222 Transactions.—Zoology. 
The spinnerets are not arranged in rows, but scattered in great numbers 
over the whole body. The vast majority of them are small and circular, 
but round the edge of the body, amongst the tufts of hairs, runs a row of 
others much larger. These protrude some distance from the body; their 
lower end being brown, with a sort of crown encircling it, from which 
springs a long glassy tube. Some of these spinnerets and a tuft of hairs 
are shown in fig. 20¢. 
The feet and digitules, fig. 20e, resemble those of the young insect, but 
the antenne have now nine joints, all nearly equal, the last joint smaller, 
comparatively, than in the young; the hairs of the antenns are also 
shorter. 
In its third stage (fig. 21), the insect acquires its very peculiar appearance 
and afterwards ehanges no more. The feet are much the same as before; the 
antenne have now eleven joints, tapering slightly to the tip, and all some- 
what more hairy than in the last stage; fig. 20d. The tufts of hairs are still 
at the edge; the spinnerets are still more numerous than in the earlier 
stages. 
The general colour of the inseet is now a rusty brown, but it is so 
covered with cottony down as to seem, in the latest period, nearly white. 
All round the edge, especially at the abdominal end, runs a row of black 
marks (the tufts of hair spoken of above), and just within it a fainter line. 
At the commencement of this stage the insect lies flat on the leaf or twig, 
but its edge is slightly raised all round, whilst along the middle of the upper 
side of the thoracie portion is a raised hump, or rather a prominence 
divided into three humps. A white meal covers the back, and all round the 
edge is seen a narrow ring of white felted cotton. This is the commence- 
ment of the large ovisac or nest, in which the young insects are enveloped. 
Later on the female begins to proereate. The body becomes full of eggs, 
and these are ejected into the ovisae, which is gradually becoming larger. 
The insect now begins to be raised up; the cephalie end still remains 
attached to the plant, but the abdominal end is elevated, and the space left 
is filled with the cottony down of the ovisae. At the same time, white 
cottony processes form at the edge of the thorax, over the feet, looking, in 
fact, to the naked eye, as if they were actually attached to the leg. Long, 
fine, translucent white hairs or spines radiate from the body in every 
direction. The general colour of the insect is still brown, powdered with 
white. 
The female at length reaches her full development. Now the abdominal 
end is still more raised, so that the insect has the appearance of standing on 
its head. The ovisae attains its full size, and extends for some distance 
behind the body, filling also the space between it and the plant, as shown 
