Chap. XII.] THE COFFEE-BUG. 437 
long. Some of this size are translucent, the insect 
having escaped ; the darker ones still retain it within, 
of an oblong form, with the rudiment of a wing on each 
side attached to the lower part of the thorax and closely- 
applied to the sides ; the legs are six in number, the 
four hind ones being directed backwards, the anterior 
forwards (a peculiarity not common in other insects) ; 
the two antennae are also inclined backwards, and from 
the tail protrude three short bristles, the middle one 
thinner and longer than the rest. 
When the transformation is complete, the mature 
insect makes its way from beneath the pellucid case 
all its organs having then attained their full size : the 
head is sub-globular, with two rather prominent black 
eyes, and two antennae, each with eleven joints, hairy 
throughout, and a tuft of rather longer hairs at the 
apices ; the legs are also covered with hairs, the wings 
are horizontal, of an obovate oblong shape, membranous, 
and extending a little farther than the bristles of the 
tail. They have only two nerves, neither of which 
reaches so far as the tips ; one of them runs close to the 
costal margin, and is much thicker than the other, 
which branches off from its base and skirts along the 
inner margin; behind the wings is attached a pair of 
minute halteres of peculiar form. The possession of 
wings would appear to be the cause why the full-grown 
male is more rarely seen on the coffee bushes than the 
female. 
The female, like the male, attaches herself to the 
surface of the plant, the place selected being usually 
1 Fig. 4. Mr. Westwood, who backwards, the wings being ex- 
observed the operation in one tended flatly over the head, 
species, states that they escape 
F F 3 
