HEMIPTERA. 
147 
Suborder PARASITA (Par-a-si'ta). 
The Parasita includes certain parasites of man and other 
mammals, commonly known as lice. They are wingless, 
and differ from other Hemiptera in having the beak fleshy 
and not jointed. This suborder is represented in the United 
States by only one family, the Pediculidce . 
Family PEDICULID2E (Ped-i-cu'li-dae). 
1 
The Lice . 
This family comprises the true lice, which differ from the 
bird-lice of the order Mallophaga in having sucking mouth- 
parts. The true lice live on the skin of mammals, and suck 
their blood. 
There are three species that infest man : one living on 
the head, among the hair; and the other two on the body. 
Several species infest our domestic animals. The more 
common of these are the louse of the horse (Fig. 182), and 
the louse of the cow (Fig. 183). 
Various substances are used for destroying lice on domes- 
tic animals: among them are a strong infusion of tobacco, 
Fig. 183 .—-H. eurysternus . 
(From Law.) 
Fig. 182. —Hcematopinus 
asint, (From Law.) 
