﻿PROCEEDI>'^GS 
  OF 
  THE 
  rOUUTH 
  ENTOMOLOGICAL 
  MEETING 
  ll5 
  

  

  Key 
  to 
  PupcB 
  of 
  Borers. 
  

  

  TLarval 
  tubercles 
  (bases 
  of 
  hairs) 
  converted 
  into 
  spines 
  

   l-< 
  on 
  the 
  body 
  of 
  the 
  pupa 
  ..... 
  2 
  

  

  Lwithout 
  such 
  spines 
  on 
  pupa 
  ..... 
  3 
  

  

  f 
  The 
  protuberant 
  part 
  of 
  the 
  hind 
  end 
  of 
  pupa 
  is 
  

  

  I 
  broader 
  than 
  long 
  and 
  has 
  two 
  indentations 
  on 
  the 
  

   2 
  J 
  tip, 
  each 
  indentation 
  having 
  in 
  it 
  a 
  short 
  spine 
  

  

  '. 
  surmounted 
  with 
  a 
  hair 
  . 
  . 
  . 
  . 
  . 
  C. 
  S. 
  1835 
  

  

  The 
  protuberant 
  part 
  of 
  the 
  hind 
  end 
  of 
  pupa 
  is 
  

  

  L 
  conical 
  and 
  has 
  no 
  spines 
  of 
  any 
  kind 
  . 
  . 
  . 
  Chilo 
  torrenteUus. 
  

  

  rWithout 
  ridges 
  or 
  hooks 
  or 
  apparent 
  roughness 
  on 
  

   3-^ 
  7th 
  Abdominal 
  segment 
  ..... 
  4 
  

  

  LPupa 
  with 
  such 
  ....... 
  5 
  

  

  ('The 
  hind 
  end 
  having 
  distinct 
  spines. 
  . 
  . 
  . 
  C. 
  S. 
  1677 
  

  

  4J 
  The 
  hind 
  end 
  having 
  no 
  spine. 
  The 
  dorsal 
  part 
  of 
  

  

  I 
  the 
  hind 
  end 
  is 
  protruded 
  and 
  the 
  protruded 
  part 
  

  

  L 
  has 
  a 
  clean 
  rounded 
  margin 
  .... 
  Crambus 
  corticellus. 
  

  

  rWith 
  complete 
  circle 
  of 
  ridges 
  spines 
  or 
  roughness 
  on 
  

   5< 
  7th 
  abdominal 
  segment 
  ..... 
  6 
  

  

  LWith 
  incomplete 
  circle 
  as 
  above 
  .... 
  7 
  

  

  f 
  Circle 
  composed 
  of 
  distinct 
  and 
  separate 
  spines 
  . 
  (C. 
  S. 
  1610) 
  

  

  I 
  Argyria 
  tumidicostalis, 
  

  

  ^'i 
  Circle 
  of 
  flattened 
  ringlike 
  ridges 
  more 
  or 
  less 
  joined 
  

  

  to 
  one 
  another 
  (C. 
  S. 
  1560). 
  

  

  l^ 
  Diatrcea 
  auricilia 
  

  

  rincomplete 
  circle 
  of 
  distinct 
  spines 
  . 
  . 
  . 
  " 
  . 
  C. 
  S. 
  1674. 
  

  

  '^'{ 
  Incomplete 
  circle 
  of 
  roughness 
  without 
  distinct 
  

  

  L 
  spines 
  ........ 
  8 
  

  

  TDorsal 
  half 
  of 
  anal 
  end 
  with 
  six 
  spines 
  in 
  two 
  groups 
  

   8< 
  of 
  three 
  triangularly 
  arranged 
  . 
  . 
  • 
  . 
  . 
  Chilo 
  simplex. 
  

  

  LDorsal 
  half 
  of 
  anal 
  end 
  with 
  four 
  spines 
  ... 
  9 
  

  

  TThe 
  spines 
  situated 
  on 
  dorsal 
  margin 
  and 
  pointing 
  

   9< 
  more 
  or 
  less 
  backwards 
  (dorsally) 
  ... 
  10 
  

  

  LThe 
  spines 
  situated 
  on 
  tip 
  and 
  pointing 
  posteriorly 
  . 
  Diatrcea 
  venosata. 
  

  

  f 
  The 
  ridge 
  of 
  roughness 
  on 
  7th 
  abdominal 
  segment 
  

  

  j 
  extending 
  towards 
  the 
  ventral 
  surface 
  beyond 
  the 
  

   loJ 
  spiracles 
  ... 
  . 
  . 
  . 
  . 
  . 
  • 
  C 
  S. 
  1769. 
  

  

  I 
  Extending 
  up 
  to 
  the 
  spiracles 
  . 
  . 
  . 
  . 
  . 
  C. 
  S. 
  1795. 
  

  

  (_Not 
  extending 
  up 
  to 
  the 
  spiracles 
  . 
  . 
  . 
  . 
  C. 
  S. 
  1831. 
  

  

  Life 
  Histories 
  of 
  the 
  Borers. 
  

  

  Pachydiplosis 
  oryzce. 
  

   This 
  is 
  a 
  small 
  mosquito-like 
  fly 
  the 
  larva 
  of 
  which 
  feeds 
  inside 
  

   rice 
  plants 
  and 
  causes 
  the 
  growth 
  of 
  a 
  long 
  tubelike 
  gall 
  in 
  place 
  of 
  

   the 
  stem. 
  The 
  stem 
  being 
  thus 
  destroyed, 
  the 
  affected 
  plants 
  do 
  not 
  

   produce 
  any 
  ear. 
  This 
  disease 
  has 
  been 
  referred 
  to 
  in 
  the 
  first 
  paper 
  

   and 
  a 
  coloured 
  plate 
  has 
  been 
  given 
  there 
  showing 
  galls 
  and 
  the 
  different 
  

   stages 
  of 
  the 
  fly. 
  The 
  disease 
  has 
  been 
  known 
  to 
  exist 
  in 
  Madras, 
  

   Western 
  Bengal 
  and 
  Bihar 
  and 
  Orissa 
  for 
  a 
  very 
  long 
  time. 
  It 
  is, 
  

   however, 
  only 
  recently 
  that 
  its 
  real 
  nature 
  and 
  the 
  agency 
  causing 
  it 
  

  

  