60 Transactions. — Zoology. 



indeed, I am not sure whether some amount of chemical know- 

 ledge might not be required for it. However, I venture once 

 more to draw attention to the point, in the hope that some 

 entomologist may get tired of the butterflies and beetles, and 

 turn to the study of Coccids. 



INDEX TO PLATES I.-XIII. 

 Plate I. 



Aspidiotus stibrubescens, insects on leaf. 



„ pygidium of female. 



Aspidiottis fodiens, insects on leaf. 



„ pygidium of female. 



Aspidiotus bossiece, insects ou leaves. 



pygidium of female. 

 Aspidiotus rossi, insects on ordinary leaf. 

 „ pygidium of female. 



„ insects on narrow leaves. 



CJiionaspis eugcnice, insects ou leaf. 



„ male and female puparia. 



„ pygidium of female. 



Chionaspis nitida, insects on leaves. 



„ male and female puparia. 



Fiorinia acacia, insects on twig. 



„ male and female puparia. 



„ pygidium of female. 



Plate II. 



Ctenochitou dacrydii, insects on bark. 



„ segment of female test. 



„ larva. 



„ antenna of larva. 



Inglisia inconspicua, female on twig. 



„ segment of female test. 



„ spike and penis of male. 



Lecanium baccatum, females and males on separate twigs. 

 „ female, ventral view. 



„ dorsal " black spot " of female, with anal 



lobes. 

 „ portion of epidermis. 



„ antenna of female. 



„ larva. 



„ antenna of larva. 



„ sacs of male pupse. 



„ extremity of male sac. 



Plate III, 



Signoretia atriplicis, insects on twig and leaves. 



„ male and female sacs on leaf. 



„ adult female, dorsal view, before gestation. 



„ antenna of female. 



„ marginal spines of adult female. 



„ female of second stage. 



„ marginal spines and fringe of female of 



second stage. 

 „ larva. 



„ antenna of male. 



