2 corrEE bug and coffee mildew. 



selves to the cuticle of the plant, for the purpose of undergoing 

 certain transformations, which, being different in the two sexes, 

 will require to be described separately. 



"If the under surface of a young leaf of an infected coffee- 

 tree be examined with the naked eye, it will be found to be 

 studded, particularly on its lower half, Avith a number of minute 

 yellowish white-coloured specks of an oblong form. These are 

 the larva; of the males being transformed into piipcB beneath 

 their own skin. Some of these specks are always in a more 

 perfect state than others, the full-grown ones being of a whitish 

 colour, and scarcely a line long. Of those which are of this 

 size, some have a much more translucent appearance than others ; 

 and if examined with a magnifier, will be found to be empty, the 

 perfect animal having made its escape from it ; but if the darker 

 coloured ones are examined in the same manner, the nearly per- 

 fect insect will be found within it. In this state the animal is 

 of an oblong form, of a yellowish colour, with the rudiment of a 

 wing on each side attached to the lower part of the thorax, and 

 closely applied to the sides. It has six legs, the four hind ones 

 being directed backwards, and the two anterior ones forwards. 

 It has two antennae, which are directed backwards, and from the 

 tail protrude three short bristles, the middle one of which is 

 both thicker and larger than the other two. 



" When the transformation has been completed, and the in- 

 sect has reached its maturity, it makes its way out from beneath 

 the pellucid case by which it was covered. All its organs have 

 then reached their full size. The head is somewhat of a globular 

 form, with two rather prominent black eyes in front, and two 

 long antennae, each with 1 1 joints, hairy throughout, and with a 

 tuft of a few longer hairs at their apices. The legs are also 

 hairy. The wings are horizontal, of an obovate oblong shape, 

 membranous, and a little longer 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 external margin, and is 

 much thicker than the other, which rvms at some distance from 

 the internal margin. Being possessed of wings, the full-grown male 

 is nmch less seldom 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 the young shoots, but 

 she is also to be met with on the margins of the under side of 

 the leaves. On the upper surface neither male nor female ever 

 attach themselves. But unlike the male, which derives no nou- 

 rishment from the juices of the plant, the female, as soon as slie 

 lias fixed herself, punctures the cuticle with a proboscis which 

 she has on her chest, and by which she abstracts the juices that 

 nourish her. In the early pupa state of the female she is easily 



