450 Mr. E. E. Green on some 



moderately long stout spines, their extremities truncate. 

 Stigmatic cleft shallow, with three or four stout pointed 

 stigmatic spines, one or more of which are longer and curved 

 (fig. 2 a). Derm with small and rather obscure circular and 

 oval pores, more conspicuous towards the margin. . Nume- 

 rous small circular pores (circumgenital glands) surrounding 

 the genital aperture, and a group of similar pores (para- 

 stigmatic glands) below the stigmatic cleft. 



Length 5 millim. ; breadth 3-3| millim. 



On the twigs bearing the adult females are some very 

 imperfect empty and crushed tests, which may represent either 

 the second stage of the female or the male puparia. They 

 are composed of granules or small irregular plates of trans- 

 parent waxy matter. 



Hub. On Araucaria sp., Victoria, Australia. (Lidgett 

 Coll. no. 50.) 



I have considerable difficulty in determining the proper 

 genus in which to place this species. The structural cha- 

 racters of the insect itself suggest Eriochiton ; but the female 

 forms no felted or cottony covering — in fact, the adult female, 

 as submitted to me, is practically naked, bearing only scat- 

 tered fragmentary patches of glassy wax. The complete 

 marginal series of stout spines distinguishes it from Lecanium. 



Although I can find no vestige of a marginal fringe of 

 flattened waxy plates, I have provisionally attached this insect 

 to Maskell's genus Ctenocliiton, to which in other respects it 

 conforms fairly well. In Cten. depressus, Mask., the fringe 

 is said to be " inconspicuous or sometimes absent " in the 

 adult female. 



Birch ippia, gen. nov. 



Test of adult female completely enclosing the insect, with 

 a small aperture at posterior extremity. 



Male puparium with a well-defined circular valve at hinder 

 end, through which the adult insect makes its escape. 



Adult female shrivelling to anterior extremity after gesta- 

 tion, the hinder part of the test being filled with the eggs. 

 Legs absent. Antenna? more or less rudimentary. Mentum 

 monomerous. Stigmatic spines present. Posterior extremity 

 cleft. Anal aperture surrounded by chitinous plates, which 

 do not meet to form a valve as in typical Lecaniinaa. Anal 

 ring with ten hairs. 



Adult male unknown. 



Larva with 6-jointed antennae; the terminal joint long. 

 Legs normal. Anal plates as in adult ; anal ring with six 



