49 PARASITOLOGY. 
TRICHODECTES Latus (Latus—broad). 
Animal Infested.—The dog. 
Description.—The head is wider than long; the 
antennae and legs are short and each is composed of 
three articles or segments; the abdomen is globular 
Fig. 9—TRICHODECTES SCALARIS—OvuM, 
a, Ovum in Process of Segmentation, b, Hair. 
1x% inch, magnified. 
in shape. It is the host of the Cryptocyst, which is 
the larvae of the Taenia Canina. 
TRICHODECTES SUBROSTRATUS. 
Animal Intested.—The cat. 
Description.—The head is slightly longer than 
broad, and pointed in front; the abdomen is ellip- 
ticalin shape; the legs and antennae are short, and 
are composed of three articles each. 
LIOTHEIDAE. 
The lice of chickens belong to the family Liothei- 
dae. The lice from birds roosting in the barn, or 
