BY E. ERNEST GREEN. 463 



divergent, forming a narrow chitinous margin to the median 

 cleft, their apices prominent and broadly truncate. Spiniform 

 squames rather large and prominent. Circumgenital glands in 5 

 groups : median group with 4 to 6 orifices; upper laterals with 

 10 to 16; lower laterals with 24 to 28. Numerous conspicuous 

 oval pores on dorsal area of pygidium, in the usual linear series. 

 Long, 1-25 to 1-50 mm. 



HoM. — On undersurface of leaves of Eucaly}:>tus tereticornis ; 

 Young, N.S.W. (Coll. W. W. Froggatt, Nos. 332 and 354)— On 

 Eucalyptus sp. ; Goulburn Valley, Victoria (Coll. C. French^ 

 No. 9). 



I have been unable to compare the present insect with typical 

 examples of Maskell's Mytilaspis formosa (which it resembles so 

 remarkably in the disposition and colour of the puparia) : but 

 from that author's figures and description, it is evident that the 

 characters of the female insect are very distinct. 



Mytilaspis spinifera. Mask. 

 Mr. Froggatt has sent me typical examples of this species. 

 On examination, I find that Maskell was mistaken in assigning 

 the position of the remarkable series of spines to the dorsal sur- 

 face. Their real position is distinctly ventral. This species is^ 

 peculiar to the " Weeping Myall," Acacia penchila, A. Cunn., and 

 has a range as wide as its host plant. 



Antonina australis, n.sp. 

 (Plate xvi.) 



Insect enclosed in a white felted sac, with a small aperture at 

 posterior extremity, through which projects a delicate brittle 

 tubular filament. During the life of the insect this filament 

 usually bears at its extremity a globule of the liquid sugary 

 excreta, thus ensuring the discharge of this substance at a sufii- 

 cient distance to avoid inconvenience to the insect. The sacs are 

 more or less concealed beneath the sheathing bases of the leaves. 

 of the plant. 



Adult 2 (fig. 1) dull purple or reddish-brown. Subglobular, 

 somewhat flattened on the ventral area. In the early adult 



