Pirate LXVI 
THE HOG LOUSE, HAEMATOPINUS SUIS LINNE 
4, Longitudinal section through terminal chamber; 7, longitudinal section through terminal chamber; 
9, longitudinal section through egg chamber; 10, cross section through follicle cells; 21-25, cross sections 
through follicle cells in different stages in formation of epichorion; 26, surface view of epichorion; 27 and 28, 
cross section through follicle cells in different stages in formation of epichorion; 29, section through egg cap; 
34, longitudinal section through egg stigma 
(Figures on this plate copied from Gross and numbered according to his arrangement) 
742 
