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  BRITISH 
  LEPIDOPTEKA. 
  

  

  yet 
  it 
  is 
  easy 
  to 
  see 
  that 
  each 
  cell 
  contains 
  a 
  central 
  spot 
  (probably 
  

   raised 
  as 
  an 
  incipient 
  spicule). 
  Passing 
  in 
  the 
  other 
  direction, 
  i.e., 
  

   forwards 
  into 
  the 
  solid 
  and 
  ribbed 
  portion 
  of 
  the 
  segment, 
  the 
  surface 
  

   is 
  seen 
  to 
  be 
  divided, 
  in 
  precisely 
  the 
  same 
  way, 
  by 
  raised 
  lines 
  into 
  cells 
  

   of 
  the 
  same 
  size 
  and 
  form, 
  as 
  those 
  of 
  the 
  intersegmental 
  membrane, 
  

   excepting 
  that 
  the 
  cells 
  are 
  more 
  usually 
  hexagonal, 
  and 
  are 
  more 
  

   often 
  formed 
  by 
  lines 
  between 
  the 
  transverse 
  lines 
  than 
  by 
  simple 
  

   anastomosis. 
  These 
  cells 
  are 
  dark 
  in 
  tint, 
  i.e., 
  darker 
  than 
  the 
  dividing- 
  

   lines, 
  and, 
  in 
  the 
  centre 
  of 
  each, 
  there 
  is 
  a 
  large 
  transparent 
  (or 
  pale) 
  

   spot, 
  giving 
  the 
  appearance 
  of, 
  and 
  probably 
  being, 
  a 
  pit, 
  that 
  is 
  

   more 
  easily 
  seen 
  than 
  the 
  cell 
  containing 
  it. 
  It 
  occupies 
  almost 
  the 
  

   whole 
  width 
  of 
  the 
  cell, 
  but 
  leaves 
  its 
  ends 
  unoccupied, 
  the 
  cells 
  being 
  

   as 
  noted, 
  longer 
  (transversely 
  to 
  segment) 
  than 
  wide. 
  In 
  the 
  centre 
  

   and 
  forward 
  part 
  of 
  the 
  segment, 
  this 
  is 
  less 
  so, 
  and 
  the 
  hollows 
  occupy 
  

   so 
  much 
  of 
  the 
  cells, 
  that 
  the 
  unoccupied 
  portion 
  of 
  the 
  cell 
  is 
  not 
  

   easily 
  distinguished 
  from 
  the 
  lines 
  dividing 
  the 
  cells. 
  At 
  the 
  anterior 
  

   margin 
  of 
  the 
  segment, 
  the 
  pits 
  are 
  wanting, 
  and 
  the 
  cells 
  and 
  lines 
  

   dividing 
  them 
  are 
  a 
  little 
  obscure, 
  but 
  there 
  are 
  present 
  numerous 
  fine 
  

   points 
  or 
  spicules 
  ; 
  these 
  arise, 
  not 
  from 
  the 
  centres 
  of 
  the 
  cells, 
  but 
  

   from 
  the 
  angles 
  where 
  the 
  lines 
  dividing 
  them 
  meet. 
  Laterally 
  they 
  

   occupy 
  three 
  or 
  four 
  rows 
  of 
  the 
  larger 
  ribs, 
  ventrally 
  eight 
  or 
  nine, 
  

   dorsally 
  three 
  or 
  four. 
  The 
  2nd 
  and 
  3rd 
  legs, 
  with 
  the 
  proboscis, 
  form 
  

   a 
  free 
  continuation 
  of 
  the 
  appendages 
  nearly 
  as 
  far 
  as 
  the 
  end 
  of 
  the 
  

   5th 
  abdominal 
  segment 
  (all 
  are 
  fixed, 
  as 
  usual, 
  to 
  the 
  end 
  of 
  the 
  3rd 
  

   abdominal 
  segment). 
  Though 
  the 
  pupa 
  is 
  so 
  smooth, 
  there 
  are 
  the 
  

   usual 
  tubercular 
  hairs, 
  minute 
  clubbed 
  batons, 
  those 
  on 
  i 
  and 
  iii 
  directed 
  

   forwards, 
  on 
  ii 
  backwards, 
  those 
  on 
  the 
  lateral 
  and 
  ventral 
  ones 
  (on 
  

   exposed 
  surfaces) 
  seem 
  to 
  be 
  all 
  present 
  ; 
  length 
  of 
  that 
  on 
  vii 
  about 
  

   O045mm., 
  of 
  the 
  others 
  about 
  0-04mm. 
  These 
  batons 
  are 
  short 
  and 
  

   curved 
  (those 
  on 
  vii 
  are 
  rather 
  longer 
  and 
  straighter), 
  thickest 
  at 
  their 
  

   ends, 
  and 
  colourless 
  ; 
  they 
  are 
  of 
  the 
  same 
  character 
  as 
  those 
  on 
  the 
  

   pupas 
  of 
  Agdistis, 
  Adactylus, 
  and 
  Platyptilia, 
  indeed, 
  by 
  comparison, 
  

   the 
  hairs 
  of 
  the 
  pupse 
  of 
  Platyptilia, 
  though 
  short, 
  thick, 
  and 
  blunt- 
  

   pointed, 
  are 
  ordinary 
  hairs, 
  since 
  they 
  taper 
  equally 
  for 
  their 
  whole 
  

   length, 
  whilst 
  these 
  are 
  apically 
  distended. 
  Strictly, 
  though 
  Platyptilia 
  

   associates 
  itself 
  with 
  Stenoptilia 
  and 
  Agdistis 
  in 
  the 
  minuteness 
  of 
  the 
  

   tubercular 
  hairs 
  of 
  the 
  pupa, 
  it 
  does 
  not 
  do 
  so 
  in 
  the 
  form 
  to 
  more 
  

   than 
  a 
  very 
  slight 
  degree. 
  The 
  hairs 
  on 
  the 
  pro-. 
  and 
  mesothorax, 
  and 
  

   on 
  the 
  vertex, 
  are 
  even 
  smaller, 
  but 
  are 
  clubbed 
  in 
  form. 
  The 
  1st 
  legs 
  

   end 
  at 
  about 
  the 
  end 
  of 
  the 
  wings 
  (end 
  of 
  3rd 
  abdominal 
  segment); 
  the 
  

   proboscis 
  is 
  hidden 
  beneath 
  them 
  towards 
  their 
  tips, 
  and, 
  though 
  

   exposed 
  beyond 
  them, 
  is 
  not 
  very 
  distinct 
  till 
  towards 
  its 
  extremity, 
  

   where 
  it 
  is 
  apt 
  to 
  be 
  more 
  tinted. 
  The 
  forward 
  set 
  of 
  cremastral 
  

   hooks 
  contains 
  about 
  40 
  in 
  number 
  on 
  each 
  side, 
  and 
  the 
  terminal 
  set 
  

   is 
  apparently 
  more 
  numerous, 
  but 
  they 
  are 
  so 
  crowded 
  and 
  obscured 
  

   by 
  silk, 
  that 
  actual 
  counting 
  appears 
  hopeless. 
  The 
  form 
  of 
  the 
  hooks 
  

   is 
  a 
  little 
  special. 
  It 
  is 
  as 
  though 
  the 
  end 
  of 
  a 
  needle 
  had 
  been 
  bent 
  

   back 
  round 
  a 
  fine 
  rod, 
  and 
  the 
  new 
  end 
  then 
  sharpened, 
  but 
  there 
  

   remains 
  a 
  rounded 
  hollow 
  in 
  the 
  concavity 
  of 
  the 
  bend 
  where 
  the 
  

   supposed 
  rod 
  was 
  used 
  to 
  bend 
  them 
  round; 
  in 
  a 
  few 
  instances 
  it 
  

   is 
  a 
  little 
  closed 
  up. 
  Amongst 
  the 
  forward 
  hooks 
  the 
  surface 
  is 
  finely 
  

   spiculated; 
  their 
  length 
  is 
  about 
  0'06mm. 
  The 
  hindwing 
  reaches 
  just 
  

   past 
  the 
  spiracle 
  of 
  the 
  2nd 
  abdominal 
  segment 
  ; 
  the 
  spiracle 
  has 
  the 
  usual 
  

   appearance 
  of 
  being 
  thrust 
  back. 
  The 
  forewing 
  has 
  the 
  usual 
  long 
  point 
  

  

  