332 



FOREST ENTOMOLOGY. 



Chbrmes pice/E (Rtzb.) 



The bark -louse of the silver fir (die Tannenrindenlaus of the 

 German) is very destructive to young silver firs, comparatively young 

 specimens of Abies Nordmanniana, and even fairly old trees of Abies 

 nobilis. Fig. 308 is taken from the bark on a silver fir tree of about 



Fig. 306. Terminal shoot of Scots pine 

 killed by Chermes pini. 



Pig. 307. Chermes corticalis on branch of 

 Weymouth pine. 



thirty years of age. Specimens of young silver fir trees in nursery- 

 lines are often killed outright by this insect. 



It is to be hoped that the above account of the genus Chermes will 

 show that they are of very great importance from an entomological 

 point of view, and that much subsequent study is required in order 



