Plate 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 

 abdonien of male; 10, adult female; 11, ventral aspect of posterior segments of abdomen of female (a, 

 gonopoda) ; 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 



