668 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



Sucking Lice * 



The common sucking louse of cattle is the short-nosed ox- 

 louse (H amatopinus eurysternus). It is bluish-gray in color 

 and considerably larger than the biting louse, being about one- 



FIG. 587. The short-nosed ox-louse. U. S. Dept. of Agr. 



eighth inch in length. The head of this species, as well as the 

 other species of sucking lice, is rather pointed while the heads 

 of the biting species are more rounded. 



The long-nosed ox-louse (H. vituli), is 

 longer and more slender than the short- 

 nosed louse. It is generally less in 

 jurious. 



The long-nosed hog-louse (H. suis), 

 is the largest member of this group 

 which is at all common. It is nearly a 

 quarter of an inch long and is broad 

 across the abdomen. It is found on hogs 

 frequently and is said to be the worst 

 enemy of swine next to the cholera. Lice 

 are easier to eradicate on swine than 

 on the larger animals, so only neglect need cause loss from them. 

 A biting louse (H. pedalis), is found on the feet and legs of 

 sheep, below the long wool but it is rare and does little injury. 

 Dogs occasionally become infested with lice, both sucking and biting. 



* Siphunculata 



FIG. 588. Long nosed ox- 

 louse. U. S. Dept. of Agr. 



