Maskell. — Oil Coccididae. 69 



Adult male not known with certainty. 



Hah. In Australia, on Eucalyptus sp., probably E. orbifolia, 

 as the leaves are short, almost circular, and whitish-yellow. 

 This plant is a native of Western Australia. My specimens 

 came from Mr. J. W. Douglas, who received them " indirectly 

 from Baron Von Mueller" ; locality not stated. 



Subsequently I received from Mr. French a leaf of Euca- 

 lyptus corynocalyx, from Kenmark, South Australia, with many 

 puparia, both male and female, which seemed to be of this 

 species ; but every individual had been parasitised and de- 

 stroyed. On a withered specimen of a male I noticed a rather 

 long spike. 



M. formosa, in its colours and the arrangement of the 

 puparia, is very elegant, and well deserves, I think, the name I 

 have given to it. 



Mytilaspis spinifera, sp. nov. Plate III., figs. 7-9. 



Female puparium snowy -white, pellicles light-yellow. 

 The larval pellicle is longitudinally corrugated, the second 

 pellicle smooth and subcircular ; the white fibrous secretion 

 widens very rapidly, with a terminal subcircular margin, so 

 that the whole puparium is broadly pyriform ; the two pellicles 

 together occupy less than half the length. Total length about 

 3-yn. 



Male puparium white, with yellow pellicle ; fiattish, sub- 

 cylindrical, not carinated. Length about TjVin- Iii some 

 specimens observed, half a dozen male puparia were congre- 

 gated under and partly hidden by that of the female. 



Adult female orange-yellow, darkening with age. Form 

 elliptical, with the thoracic and abdominal segments rather 

 distinct. Usually there is a slight covering of white meal on 

 the dorsum. Abdomen ending in a curve, broken by small 

 serrations. There are two median lobes, not adjacent ; each 

 lobe has a cylindrical shaft terminated by a cone. Between 

 the lobes are two short fine hairs, and on the curve of the 

 abdomen at each side are six or eight spines and from two to 

 six oval pores. Ventrally there are five groups of spinnerets : 

 upper group with 2 to 6 orifices, upper laterals 8 to 10, lower 

 laterals 10 to 15. Dorsally there are great numbers of smaller 

 spinnerets, which are congregated in large marginal groups on 

 each segment of the thorax and abdomen, and are interspersed 

 with small conical spines ; and on the thoracic segments the 

 spines are not only marginal, but extend in transverse rows 

 across the body : there are also a few on the cephalic extremity. 

 Moreover, on the dorsal surface there are six larger spines, one 

 on each side at the level of the rostrum, and two on each side 

 near the spiracles. The spiracles are rather large, and close 

 to each is a group of four spinnerets. 



