21 



F. fraxini (Kaltenbach). In crevices of the bark on the stems and 

 branches of ash trees. Ovisac white, elongate, often con- 

 torted. Female insect brick-red. Male apterous. 



In the genus Cryptococcnn the mature females are practically 

 apodous, the anterior and mid limbs are wanting, while the hinder 

 pair are vestigial. 



C. fcv/i (Biirensprung), On the stems and branches of beech trees. 

 The mature females are enveloped in a loosely felted white 

 sac. Insect honey-yellow. This is the notorious Beech 

 Coccus. 



Keniies is a very anomalous genus, in which the adult females are 

 naked and gall-like. In some of the species well developed limbs 

 are present ; in others the limbs are vestigial. The body is without 

 a trace of the usual posterior lobes. 



K. varift/atus (Gmelin) (fig. 9 a). On the small twigs of 

 oak, where they may well be mistaken for small 

 Cynipid galls. This habit may possibly account for 

 the apparent rarity of the insect, for there is only one 

 British record (Bleane Woods, Heme, Kent). It was 

 taken, on a single occasion only, by the late C. 0. 

 Waterhouse. The mature female is spherical ; smooth and 

 shining ; ochreous or brownish yellow, marbled with dark 

 brown or blackish bands. The antennae and limbs are fully 

 developed, in this species, but can be of little use to the adult 

 insect. 



K. (jiwrrus (Linn.) (fig. 9 b). In crevices of the bark and amongst 

 the crowded adventitious buds on the stems of oak trees. 

 The mature female is of shape of a grape seed ; the anterior 

 extremity (which is buried in a crevice) narrowed; the 

 hind body swollen. Colour yellowish brown to reddish 

 brown, inconspicuously banded with black. Antennae and 

 limbs vestigial. 



The subfamily Dartijlopiincic conta,\ns the so-called "Mealy-Bugs," 

 of which we have three genera occurring in this country. 



The genus i'/it'iiacoccua is distinguished by the presence of nine 

 joints in the antennae of the adult females. The claws usually have 

 a denticle on their inner edge. The males have four caudal fila- 

 ments (fig. 10). 



P. aceris (Signoret). More commonly on gorse ; but occurring also 

 on various trees, including maple, oak, elm, apple, and plum. 

 Mature female pale green, thinly dusted with white mealy 

 secretion. Ovisac white, large and conspicuous. 



The genus Paeiitlncocctis contains species in which the antennae 



