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less contiguous mass, and separates in larger or smaller flakes 
imperfectly. When this occurs, the whole of the epidermis is 
then seen to be marked by minute round pits, from which 
the waxy meal appears to be exuded. The general colour is 
a deep blackish-brown, here and there verging into lurid. 
Mr. Maskell placed the species in the genus Ceelostoma ‘on 
account of the absence of a rostrum” (op. cit. p. 51). and says 
“there is no doubt of its being a Monophlebid,” but it appears 
that this ‘‘ absence” is only apparent in the Monophlebide, for 
both Monophlebus Crawford: and Celostoma australe are known 
to possess a rostrum (sucking tube) of great length, which during 
life is deeply buried in the tissues of the bark of the twigs on 
which the insect is located. When, however, the organ is with- 
drawn it is at the same time retracted into the body ; its extreme 
slenderness and the minuteness of the otherwise unmarked orifice 
rendering it next to impossible to detect its presence. Mr. A. 
Zietz informs me that he has frequently detached living 
Monophlebi from the bark and seen their rostrum retracted, and 
I have noticed in the present instance that the living insect 
(Ccelostoma) had its body closely and immovably fixed to the twig 
by its rostrum, but later, when dead, had its forepart raised and 
the rostrum completely retracted. The “absence” of a rostrum, 
as a distinction, will, therefore, have to be omitted in future. 
The male of C. immane is very insignificant in size compared 
with that of the female, and is provided with two ample wings of 
similarly simple structure as those of C. australe. The body is 
usually black, also the legs, but more or less covered by the thin 
whitish meal already mentioned, which also dusts the wings and 
antenne of the specimens. 
The head contracts posteriorly into a distinct neck. The eyes 
are brown, large, oval, and provided with very numerous, ex- 
tremely minute facets. The antenne are shortly hirsute (?), 
notably the two apical joints, 12jointed ; the basal joint is very 
short, much thicker than long, cup-shaped, the second similiar, 
but thinner and longer ; joints 3, 8, 9 sub-cylindrical, sub-equal, 
each about twice the length of the second ; joints 4-7 and 10 
filiform, subequal, each about twice as long as the preceding ; 11 
and 12 similar, subequal, together a little longer than the preced- 
ing one, the penultimate being the shorter. 
The thorax is uneven, shiningly black ; the mesonotum exhibits 
an oval raised median space convex above ; scutellum indistinct. 
Abdomen rugose, flat, 6 (?) jointed, acuminate, and terminating 
in a slender, flat filament (? penis) twice or more longer than the 
body (this is usually absent from dried specimens, or more or less 
contorted, owing to its extreme slenderness and brittle nature). 
The anterior wings are large, rose-coloured, oval, and about 
two and a-half times longer than wide, but very thin and brittle. 
