[Footnote 2:  See the annexed drawing, Fig. 1.]

When the young ones come out from their nest, they run about over the plant like diminutive wood-lice, and at this period there is no apparent distinction between male and female.  Shortly after being hatched the males seek the underside of the leaves, while the females prefer the young shoots as a place of abode.  If the under surface of a leaf be examined, it will be found to be studded, particularly on its basil half, with minute yellowish-white specks of an oblong form.[1] These are the larvae of the males undergoing transformation into pupae, beneath their own skins; some of these specks are always in a more advanced state than the others, the full-grown ones being whitish and scarcely a line 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.

[Footnote 1:  Figs. 2, and 3 and 5 in the engraving, where these and all the other figures are considerably enlarged.]

When the transformation is complete, the mature insect makes its way from beneath the pellucid case[1], 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.

[Footnote 1:  Fig. 4.  Mr. WESTWOOD, who observed the operation in one species, states that they escape backwards, the wings being extended flatly over the head.]

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 undersides of the leaves (on the upper surface neither the male nor female ever attach themselves); but, unlike the male, which derives no nourishment from the juices of the tree (the mouth being obsolete in the perfect state), she punctures the cuticle with a proboscis (a very short three-jointed