120 FEATHER-LICE INFESTING CHICKENS. 
and a large abdomen, with confluent markings on the sides. 
The illustration (fig. 94) shows a female. 
Lipeurus heterographus Nitzsch. 
This parasite has been described as occurring quite com- 
monly in Europe upon the domestic fowl and upon pheasants, 
and is very likely to be found here as well. It is illustrated 
hebiter os }ay 
Lipeeurus variabilis Nitzsch. 
The illustration (fig. 96) shows this peculiar insect, which 
is quite common in Minnesota. It measures about 2mm. in 

Fig. 95.—Biting-louse of the 
chicken. Greatly enlarged. Fig. 96.—Biting-louse of the chicken. 
After Piaget. Greatly enlarged. Original. 
length, and possesses a very elongated, smooth and shining 
body of a whitish color. The black margins of the body, 
and the markings of the dorsal surface, distinguish it from 
all other feather-lice infesting chickens. 
Menopon pallidum Nitzsch. 
This is the common hen-louse, so familiar to all interest- 
ed in poultry raising, and so injurious to the chickens, and 
chiefly so to the younger ones. There is scarcely a chicken, 
which, if closely inspected, will not reveal its presence. This 
parasite is very active, and moves about the feathers of the 
