1 7 ° Second Report on hconomic Zoology . 
in two little hooks. The pupa is sometimes found in rough chinks in 
elm bark as high as six feet above the ground. The pupal stage lasts 
all the winter and gives rise to the moth in May and June. 
They are never sufficiently common to do any damage to the 
foliage of the trees upon which the larvae live. Ash is an uncommon 
food-plant. 
The Felted Beech Coccus. 
( Cryytococcus faeji, Barensprung.)* 
Specimens of this pest have been sent from Derwent Hill, Stamford 
Bridge, Yorkshire. 
It is a pest which may spread with great rapidity, the insects 
being readily blown about by the wind. 
A suggestion is made that it would be advisable to have the 
trees sprayed with strong paraffin emulsion or caustic alkali wash. 
It appears from the specimen sent that the smaller boughs are 
attacked as well as the main trunk, so that it is necessary to spray 
the whole tree. 
An account dealing more fully with this very destructive and 
rapidly increasing scale is appended. 
This Beech Coccus has been greatly on the increase in recent 
years, and is causing great damage to beech trees in many parts of 
the county. It is as abundant in Northumberland as in Surrey, and 
in all parts it seems to be sooner or later fatal to the trees. Owing 
to the whiteness of the ovisacs it is a very conspicuous pest, the sacs 
uniting and forming white felted areas, often covering the whole 
trunk of large trees, making them look as if whitewashed. Many 
of the finest beech trees in Surrey have been destroyed by this pest ; 
the bark peels off and the tree gradually dies unless remedies are 
adopted. Besides Northumberland and Durham, it is found as recorded 
above in Yorkshire, and Mr. Newstead records it in Cheshire and the 
Forest of Dean. 
Abroad it is common near Prague, in Bohemia, 
The larvae hatch in September. Those sent from Yorkshire this 
autumn were hatched by August 28th, and kept on coming out until 
September 4th. 
Many of these larvae never see light, as they work their way 
under the old felted sacs and there set up an independent existence. 
They plunge their beaks into the bark and form a white wool over 
* For full information vide Mr. Newstead’ s 
(Bay Society, 1903). 
“ British Coccida\” vol. ii. p. 215, 
