PARASITIC DISEASES 

 HOG-LOUSE (H.EMATOPINUS SUIS) 



In the large hog herds of the corn belt a very frequently found 

 parasite is the hog-louse. This parasite is known in scientific hter- 

 ature as the Haematopinus suis. It is called hematopinus because 

 it is a blood-sucking parasite, and suis because it is found on the 

 hog. So we find that this parasite is, in reality, the blood-sucking 

 parasite of the hog or the blood-sucking louse. 



(- 



i 





Fig. 89. — Haematopinus suis: a, Head with piercing stylet; b, antennae, 

 five segments; c, deep notch in which the eyes are implanted; d, claws on end 

 of terminal segment; e, abdomen; /, thorax, bearing three pairs of legs (Kaupp). 



The Haematopinus suis is the largest of all the animal lice. It 

 is about i inch long and about to inch wide. When exam- 

 ined under a magnifying lens or a reading glass, the parasite 

 will be found to have a head, a thorax or chest, and a posterior 

 body or abdomen. If we look closely at the head of the parasite 

 we will find many interesting things about it. At the extreme end 

 of the head there is located a piercing stylet or sucking apparatus, 



fi48 



