210 Transactions.—Zoology. 
l inch. A rather broad edge runs round the body, on the interior of which 
are seen the numerous circular openings of the spinnerets. The antenna 
and feet do not seem to have changed. There is a small quantity of white 
cottony fibre visible on the under side, but the general appearance is rather 
leathery. 
The test, detached from the insect, is seen to have become thicker and 
more solid than on the young female. It has now the appearance not of a 
translucent film but of a thin cake of cloudy wax. It is still extremely 
brittle, but it does not dissolve when immersed in Canada balsam. The 
whole of the central space, as shown in fig. 18e, is seen to be divided into 
segments, irregular in shape, of which the row along the middle may be 
said to be roughly hexagonal, having next to i& on each side a row of 
elongated pentagons with apices turned outwards and then a third row of 
pentagons with their bases outwards, with a few triangular segments filling 
up the spaces. The divisions between the segments are somewhat thickened, 
and along each runs a line of very small oval marks, possibly spinneret 
orifices. I have not, in this species, observed any symmetrical markings 
on the interior segments, a feature which, I think, distinguishes the next 
species on my list. 
The apices of the first row of pentagons reach nearly to the edge of the 
solid part of the test. The bases of the second row form the edge itself, and 
are in juxtaposition to the segments of the fringe, which are much the same 
as in the earlier stage. In this outer row of pentagons, however, and in the 
fringe are observable certain peculiar markings, shown in figs. 18e and 13f. 
I am not aware of the use of these, which appear to be produced by rows of 
perforations containing air. The effect of them is not without beauty. 
In autumn the female is seen in her last stage. Having produced all her 
young she becomes shrivelled up at the cephalic end of the test in a shape- 
less mass, in which the legs, antenns and abdominal lobes can be dis- 
tinguished with difficulty. 
The male of this species is by no means uncommon. In the spring a 
large proportion of males will be found under tests similar to those of the 
female. The insect is shown in plate VII., fig. 14a. 
The head is somewhat rounder than those of the Diaspide. The eyes 
are small and granular, and there are four pairs of them. The antenna, 
fig. 14a’, are placed at the anterior part; they are long, having nine joints, 
of which the first is very short and thick, the second thin and rather longer, 
the three next each about twice as long as the second, the remainder equal 
to the second and to each other. Every joint has numerous hairs. 
The coxæ are thick, the femora longer and more slender, the tibie still 
longer and thinner, broadening a little to the tarsus which is not quite half 
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