﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  

  

  433 
  

  

  

  Fig. 
  8 
  Group 
  recognition 
  characters 
  for 
  dragon 
  fly 
  nymphs. 
  B 
  and 
  D, 
  labium 
  and 
  end 
  of 
  abdo- 
  

   men 
  of 
  Anax 
  Junius 
  Dru. 
  (Aeschninae) 
  Aand 
  C, 
  labium 
  and 
  end 
  of 
  abdomen 
  of 
  Peri 
  themls 
  

   domitia 
  Dru. 
  (Libellulinae) 
  

  

  €^,C%, 
  

  

  Fig. 
  9 
  The 
  wings 
  of 
  Gomphus 
  descriptus 
  Banlcs. 
  Cco^ta; 
  fife 
  subcosta 
  ; 
  12 
  radius 
  ; 
  iJs 
  radial 
  sector 
  ; 
  If 
  media; 
  

   Cu 
  cubitus; 
  A 
  anal 
  vein; 
  n 
  nodus; 
  br 
  bridge; 
  o 
  oblique 
  vein; 
  sn 
  subnodus; 
  st 
  stigma: 
  ar 
  arculus 
  ; 
  t 
  triangle; 
  

   t' 
  subtriangle 
  ; 
  s 
  supratriangle 
  : 
  m 
  membraniile. 
  Branches 
  of 
  media, 
  cubitus 
  and 
  anal 
  vein 
  membered 
  at 
  the 
  wing 
  mar- 
  

   gin. 
  The 
  dotted 
  line 
  in 
  the 
  base 
  of 
  the 
  subcostal 
  space 
  indicates 
  the 
  position 
  of 
  the 
  basal 
  subcostal 
  cross 
  vein 
  wheu 
  

   developed. 
  

  

  