EXPLANATION OF PLATE XXIII. 



CHIONASPIS BICLAVIS. (Page 190.) 

 Fig. 1. Pygidium of adult female. X 250. 



PINNASPIS BUXI. (Page 207.) 



Fig. 2. Margin of pygidium of adult female, x 600, 

 3. Pygidium of adult female, x 250. 



