Plate LXII 

 the hog louse, habmatopinus suis linne 



1, Transverse section through head, showing Pawlowsky's glands opening into piercer sheath (a, glands; 



b, piercer sheath); 2, longitudinal section through Pawlowsky's gland (drawn with oil immersion); 3, 

 salivary glands in natural position (a, central aspect: b, lateral aspect); 4, horseshoe-shaped gland; 5, 

 oblong-ovate gland; 6, anterior region of horseshoe-shaped gland and duct (drawn from gross specimen 

 with oil immersion); 7, stomach (a, esophagus; b, mid-intestine; c, small intestine; d, region of plates: e, 

 rectum; f, malpighian tubes); S, transverse section through region of plates; 9, transverse section through 

 rectum; 10, longitudinal section through abdominal segment (a, fat cells; b, oenocytes) 



734 



