222 Transactions.— Zoology. 
The admixture of the second pellicle with secretion to form the test 
approaches this genus more nearly to the Diaspide than any others of the 
group. But there can be no mistaking its affinities, for the abdominal cleft 
and lobes of Lecaniwm at once define its position. 
1. Lecanochiton metrosideri, sp. Nov. 
Figs. 18-21 
The young insect, extremely minute, has the general form of Lecanium 
hesperidum : it is flat, oval, brown, or rather reddish, usually found at the 
tips of young shoots. The antenn have six joints (fig. 18) ; on the last 
joint are several hairs, amongst which is one excessively long, slightly 
knobbed. Foot (fig. 19) normal; the joints hairy ; upper digitules fine 
knobbed hairs, lower pair a little broader. 
In the second stage the insect is scarcely altered: the antenn® and feet 
remain as before: but there is a test, white, waxy, very thin, covering the 
dorsal surface, and extending a little beyond the edge in an irregular fringe 
somewhat resembling that of Ctenochiton elongatus (Trans., vol. xi. P- 212, 
pl. vii., fig. 14d). On the edge, also, are a number of protruding spinneret 
tubes, glassy, white, cylindrical, either curved or straight: few of these 
tubes protrude on the surface of the back. The under side of this stage 18 
shown in fig. 20. 
The adult female is covered by a hard, brown test (fig. 21, dorsal view); 
having the general appearance of an overturned basket, the foot of the 
basket being formed by the pellicle of the second stage. This test, convex 
or semi-globular above, is open beneath ; and as the insect, which entirely 
fills the test, approaches its last stage it becomes slightly hollowed below 
as in some other Lecanide: in the cavity thus formed the yours are 
hatched. 
The rostrum is comparatively large; the mentum, I think, monomerous- 
Antenne (fig. 22) short, thick, atrophied; and the seven joints of which 
they are composed are so compressed as to show apparently only three : , 
is not easy to make out the divisions. The last joint has a few hairs. he 
feet are entirely absent, and I have not been able to see macule in place of 
them, as is usual in some other apodous Lecanide. 
On the pellicle at the top of the test may be seen remains of the test of 
the second stage. From this pellicle radiate to the edge four rows of rather 
large spinnerets secreting the test, each row starting from a point opposite 
the stigmata of the pellicle: and on turning over the test there are seen oD 
the underside four corresponding lines of white cotton. 
The skin of the insect is smooth and not tessellated. 
a Ice ng an ee 
