294 Transactions.— Zoology. 
digitules are only long fine hairs ending in minute knobs. The thoracic 
band occupies about half the width of the body. The abdominal spike is 
long and, as usual, hairy. There is indeed not much difference in the 
males of most species of the Diaspide. The male of Poliaspis is not greatly 
unlike that of Aspidiotus epidendri, or of Diaspis gigas. 
Poliaspis media, which I have from a Veronica and from Leucopogon 
fraseri, is the species alluded to in my former paper,* and which I had not 
then sufficiently examined. 
4. Carosroua, gen. nov. (?). 
The insects which I have just described belong to the group Diaspides 
my next belongs to the group Coccide, subsection Monophlebide. 
In my former paper I mentioned, as characteristic of the group Coccide, 
a bi- or tri-articulate mentum, and in the synopsis attached to this paper I 
give, as a characteristic of the Monophlebide, antenne of eleven joints, a 
number found in no other subsection of the group. The genus Celostoma 
possesses this last character, but it presents the unusual feature of having a 
mouth formed of only a hollow opening, without any mentum, rostrum, or 
buccal sete. 
There is a subsection of the group Coccide known as ** Porphyrophora,” 
Brandt (Porph. polonica used to be much employed in Europe as a dye), 
where not only the rostrum and sets are absent, but there is absolutely in 
the adult female no trace of a mouth at all! In what manner Porphyro- 
phora contrives to extract its nourishment from the plants it lives on I do 
not know. The males of all Coccidex are destitute of mouths, and it may be 
presumed that their office is merely to impregnate the females. But how 
these latter, if mouthless, are enabled to live and grow fat during the period 
of gestation is not clearly intelligible. But as Cwlostoma possesses, at any 
rate, an cesophagal opening, I must include it amongst the Monophlebide ; 
looking on it as perhaps an intermediate genus between Monophlebus and 
Pophyrophora. 
The characters of this genus are, therefore, antenne of eleven joints in 
the adult female, anal tubercles wanting or indistinguishable, an entire 
absence of mentum, rostrum, or buccal setze, but retention of an cesophagal 
opening. 
Celostoma zealandicum, sp. nov. (?) 
Pl. VIL, figs. 6-13. 
The adult female, figs. 6, 7, is briek-red in colour, reaching }-inch in 
length, and rather more than }-inch in breadth at the widest part, which is 
toward the abdominal end. It is fat, corrugated, slug-like: there are eleven 
or twelve corrugations, those toward the head being the widest. It is sur- 
* Trans., Vol. XL, p. 203. 
