Western White Pine 

 (pinus mnnticola) 



Dendroctonus monticolae - (llruntain Pine Beetle) 



Red Fir 



(Abies magnifies) 



Tetropium ablet is - (Fir Roundhead Borer) 

 Eccoptogaster subscaber - (Fir Girdler) 



The Fir girdler kills young growth and tops of 

 mature trees. 



White Fir 

 (Abies 



Tetropium abietis - (Fir Roundhead Borer) 

 Eccoptogaster (Scolytus) 



subscaber - (Fir Girdler) 



Hylesinus, n. sp. 



The Fir girdler kills young firs and tops of 

 mature trees. 



Ce6ar 



(Libocedrus dccurrens) 



Chrysobothris nixa - (Flat head Borer) 

 Phl^eisinus, ne\v species - 



Phloeosinus kills young growth. 



Douglas Fir 

 (Pseudoteuga taxifolia) 



Dendroctonus pseudotsugae - (Douglas Fir Beetle) 

 Eccoptogaster unispin^suc - (Douglas Fir Girdler) 



The Douglas fir girdler kills young growth. 

 The beetles killing pines, except in specific 

 cases, are well known and considerable data have been 



-18- 



