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 l 9 

 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 p 3 



