226 LARCH. — LIME. 



fvosi-hife on twigs of the same age, as the effects of the frost- 

 bite which had then taken place a few weeks before affected 

 the cells in the bark over a surface of several inches, and the 

 condition of the many injured cells in this case, and of the 

 one or few diseased ones in the other, was very different. This 

 observation merely refers to the complete frost-bite, not to 

 effect of weather on health of the tree. 



Observations as to the state of the precise spot where the 

 mother Chermes has been noticed to be attached by her sucker 

 during oviposition would give much information as to whether 

 any diseased state of tissues was set up by the irritation of 

 suction ; when once the disease has taken the form of an open 

 wound it is very probable that the presence of many of the 

 Chermes, sucking on such young diseased bark as they may 

 find, would increase the commenced disease ; but the great 

 point is the origin. 



This appears, as far as specimens show, to be not a groivth, 

 hut a death ; a spot or spots joined by canals filled with dead, 

 discoloured and disorganised tissue, which may exist for one, 

 or possibly two or three seasons unseen beneath the bark, 

 until the consequent stoppage of sap causes a swelled growth, 

 and the diseased mass, composed of the discoloured cells and 

 passages, and the tumid swellings, is set on foot ; and may be 

 traced forward in section, increasing year by year from its 

 starting-point.* 



LIME. 



Buff-tip Moth. Pygara bucephala, Steph. Cat. 



The caterpillars of this Moth feed on the leaves of the 

 Lime and also on those of the Elm, Oak, and other trees, 

 sometimes doing thereby serious damage. 



The eggs are laid during June or July, in patches of about 



* The above remarks on Larch bHster are offered witli hesitation, as venturing 

 on a subject where those who have better ojaportunity than myself for observa- 

 tions are still in doubt, and therefore I take leave to mention that they are 

 mainly based on specimens forwarded for examination, or observations on 

 Larch in West Gloucestershire ; but not having the opportunity of studying the 

 subject in the large plantations of the North, with the thoroughness requisite for 

 a knowledge of the different developments of the disease, and the different coin- 

 cident circumstances on which alone conclusions can be based, I merely give 

 these points as all I have at iDresent to offer. 



