﻿166 
  J. 
  W. 
  S. 
  MACFIE. 
  

  

  the 
  postero-internal 
  seta. 
  It 
  is 
  a 
  rather 
  long 
  delicate 
  seta, 
  directed 
  outwards 
  or 
  

   forwards 
  and 
  outwards 
  ; 
  usually 
  single, 
  sometimes 
  double. 
  This 
  seta 
  may 
  correspond 
  

   to 
  A" 
  on 
  the 
  second 
  segment. 
  

  

  Postero-external 
  seta. 
  A 
  rather 
  long 
  seta 
  situated 
  close 
  by 
  and 
  external 
  to 
  the 
  

   postero-internal 
  seta, 
  directed 
  outwards 
  or 
  forwards 
  and 
  outwards 
  ; 
  usually 
  single, 
  

   sometimes 
  double. 
  This 
  seta 
  may 
  correspond 
  to 
  A' 
  on 
  the 
  second 
  segment. 
  

  

  Lateral 
  seta. 
  A 
  small 
  seta 
  external 
  to 
  the 
  postero-external 
  seta 
  and 
  situated 
  

   just 
  posterior 
  to 
  the 
  angle 
  made 
  by 
  the 
  -border 
  of 
  the 
  segment 
  curving 
  inwards 
  ; 
  

   directed 
  outwards 
  ; 
  single. 
  This 
  seta 
  seems 
  to 
  correspond 
  to 
  A 
  on 
  the 
  more 
  distal 
  

   segments. 
  

  

  Segment 
  II. 
  

  

  A 
  — 
  short, 
  fairly 
  stout 
  but 
  not 
  very 
  highly 
  chitinised 
  ; 
  single. 
  A' 
  and 
  A" 
  — 
  there 
  

   are 
  two 
  long, 
  delicate 
  setae 
  situated 
  close 
  by 
  and 
  internal 
  to 
  the 
  lateral 
  seta, 
  the 
  

   one 
  (A") 
  slightly 
  anterior 
  to 
  the 
  other 
  (A'); 
  both 
  usually 
  single 
  or 
  double. 
  In- 
  

   delicate 
  seta 
  of 
  moderate 
  length; 
  single, 
  double, 
  or 
  triple. 
  B— 
  small 
  delicate 
  

   tuft 
  of 
  two 
  to 
  five 
  hairs 
  situated 
  a 
  little 
  anterior 
  and 
  internal 
  to 
  B. 
  C 
  — 
  a 
  rather 
  

   long 
  seta 
  situated 
  internally 
  to 
  B 
  and 
  B', 
  and 
  near 
  the 
  posterior 
  margin 
  of 
  the 
  

   segment; 
  single, 
  occasionally 
  double. 
  C" 
  — 
  a 
  seta 
  of 
  moderate 
  length 
  situated 
  at 
  

   about 
  the 
  same 
  level 
  as 
  B', 
  but 
  internal 
  to 
  it, 
  and 
  slightly 
  either 
  internal 
  or 
  external 
  

   to 
  C 
  ; 
  single. 
  Nearer 
  the 
  middle 
  line 
  than 
  C, 
  and 
  near 
  the 
  posterior 
  margin 
  of 
  

   the 
  segment, 
  is 
  a 
  seta 
  of 
  moderate 
  size 
  which 
  may 
  represent 
  C 
  displaced 
  inwards 
  ; 
  

   usually 
  double 
  or 
  triple, 
  occasionally 
  single. 
  D 
  — 
  a 
  minute 
  seta. 
  

  

  Segment 
  III. 
  

  

  A- 
  — 
  short 
  and 
  stout, 
  rather 
  longer 
  and 
  stronger 
  than 
  on 
  the 
  second 
  seg- 
  

   ment; 
  single. 
  A' 
  — 
  a 
  long 
  delicate 
  seta 
  situated 
  anterior 
  and 
  internal 
  to 
  A; 
  single 
  

   or 
  occasionally 
  double. 
  B 
  — 
  seta 
  of 
  moderate 
  length 
  ; 
  single, 
  double, 
  or 
  occasionally 
  

   triple. 
  B' 
  — 
  small 
  tuft 
  of 
  two 
  to 
  four 
  hairs 
  or 
  a 
  single 
  seta, 
  anterior 
  and 
  internal 
  

   to 
  B. 
  C 
  — 
  a 
  seta 
  of 
  moderate 
  size 
  situated 
  near 
  the 
  posterior 
  margin 
  of 
  the 
  segment 
  

   a 
  little 
  internal 
  to 
  the 
  line 
  of 
  the 
  sub-median 
  row 
  ; 
  usually 
  single 
  or 
  double, 
  but 
  

   occasionally 
  with 
  as 
  many 
  as 
  five 
  branches 
  C 
  — 
  a 
  rather 
  long 
  seta 
  situated 
  at 
  some 
  

   distance 
  externally 
  to 
  C, 
  and 
  anterior 
  to 
  it; 
  single 
  or 
  double. 
  C" 
  — 
  a 
  small 
  seta, 
  

   relatively 
  stout, 
  placed 
  more 
  anteriorly 
  but 
  less 
  exteriorly 
  than 
  C 
  ; 
  single. 
  

   D 
  — 
  a 
  minute 
  seta. 
  

   Segment 
  IV. 
  

  

  A 
  — 
  short 
  and 
  stout, 
  rather 
  longer 
  than 
  on 
  the 
  third 
  segment 
  ; 
  single. 
  A' 
  — 
  a 
  long 
  

   delicate 
  seta 
  situated 
  anterior 
  and 
  internal 
  to 
  A 
  ; 
  usually 
  single, 
  occasionally 
  double 
  

   or 
  triple. 
  B 
  — 
  a 
  long 
  seta 
  reaching 
  half-way 
  or 
  further 
  across 
  the 
  fifth 
  segment 
  ; 
  

   single. 
  B' 
  — 
  a 
  small 
  seta 
  anterior 
  and 
  internal 
  to 
  B 
  ; 
  single, 
  double, 
  or 
  triple. 
  C 
  — 
  ■ 
  

   a 
  delicate 
  seta 
  of 
  moderate 
  length 
  ; 
  single 
  or 
  double. 
  C 
  — 
  a 
  seta 
  of 
  moderate 
  length 
  

   external 
  and 
  anterior 
  to 
  C 
  ; 
  double 
  or 
  triple. 
  C" 
  — 
  a 
  small 
  rather 
  stouter 
  seta 
  

   internal 
  and 
  anterior 
  to 
  C 
  ; 
  single. 
  D 
  — 
  a 
  minute 
  seta. 
  

  

  Segment 
  V. 
  

  

  A 
  — 
  stout, 
  longer 
  than 
  on 
  the 
  fourth 
  segment 
  ; 
  single. 
  A' 
  — 
  a 
  long 
  delicate 
  seta 
  

   anterior 
  and 
  internal 
  to 
  A 
  ; 
  single, 
  occasionally 
  double. 
  B 
  — 
  a 
  long 
  seta 
  reaching 
  

  

  