Plate 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 



