52 



E. ERNEST GREEN. 



body. Posterior margin with four small and rather narrow lobes (fig. 11), the median 

 pair widely separate, the space between them being approximately twice as great 

 as that between the median and lateral lobes. There are no tubular squames. 

 Marginal spines very small. There is a deep marginal pore situated centrally between 

 the median lobes, another between the median and lateral lobes, and others — usually 

 in pairs — at points corresponding wdth the junctions of the suppressed segments. 

 No circumgenital glands. Dorsal pores numerous, minute. Length, 1-50 to 

 1*75 mm. 



o 



Hl-rJwl- 



Fig. 11. Mytilaspis heyeriae, Green, sp. n. ; 

 pygidium of adult female, X 210. 



Victoria : Mallee, on Beyeria viscosa (C. French, No. 100). 



The unusually wide interval between the median lobes, and the rigid derm of 

 the body of the insect, are characters that distinguish this species from any other 

 known members of the genus. 



Protodiaspis anomala, sp. nov. (fig. 12, 13). 



Female insects forming no definite puparium, but lying beneath a mass of loose 

 white filamentous secretion, amongst which the larval pellicles remain entangled. 



Adult female considerably smaller than, and completely enclosed within the 

 nymphal pellicle. Body of adult female (fig. 12, a) more or less globose ; the pygidium 



Fig. 12. Protodiaspis anomala, Green, sp. n. ; 



a, adult female, X 41 ; h, pygidium of adult 



female, x 210. 



(fig. 12, b) flattened, cordate acuminate. There are no definite lobes, but there are 

 one or two small irregular and asymmetrical marginal prominences on each side 

 near the termen. Anal orifice small, situated quite at the base of the pygidium. 

 No circumgenital glands. A few very small spines on the disk, and one marginal spine 

 on each side, near the base. Many linear thickenings of the derm run inwards from 

 the margin. Length, 0*50 to 0*75 mm. 



