Puate LXII 
THE HOG LOUSE, HAEMATOPINUS 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); 8, transverse section through region of plates; 9, transverse section through 
rectum; 10, longitudinal section through abdominal segment (a, fat cells; b, oenocytes) 
734 
