48 Transactions. — Zoology. 



proaches M. convcxa, Mask., 1893 (on Acacia) ; but the four 

 terminal triangular lobes distinguish it. The transverse bands 

 of the puparium would not, I think, by themselves denote 

 more than a variety. 



Mytilaspis lactea, sp. nov. Plate II., figs. 1, 2. 



Female puparium of a delicate white colour, but frequently 

 more or less covered by a very thin layer of bark-cells of the 

 plant. Pellicles pale yellow. The puparium is broadly pyri- 

 form ; length, about ^in. 



Male puparium snowy- white, semicylindrical ; length, 

 about o^in. ; not at all carinated. 



Adult female dull-pink in colour, darkening to brown at 

 gestation. Form elongated, segmented ; length about T V m - 

 Abdomen ending with a small median depression, the sides of 

 which form two lobes with rounded ends, which are minutely 

 serrulated : separated from these by a spine, on each side, is 

 a smaller rounded lobe followed by a spine, and, after a small 

 interval, two other much smaller lobes. The margin beyond 

 these lobes is irregular, and bears a few spines. Each segment 

 of the body has also a few marginal spines. There are five 

 groups of spinnerets : upper group with 6 to 8 orifices ; 

 upper laterals, 20 to 25 ; lower laterals, 25 to 35. There are 

 also, on each side of the groups, three rows of large oval 

 pores. 



Adult male unknown. 



Hab. In New Zealand, on bark of Fuchsia excorticata. 

 My specimens were mostly collected in the neighbourhood of 

 Wellington, but I have a few from Woodville. 



Those who classify species according to colour would pro- 

 bably attach this insect to Chionaspis. But the absence of 

 any trace of a keel on the male puparium is much more im- 

 portant, and according to my regular plan I place it in 

 Mytilaspis. In the inclusion of bark-cells amongst the 

 secretion of the female puparium it approaches M. leptospcrmi, 

 Mask. (1881) ; but the characters of the abdomen separate it 

 from that, and, I think, from all other, species : more especially 

 the terminal median depression. 



Mytilaspis citricola, Packard. 



I have received specimens of this species from Mr. Quinn, on 

 Croton sp. from a hothouse at Adelaide. No mention is made 

 in his letter of any orange or other Citrus trees growing in the 

 house, and it is stated indeed that the insect is " very destruc- 

 tive, and seems confined to Croton chiefly." Specimens have 

 also been sent to me on Banksia integrifolia from Melbourne, 

 by Mr. French. These last are intelligible enough, as they 

 might easily have spread from orange-trees ; but I am not so 



