F. V. TllKoilAI.!) 



•20 



isolated trees, growing on road sides or along the margins of belts and 

 woods, on comparatively low ground, say 300 to 100 feet altitude. I also 

 find the aphis in comparatively large numbers on old trees of white 

 American spruce, but uj) to the present they do not show any very 

 serious results. At Dundrum the Sitka would appear to succundj most 



Fig. 6. 

 Picea excelsa showing denudation on upper portion of .shoot after a year's attack. 



readily to the attack ; in the nursery, however, the Sitka are not affected 

 to the same extent as the spruce, but the latter are larger trees and have 

 been longer in stock than the Sitka." 



Writing from Avondale, Rathdrum, Co. Wicklow, Mr J. Black sent 

 the following list of species attacked : 



P. sitchensis, badly attacked, six years planted, 8 — 10 feet high. 



P. excelsa, attacked to some extent. 



