﻿412 
  

  

  J. 
  W. 
  S. 
  MACFIE 
  AND 
  A. 
  INGRAM. 
  

  

  border 
  is 
  fringed 
  with 
  long 
  and 
  short 
  spines, 
  and 
  bears 
  in 
  the 
  middle 
  of 
  each 
  lateral 
  

   margin 
  a 
  single 
  stout 
  serrated 
  seta. 
  The 
  beard 
  is 
  well 
  developed, 
  composed 
  of 
  about 
  

   ten 
  pairs 
  of 
  branching 
  hairs. 
  The 
  dorsal 
  hairs 
  on 
  the 
  posterior 
  edge 
  of 
  the 
  anal 
  

   segment 
  are 
  long, 
  four 
  to 
  six 
  above 
  and 
  three 
  or 
  four 
  below 
  on 
  each 
  side. 
  The 
  anal 
  

   papillae 
  are 
  very 
  short 
  and 
  rounded, 
  the 
  dorsal 
  pair 
  being 
  slightly 
  the 
  larger. 
  

  

  Pupa. 
  — 
  The 
  pupa 
  is 
  very 
  large, 
  measuring 
  about 
  14 
  mm. 
  when 
  extended, 
  highly 
  

   chitinised, 
  and 
  dark-coloured. 
  The 
  duration 
  of 
  the 
  pupal 
  stage 
  is 
  about 
  five 
  days. 
  

  

  Cephalothorax. 
  The 
  respiratory 
  trumpets 
  (fig. 
  3, 
  b) 
  are 
  about 
  1 
  mm. 
  to 
  1-2 
  mm. 
  

   long 
  ; 
  the 
  ratio 
  of 
  the 
  length 
  of 
  the 
  closed 
  portion 
  (meatus) 
  to 
  the 
  total 
  length 
  of 
  the 
  

   trumpet 
  is 
  about 
  1 
  to 
  1-3. 
  The 
  trumpet 
  is 
  narrow 
  and 
  slightly 
  constricted 
  at 
  its 
  

   base 
  ; 
  it 
  usually 
  expands 
  continuously 
  towards 
  its 
  orifice, 
  which 
  is 
  not 
  very 
  wide, 
  but 
  

   sometimes 
  the 
  distal 
  end 
  is 
  slightly 
  constricted 
  and 
  the 
  lower 
  third 
  somewhat 
  dilated. 
  

   The 
  arrangement 
  of 
  the 
  cephalothoracic 
  setae 
  appears 
  to 
  be 
  similar 
  to 
  that 
  in 
  Aides 
  

   argenteus 
  (Bull. 
  Ent. 
  Res. 
  x, 
  p. 
  162) 
  . 
  There 
  is 
  one 
  very 
  long 
  stout 
  seta 
  on 
  the 
  cephalo- 
  

   thorax, 
  which 
  appears 
  to 
  be 
  the 
  superior 
  post-ocular 
  seta 
  ; 
  the 
  median 
  and 
  inferior 
  

   setae 
  of 
  this 
  group 
  appear 
  to 
  be 
  situated 
  close 
  together 
  and 
  are 
  delicate, 
  relatively 
  

   short, 
  single 
  or 
  double. 
  Antero 
  thoracic 
  setae 
  : 
  lower 
  anterior 
  moderately 
  long, 
  

   divided 
  into 
  two 
  or 
  three 
  branches 
  ; 
  upper 
  anterior 
  delicate, 
  rather 
  longer, 
  single 
  ; 
  

   lower 
  posterior 
  small, 
  single 
  ; 
  upper 
  posterior 
  rather 
  long, 
  single. 
  Dorsal 
  seta 
  

   delicate, 
  rather 
  long, 
  single 
  or 
  double. 
  Supra-alar 
  seta 
  delicate, 
  moderately 
  long, 
  

   single. 
  Postero-thoracic 
  setae 
  : 
  internal, 
  median, 
  and 
  external 
  moderately 
  well 
  

   developed 
  and 
  divided 
  into 
  two 
  or 
  three 
  branches. 
  

  

  Fig. 
  3. 
  Pupa 
  of 
  Megarhinus 
  brevipalpis, 
  Theo. 
  : 
  a, 
  

  

  b, 
  b 
  ', 
  respiratory 
  trumpets. 
  

  

  dorsal 
  view 
  of 
  abdomen 
  

  

  Abdomen. 
  The 
  paddles 
  (fig. 
  3, 
  a) 
  are 
  large 
  ; 
  the 
  greatest 
  length 
  being 
  a 
  little 
  

   over, 
  and 
  the 
  greatest 
  breadth 
  a 
  little 
  under 
  2 
  mm., 
  the 
  ratio 
  being 
  1-1 
  to 
  1. 
  The 
  

   midrib 
  is 
  well 
  developed 
  and 
  divides 
  the 
  paddle 
  into 
  two 
  unequal 
  parts, 
  the 
  external 
  

   portion 
  being 
  larger 
  and 
  longer 
  than 
  the 
  internal. 
  There 
  are 
  no 
  setae 
  at 
  the 
  distal 
  

   end 
  of 
  the 
  midrib. 
  The 
  external 
  buttress 
  is 
  moderately 
  well 
  developed. 
  The 
  paddle 
  

   bears 
  a 
  short 
  fringe 
  which, 
  however, 
  extends 
  forwards 
  on 
  the 
  external 
  border 
  only 
  a 
  

   short 
  distance 
  (about 
  one-third 
  of 
  the 
  external 
  border). 
  The 
  surface 
  of 
  the 
  paddles 
  

  

  