250 JOURNAL OF THE EOYAL HOETICULTURAI. SOCIETY. 
dead bodies of their parents, and there set up an independent existence. 
They envelop themselves in the white secretion, and after a while cast 
their skins, throwing away their antennae and legs, which are never again 
developed. 
The adult female is a very tiny, yellow, egg-shaped, and legless 
creature, furnished with a well-developed rostrum and filaments. These 
latter are inserted into the hard bark of the Beech sufticiently far to 
enable the insect to suck up the juices of the tree. 
The male is unknown in any stage. 
When specimen or ornamental trees are attacked by this pest the tree 
trunk should be thoroughly scrubbed with soap and water of the propor- 
tions given in No. 4, p. 259. I have found this an excellent remedy, but 
Fig, 111. — Felted Beech Coccus 
{Cryptococciis fagi) on Beech bark (nat. size). 
the secret to success lies in the method of application. Scrub hard and 
rout them out of every cranny and crack is the surest way to success. 
Felted Ash Coccus 
{Aptcrococcits fraxini, Newstead). (Fig. 112.) 
The sacs of this species closely resemble those of the preceding, but, 
as will be seen from the photograph (fig. 112), they remain more isolated, 
and do not form large homogeneous patches as in the case of C. fagi. It 
feeds exclusively upon the Ash, preferring trees of from ten to fifteen years 
old, upon which it sometimes swarms, filling almost every available 
crevice in the bark. It is also common on old trees, but I have never 
met with it in such numbers as upon young and comparatively 
