52 Transactions. — Zoology. 



Mytilaspis. But on careful examination, and especially when 

 the puparium is overturned, and the insect and pellicles are 

 viewed by transmitted light, the true generic position becomes 

 clear. I think there is no doubt that the species is distinct, 

 from its smallness, from the broad pyriform puparium, from 

 the delicate threads on the larval pellicle, and from the 

 characters of the abdominal extremity. 



Genus Ischnaspis, Douglas. 



Ischnaspis filiformis, Douglas. Douglas, Ent. Mo. Mag., 

 1887, p. 21. 



Specimens of this insect have been sent to me by Mr. 

 Quinn, from Adelaide, South Australia. They were plentiful 

 on palms in hothouses at that place. 



The species is clearly tropical, reported originally from 

 Demerara and found all over the West Indies. Probably it 

 also exists in many other localities. 



Genus Poliaspis, Maskell. 

 Poliaspis exocarpi, Maskell. N.Z. Trans., vol. xxiv., 1891, 

 p. 17. 



I have received specimens of this species from Mr. Frog- 

 gatt, on Oxylobium trilobatum, from Bankstown, near Sydney. 

 These exhibit a very slight variation from the type, the lower 

 median group of spinnerets having tbree, or sometimes four, 

 orifices. But this is not sufficient to separate them from the 

 species. The puparia have a glistening, burnished appear- 

 ance. 



Later specimens on Dillicynia sp., from Oatley, near 

 Sydney, have similar characters. 



Sub-family LECANIN^E. 

 Section LECANIO-DIASPID^]. 

 Genus Ctenochiton. 

 Ctenochiton eucalypti, sp. nov. Plate III., figs. 1-12. 



Test of adult female waxy, whitish or yellowish- white. 

 The central region is formed of a thick pyramidal mass of 

 wax, the sides of which are indented, the angles rounded, and 

 the whole sometimes cruciform, sometimes irregularly tri- 

 angular: from this central mass to the margin the test is 

 thinner, formed of an elliptical ring of irregularly-hexagonal 

 plates and an outer ring of pentagonal plates with the bases 

 outwards, and along the bases of these is a row of small, 

 more or less rectangular plates, forming a fringe. The whole 

 test is very convex in the latest stage, but flatter in the early 

 adult, and in this earlier state the central mass is much 

 thinner. The test just covers the insect. 



