Hog Louse (Haematopinus suis)

The hog louse, Haematopinus suis, is an insect that is usually four to six millimeters long and is grayish-brown with dark brown and black markings. As a chewing louse, the hog louse has a wide head necessary to support the relatively large mandibles that are an essential component of its mouthparts. The male is slightly smaller than the female hog louse and is characterized by a black streak on its ventral surface.