_> j ,. : Canadian Arctic Expedition, 1913-18 



i:\IM.A\ATiOX OF PLATE II 



1. Bark-beetles. 



Kit;. 1. Cca'phoborusandersoniSw. 



'2. I'olijyriipliuH rnjl[)cnnix Ky. 



l-'iu. :-!. PityopMhorus iiitidn* SA-. 



Ki. I. Pttyophthorus ni.!i<lux Sw., declivity of dyii-M. 



.">. l'it.i/<>i>tit-h(>ntx n'tti<lux Svv. 



l-'iu;. <v DendroctonusjohanseniBvf. 



Tli'rlr:iwin?s:ir(. by Mr. A. Iv KHlrtt, Artist Assistant, Entomological Branch, 

 of Ani'iculturc, ()11a\va. 



