32 
MEMBRA CIDJE. 
Imago (Plate I. fig. 4, and Plate II. fig. 2).—Pronotum almost semi-circular or 
foliaceous in outline, projecting over the head, pointed behind, flat, formed of two 
laminae rising from the shoulders and then ending sharply at the dorsal ridges. 
Colour, pale yellow or orange, with a broad brown bar rising vertically from the 
head, succeeded by a large, oval brown spot behind, which does not reach the apex 
or the lower margin. 
Tegmina dense brown ; neurations obscure, but can be made out if placed in 
balsam. Wings hyaline. Limbal border obvious. 
Amongst the adult insects in my collection I have some smaller examples 
(Plate II. fig. 2) which measure only 10 x 8 mm., whilst the larger measures 
18 x 15. 
The first are the males. The sex is determined by the form of the last segment 
of the abdomen as seen in Plate II. fig. 26. 
This species is not included in Fairmaire’s list nor in the “ Biologia Cen. Amer.” 
Habitat. —Para, Amazons. Bates Coll. 
Mr. W. F. Kirby thinks this insect is only a variety of flaveola of Germar. It 
certainly is very constant, but variable in size. 
The national collection contains five specimens, from one of which I figure ; and 
the Hope collection at Oxford has seven ; and several similar larger insects are in my 
own cabinet. 
The insects from Surinam are much brighter orange, and their bodies are blacker. 
The male figured is more stramineous, and the body is dusky rufus. 
Details are given of the immature form drawn from a specimen in the British 
Museum (Plate I. fig. 4b). 
Pupa.—T he immature forms of these insects are very unlike those of the perfect 
flies. 
Body almost colourless and dingy white, more or less covered with patches or 
tufts of a white tomentose matter, particularly located about the head and back. 
The pronotum appears in the form of two reniform lobes, which do not project far 
over the back, which is therefore uncovered, exposing the mesonotum. The lobes are 
united in front; abdomen with seven or eight marked somites, each provided with 
two pointed tubercles ending in long black curved bristles or fine spines; legs stout 
and furnished with two jointed tarsi, proving thus the immaturity of the insect. 
The British Museum contains two specimens of unequal size, taken by Mr. C. W. 
Clarke of Trinidad. Each shows the incipient form of the pronotum and also the 
long bristles sprouting from the abdominal rings. 
The wing-cases are obvious, and the strong legs show that in this stage of 
metamorphosis the insect has free locomotion. 
