OF PARASITOLOGY. 
the female is straight; she is ovoviviparous. The 
caudal extremity of the male is provided with two 
spiculae of unequal length and two anal papillae. 
The head is provided with two lateral lips. 
Life History—Ransom has shown that the larva 
of horse flies breeding in manure, devour the ova 
in which parasite it develops to fully mature larva by 
the time the flies are mature. Horses taking these 
flies into the stomach become infested. 
Animals Intested.—The horse, the ass and the mule. 
Pait Infested.—The stomach, 
Injury to Host.—The worms may be found in myr- 
iads, free inthe stomach contents. Occasionally one 
will be found with its head lodged in the mouth of 
a duct of a gastric gland. They may produce ulcers 
and gastritis and interfere with the health of the 
animal. 
Treatment.—Benzine and gasoline, in doses of two 
to four drams, followed by physic. 
SPIROPTERA STRONGYLINA (Strongylos—round). 
Synonwi.—Arduenna strongylina. 
Distribution —Found in Europe; very common in the 
United States. 
Description—A small white worm, thread-like in cali- 
bre. The male is about one-half inch in length; the female 
three-fourths to four-fifths of aninch. The mouth is round, 
and is not provided with lips or papillae. The worm may 
be straight or curved in a half-moon shape; it has narrow 
lateral wings on each side, just posterior to the head. 
Tail of male is tightly coiled, one and one-half times 
and is provided with two broad unequal membraneous 
alae, six papillae and two spicule. 
Animal Intested.—The hog. 
Part Infested.—The stomach. 
Injury to Host—The worms are usually found free 
although they have been reported to have formed 
