﻿Plate 
  31 
  

  

  ^r 
  

  

  ^^T 
  

  

  1 
  Halesus 
  bostis 
  Hagen 
  

  

  2 
  Halesus 
  species 
  

  

  Drawings 
  by 
  Mrs 
  J. 
  H. 
  Comstock 
  

  

  CADDIS 
  FLIES 
  

  

  