28 



The Green Spruce Aphis 



a large needled, very glaucous form (Fig. 7) had some amount of aphis 

 on three specimens, but two were affected scarcely at all and the aphis 

 increased very slowly, the third however, which had been previously 

 damaged by accident, was badly infested with this insect. All the other 



Fig. 5. 



Sitka Spruce attacked by Aphis abieiinu Walker. Early stage showing 



needles turning brown and falling. 



English records I have are on P. excelsa. Writing from Dundrum, 

 Co. Tipperary, Mr A. McRae says, " I find the common spruce of all 

 ages, from nursery stock to matured trees of 80 years or over, are badly 

 infested. On matured spruce the effects are most marked on partially 



