196 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 
measures, In another connection, I myself this year have had 
sent to me from different places in Britain, as doing considerable 
harm, two pests imported with plants from Asia, and another 
introduced in the same way from Central America. 
Keeping in mind this possibility of the introduction of injurious 
forms from other countries, with their chances of gaining a foot- 
ing and spreading, I am always grateful to receive any specimens 
from driftwood or imported timber or saw-mills. 
