Maskell. — On Coccididse. 209 



i 



teriorly" ; whereas D. fimbriate,, like D. rosce, tapers pos- 

 teriorly. Further, in Parlatoria the fringe extends not only 

 over all the pvgidial region, but also to the anterior abdominal 

 segments, while in D. fimbriata it is very short. I observe, 

 also, that in Low's description of D. visci, Schrank (according 

 to Comstock, Second Cornell Report, 1883), the scaly hairs in 

 that species are "unusually numerous — seventeen on one side 

 and twenty on the other": evidently a terminal fringe. I 

 must remark that no species of Diaspis hitherto described has 

 less than five groups of spinnerets, except D. zamics, Morgan 

 (Ent. Mo. Mag., Feb., 1890), which has none at all. Parla- 

 toria appears to have always four. On the whole, I shall 

 leave this insect at present in the genus Diaspis, subject to 

 future correction. 



Genus Mytilaspis, Targioni-Tozzetti. 

 Mytilaspis casuarinse, sp. nov. Plate XL, fig. 7. 



Female puparium snowy- white, convex, elongated, nar- 

 row ; length, about xt m - Pellicles terminal, orange-red. 



Male puparium narrow, elongated, flatter than that of the 

 female, but with no sign of carination ; colour greyish, pel- 

 licle yellow. Length about ^in. 



Adult female brown, elongated ; length about ^in. before 

 gestation. Abdomen exhibiting a median depression, the 

 median lobes being represented by thickening of the margin ; 

 margin on each side much crenulated, and bearing four or five 

 short hairs far apart. The spinnerets are very numerous, 

 both single and in groups ; but I have not been able to make 

 out clearly whether there are five groups or an arch. 



Adult male unknown. 



Hab. In Australia, on Casuariua sp. Specimens from 

 Mr. Koebele. 



The non-carinated male puparium separates this species 

 from Chionaspis, and the absence of a terminal fringe from 

 Leucaspis. 



Genus Leucaspis, Targioni-Tozzetti. 



This genus resembles Mytilaspis very closely as far as the 

 form of the puparium is concerned, and the only distinguishing 

 character of the female insect is the presence of a fringe of 

 spines on the abdominal extremity. As a similar fringe is 

 considered sufficient to separate Parlatoria from Aspidiotus, I 

 presume that it must be sufficient also in this case, and I 

 shall not attempt to disturb Targioni's arrangement. 



Leucaspis cordylinidis, sp. nov. Plate XL, figs. 8, 9. 



Female puparium rather convex, narrow, elongated, and 

 straight ; colour white ; pellicles terminal, small, greenish- 

 U 



