams, 

 followed by tartar emetic two drams twice a day for 

 three days ; or, iron sulphate, two- to three-dram 

 doses twice daily for several days. 



OxYURiS Mastigodes (Mastix — whip ; eidos — form). 



Synonym. — Long-tailed Oxyuris. 



Distribntion. — Found throughout America and Eu- 

 rope. 



Description. — Similar to the preceding species in 

 size, shape and color ; the tail of the female is atten- 

 uated ; the attenuated portion is three to four times 

 the length of the body ; the female measures from 

 three to four inches in length; the male is similar to 

 the male of the Oxyuris Curvula. 



Animals Infested. — The horse, the ass and the mule. 



Parts Infested. — The caecum, the colon and the rec- 

 tum. 



Syinptoms and Treatment. — Same as with the Oxy- 

 uris Curvula. 



STRONGYLIDAE. 



The family Strongylidae includes a large group of 

 blood-sucking worms. It includes six genera com- 

 mon to the domesticated animals, viz.: Strongylus, 

 Sclerostoma, Stephanurus, Syngamus, Oesophago= 

 ^toma and Uncinaria. 



