213 



EXPLANATION OF PLATE. 



Page. 

 Plate XVII— 



Fig. i. Chionaspisdecurvata, Green, n.sp., pygidium of female, 



greatly enlarged ■••..'•-.• 63 



„ 2. Chionaspis (Hem ich ion aspis) minor, Maskell, pygidium 



of female, greatly enlarged . . . . . 127 





