Puate LVIII 
THE HOG LOUSE, HAEMATOPINUS SUIS LINNE 
1, Claws of adult (a, protrusible pad; b, joint between tibia and tarsus); 2, eggs attached to hog bristle 
(a, cap, or operculum; b, vitelline membrane; c, cement); 3, first instar; 4, second instar; 5, third instar; 
6, sternal plate; 7, exuvia attached to bristle; 8, adult male; 9, ventral aspect of posterior segments of 
abdomen of male; 10, adult female; 11, ventral aspect of posterior segments of abdomen of female (a, 
gonopods); 12, apodeme of prosternum and prothorax attached to sternal plate 
(3, 4, and 5 drawn from exuviae, to same scale as 8 and 10) 
726 
