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Wa IP UTEBNIRUPE PUNIRI mn 
MaskELL.—On some Coccidæ in New Zealand, 211 
as long, and tapers slightly to the claw. All the joints are hairy. The 
upper digitules are not long, and the knobs small; the lower pair are only 
airs. 
The thoracic band occupies nearly the whole width; the wings are 
broad and elliptical, with a single nervure of two branches. The abdomen, 
somewhat long, ends in a single spike shorter than that of the Diaspide. 
This species is very much infested by a hymenopterous parasite which 
takes advantage of its test to lay therein its eggs. A very large number of 
tests will be found to contain, not their proper insects, but pups of this 
parasitic fly which might possibly be mistaken for males of Ctenochiton, I 
have been able to follow the transformation of the parasite, which appears 
to be one of the Proctotrupidz and which I have described in a short paper 
read before you to-night,” 
T. Ctenochiton viridis, sp. nov. 
The differences between this and the last species are not, I think, 
noticeable in the earlier stages, except that the insect when first appearing 
on the leaf with its fringe has not so much of the filmy look of C. perforatus, 
but is yellower and somewhat more solid. The divergence is more apparent 
in the stage of propagation, when C. viridis attains a much larger size, The 
female insect has then a bright green colour, is sometimes j-inch long 
and }-inch wide and pear-shaped, acuminate at the cephalic end. It 
has a repulsive appearance on the underside of the leaf where it forms a 
depression corresponding to its body. I have found it abundant on Co- 
prosma, Panax, and Rubus, near Christchurch, in Riccarton Bush. 
The test, in the earlier stage, resembles that of C. perforatus, being 
glassy, with a fringe of broad segments. At the later stage the fringe 
disappears, and the test, instead of being easily removable as in the last 
species, becomes intimately attached to the insect, so that in order to 
examine it one has to tear and wash away the body and internal organs. 
When this is done it is seen that the rows of segments are more numerous 
than in C. perforatus, the segments themselves smaller, and the oval mark- 
ings on the dividing lines in double rows. Moreover, each segment is 
marked by radiating straight lines crossed by wavy curves, giving it an 
appearance something like the scale of a fish. These lines are not clearly 
to be made out after immersion in a fluid, such as glycerine or Canada 
balsam. 
The fringe is absent at this stage, and there is no sign of the lines of 
perforations characteristic of the Jast species. 
The appearance of a segment of the test is shown in plate VIL, fig. 145. 
> Vide Art. XVII, 
