AGRICULTURAL EXPERIMENT STATION. 



99 



louse and body louse of man and a large number of other species 

 parasitic upon domestic and wild animals, are also bugs and belong to 

 the order Hemiptera (half-winged insects.) 



The bird lice or biting lice include a large number of species of 

 wingless parasites that infest birds and animals, and belong to the 

 order Pseudoneuroptera (false nerve-winged insects.) 



With the above general consideration we proceed to consider the 

 lice of domestic cattle, two species of which belong to the sucking 

 lice and a third belonging to the bird or biting lice. 



SHORT-NOSED OX-LOUSE. 

 (Haematopinws Eurysternus, Nitssch.) 



Order Hemiptra; Family Pediculidae. 

 History. 



This species has been known from the earliest times as a cattle louse 

 though often confused with the next species. It was accurately 

 described for the first time by Nitzsch in 1818. It has always been 

 regarding as troublesome, causing a disease called Phthiriasis, demand- 

 ing treatment. 



Fig. i. 



Description. 



Females about one-eighth to one-half of an inch long and fully haif 

 as wide. Head bluntly rounded in front, nearly as broad as long. 

 Antennae on the middle and side of the head, five jointed. Eyes 

 very small, located upon low eminences just back of the antennae, 

 front of the head provided with an extensible beak, which is armed 



