﻿390 
  Explanation 
  of 
  Plates. 
  

  

  Tig. 
  6. 
  Portion 
  of 
  denuded 
  wing-membrane 
  seen 
  on 
  the 
  flat, 
  X 
  310. 
  

  

  a, 
  a. 
  Sockets 
  of 
  ordinary 
  scales 
  of 
  upper 
  surface. 
  

  

  b, 
  b. 
  „ 
  „ 
  „ 
  lower 
  surface. 
  

  

  c, 
  c. 
  Sockets 
  of 
  scent-scales. 
  

  

  d. 
  Upper 
  lip 
  with 
  chitinous 
  spmes. 
  

  

  e. 
  Darli 
  opaque 
  area 
  of 
  socket. 
  

  

  Fig. 
  6, 
  Socket 
  of 
  scent-scale 
  with 
  engaged 
  accessory 
  disc, 
  seen 
  on 
  

   the 
  flat, 
  X 
  500. 
  

  

  a. 
  Accessory 
  disc 
  in 
  outlme. 
  

  

  b. 
  Aperture 
  of 
  accessory 
  disc. 
  

  

  c. 
  Socket, 
  showing 
  upper 
  lip 
  with 
  chitinous 
  spines. 
  

  

  Fig. 
  7. 
  Transverse 
  section 
  of 
  socket 
  of 
  scent-scale 
  with 
  accessory 
  

   disc 
  in 
  place, 
  X 
  500. 
  

  

  a. 
  Wing- 
  membrane. 
  

  

  6. 
  Socket. 
  

  

  c. 
  Accessory 
  disc 
  lodged 
  in 
  socket. 
  

  

  