70 Transactions. — Zoology. 



Larva yellow, elliptical ; length about -^^in. The dorsum 

 is longitudinally corrugated. Antennae of six joints, of the 

 normal Diaspid form. The abdomen terminates with two 

 moderate setae. 



Adult male unknown. 



Hah. In Australia, on Acacia pendula. My specimens 

 were sent by Mr. W. W. Froggatt, from Urana, New South 

 Wales. 



I believe this to be a quite distinct species, which I place 

 in the genus Mytilaspis on account of the non-carinated male 

 puparium. The abdominal extremity, the very numerous 

 spinnerets and small spines, and the six large dorsal spines 

 appear to be clear distinctions. 



Mytilaspis convexa, sp. uov. Plate III., figs. 10-12. 



Female puparium dirty greyish- white, somewhat expanded 

 posteriorly, very convex : the second pellicle is generally so 

 much raised up that its posterior edge forms quite a ridge over 

 the secreted portion. Length of puparium averaging about 



Male puparium similar in colour to that of the female, 

 convex, elongated, subcylindrical ; not carinated. Length 

 about aVn. 



Adult female of normal form ; colour brown ; length about 

 Jgin. Abdomen ending in two median lobes, not adjacent, 

 broadly rounded with short straight sides, the posterior 

 margins very minutely serrulate. At each side, and separated 

 from the median lobes by two spines, is a smaller broadly- 

 rounded serrulated lobe. Margin of the abdomen broken by 

 many small serrations, and bearing several short spines. No 

 groups of spinnerets, and not many dorsal single orifices. The 

 rudimentary antennae are rather large. 



Adult male unknown. 



Hah. In Australia, on Acacia sp. Mr. Olliff sent me 

 specimens from Sydney. 



The non-carinated male puparium fixes the genus of this 

 insect. The absence of spinneret-groups is abnormal. I 

 think M. drimydis, Mask. (N.Z. Trans., vol. xi., 1878, p. 196), 

 is the only other species with this peculiarity. 



Mytilaspis grandilobis, sp. nov. Plate III., figs. 13, 14. 



Female puparium snowy-white : the real form is elongated 

 and mussel-shaped, or slightly pyriform ; but it is frequently 

 obscured by white cottony fluff. Length averaging about 



Male puparium snowy-white, semi-cylindrical, with parallel 

 sides ; not carinated ; length about Tr^in. 



Adult female yellowish or orange ; form normal of the 



