Aonidia. ^^ 



Adult male not observed. 



Embryo fully formed within body of parent. 



Young larvae not observed. 



The larval skin is very thick and opaque ; but there are suggestions of a 

 division into plates as in that oi A. corniger. The scale at the time of the first 

 moult {fig. ii) has a narrow marginal zone of silvery white secretion ; there is 

 a central felted ball and posterior mass of curling filaments as in the male 

 puparium. 



The female of the early second stage is of the normal oval form ; the 

 pygidium showing all the characters of a Parlatoria {fig. lo), with ten pointed 

 lobes between and beyond which are deeply fimbriated squames ; the tubular 

 spinnerets are short and cylindrical, opening by broad lunular pores on to the 

 extreme margin, with the exception of four which open on the dorsal surface 

 near the extremity. The lobes and squames become thickened as the insect 

 develops, and appear on the indurated pellicle which forms the puparium as 

 a series of marginal tooth-like projections {fig. 9). It is an interesting fact that 

 the large enveloping second pellicle of Fiorinia astelice, Mask., from New 

 Zealand has a very similar parlatoria-like margin to the pygidium. 



Habitat on leaves of an unidentified tree, Punduloya. The females are 

 ranged along the midrib and principal veins, while the more conspicuous male 

 puparia are scattered irregularly over the surface {fig. 3). 



A most interesting though very minute and inconspicuous species. The fact 

 of the male puparium being actually larger than that of the female is unusual. 

 The great change in form and character between the earlier and later periods 

 of the second stage of the female is also remarkable. The available material 

 was unfortunately insufficient to allow of this change being properly followed 

 out. The difference of form between the male and female puparia is so great 

 that they might easily be mistaken for distinct species. 



EXPLANATION OF PLATE XVIII. 



AONIDIA BULLATA. 



{Allfi^^ures^ excepting No. 3, 7nore or less etilarged.) 



Fig. I. Male puparium, from above. 



2. „ „ from below. 



3. Leaf, with insects in situ, nat. size. 



4. Female puparium, from above. 



5. „ „ „ below. 



6. „ „ „ the side. 



7. Adult female, before gestation, ventral view. 



8. Pygidium of adult female. 



9. Posterior extremity of second pellicle, dorsal view. 



10. „ „ of female, early second stage, dorsal view. 



11. Scale of young female, at time of first moult. 



