﻿HOW 
  INSECTS 
  FLY— 
  SNODGBASS 
  

  

  395 
  

  

  though 
  as 
  lar.sje 
  as 
  the 
  other, 
  bears 
  only 
  the 
  first 
  vein 
  of 
  the 
  wing 
  

   ((7), 
  which 
  has 
  a 
  small, 
  intermediary 
  piece 
  (c) 
  at 
  its 
  base. 
  The 
  axillary 
  

  

  C 
  Sc 
  R 
  

  

  Figure 
  11— 
  Basal 
  structure 
  of 
  wing 
  of 
  a 
  dragon 
  Qy 
  and 
  a 
  May 
  lly, 
  insects 
  that 
  do 
  not 
  flex 
  the 
  

   wings 
  posteriorly 
  over 
  the 
  back. 
  A, 
  Basal 
  part 
  of 
  forewing 
  of 
  a 
  dragon 
  fly 
  (Anax 
  Junius); 
  a, 
  

   detached 
  plate 
  of 
  tergum; 
  AxP, 
  axillary 
  plate; 
  C, 
  costa; 
  c, 
  small 
  sclsrite 
  at 
  base 
  of 
  costa; 
  HP, 
  

   humeral 
  plate; 
  M, 
  media; 
  R. 
  radius; 
  Sc, 
  subcosta; 
  T, 
  tergum. 
  B, 
  Basal 
  part 
  of 
  forewing 
  of 
  

   a 
  Mayfly; 
  Ax, 
  axillary 
  region 
  corresponding 
  with 
  axillary 
  plate 
  of 
  dragon 
  fly's 
  wing 
  (^zP 
  o 
  

   A); 
  other 
  lettering 
  as 
  on 
  A 
  

  

  plate 
  carries 
  the 
  fom- 
  basal 
  shafts 
  of 
  the 
  other 
  wing 
  veins, 
  which 
  are 
  

   all 
  directly 
  attached 
  to 
  it. 
  The 
  humeral 
  plate 
  is 
  hinged 
  to 
  the 
  anterior 
  

  

  