JO The Green Spruce Apltis 



P. morinda, two years planted, partially defoliated. 



P. rubra, P. alba, six years planted, attacked similar to excelsa. 



P. frmgens, four years planted, attacked quite as badly as sitchensis. 



Fig. 7. 

 Picca pungeus v. kunteri showing aphides but little damaged. 



Single specimens attacked ai'c as [ollows 

 P. orientalis, slightly aifected. 

 P. engelniannii, badly attacked. 

 P. kosteriana, badly attacked. 

 P. glehire, badly aifected. 



