﻿19 
  PityO'genes 
  undes. 
  sp., 
  dorsum 
  of 
  male. 
  (Enlarged) 
  

  

  20 
  Dendroctonus 
  terebrans 
  Oliv., 
  side 
  view 
  of 
  head 
  and 
  pro- 
  

  

  thorax. 
  (Enlarged) 
  

  

  174 
  

  

  