PARASITOLOGY. 105 
Description.—The body is yellowish white in color; 
the male is one and one-half inches long; the female 
one and one-half to two inches. Common in U. S. 
Animals Intested.—Fowls. 
Parts Infested —Small intestines. 
Condition Produced.—Digestive disorders, as indi- 
gestion and diarrhoea, which may terminate in death. 
They have been found so numerous as to obstruct 
the lumen. 
Treatment.—For adult birds, powdered areca nut, 
twenty to thirty grains, made into pill form. Youn- 
ger birds should be given doses accordingly. Tur- 
pentine in doses of from one to two teaspoonfuls, 
given before feeding. 
HETERAKIS PAPILLOSA. 
History—Found common throughout the United 
States. 
Animal Infested —Chickens. 
Part Infested —Small intestines and caecum. 
Description—The male measures from one-third 
to one-half inch in length, the female from one-half 
to three-fourths inches. The body is white. The 
mouth is provided with three lips. The caudal ex- 
tremity of the male is provided with two spiculae of 
unequal length and a pre-anal sucker surrounded with 
a vesicular ring. It is provided with a row of papillae. 
The tail of the female is gradually attenuated to a 
sharp point. 
OXYURIDAE. 
The worms that belong to the family Oxyuridae 
are commonly called pin worms. They include a 
