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 cf 
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. 
Oxvuris MastTIGoDEs (Mastix—whip ; eidos—form). 
Synonym.—Long-tailed Oxyuris. 
Distribution.—Found throughout America and Eu- 
rope. 
Description.—Similar to the preceding species in 
size, shape andcolor; 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 Intested.—The horse, the ass and the mule. 
Parts Intested.—The czecum, the colon and the rec- 
tum. 
Symptoms 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- 
stoma and Uncinaria. 
