﻿PROCEEDINGS 
  OF 
  THE 
  FOTIRTH 
  EXTOMOLOGICAL 
  MEETING 
  133 
  

  

  into 
  India 
  and 
  therefore 
  advised 
  the 
  adoption 
  of 
  measures 
  against 
  its 
  

   spread. 
  Its 
  occurrence 
  on 
  the 
  Chinsurah 
  Farm, 
  where 
  it 
  was 
  found 
  

   breeding 
  in 
  three 
  fully-grown 
  canes 
  growing 
  in 
  a 
  clump, 
  the 
  canes 
  being 
  

   practically 
  dry 
  and 
  showing 
  characteristic 
  holes 
  emitting 
  dust 
  in 
  their 
  

   basal 
  joints, 
  indicates 
  that 
  this 
  shot-hiole 
  borer 
  may 
  perhaps 
  prove 
  

   to 
  be 
  an 
  occasional 
  pest 
  of 
  cane, 
  possibly 
  more 
  frequently 
  than 
  has 
  been 
  

   noted 
  by 
  us. 
  In 
  Indian 
  Museum 
  Notes, 
  Vol. 
  V, 
  p. 
  74, 
  it 
  is 
  recorded 
  as 
  

   having 
  been 
  found 
  in 
  cane 
  in 
  numerous 
  districts 
  in 
  Bihar 
  and 
  Bengal. 
  

   X. 
  perforans 
  is 
  widely 
  distributed 
  in 
  India 
  and 
  Burma 
  and 
  has 
  been 
  

   recorded 
  as 
  boring 
  in 
  sal 
  {SJiorea 
  robusta), 
  Anogeissus 
  latifolia 
  and 
  Areca 
  

   catechu.'" 
  (Imperial 
  Entomologist's 
  Annual 
  Report 
  for 
  1919-20). 
  

  

  The 
  Flea 
  Beetle 
  Borer 
  (C. 
  S. 
  No. 
  1891, 
  1923 
  and 
  2043). 
  

  

  (Plate 
  XXV, 
  fig. 
  1). 
  

  

  Foodplants 
  — 
  China 
  {Panicum 
  miliaceum). 
  

   Rice 
  {Oryza 
  sativa). 
  

  

  Grubs 
  of 
  this 
  beetle 
  have 
  been 
  observed 
  from 
  about 
  April 
  to 
  August 
  

   to 
  bore 
  into 
  the 
  stems 
  of 
  paddy 
  seedlings 
  and 
  young 
  China 
  plants 
  from 
  

   the 
  side 
  near 
  about 
  the 
  ground 
  level. 
  After 
  gaining 
  access 
  into 
  the 
  

   stem 
  they 
  bore 
  up 
  and 
  down 
  the 
  centre 
  to 
  some 
  extent, 
  filling 
  the 
  tunnel 
  

   with 
  pellets 
  of 
  excreta 
  and 
  causing 
  " 
  dead 
  heart 
  " 
  characteristic 
  of 
  

   all 
  internal 
  borers. 
  The 
  full-grown 
  grubs 
  leave 
  the 
  stems 
  and 
  pupate 
  

   underground, 
  emerging 
  as 
  adults 
  after 
  six 
  to 
  seven 
  days. 
  It 
  is 
  not 
  

   known 
  where 
  eggs 
  are 
  laid 
  but 
  from 
  the 
  habits 
  of 
  the 
  larva 
  it 
  appears 
  

   that 
  they 
  are 
  deposited 
  somewhere 
  near 
  or 
  on 
  the 
  surface 
  of 
  the 
  ground. 
  

   The 
  periods 
  of 
  egg 
  and 
  larval 
  stages 
  are 
  also 
  unknown. 
  From 
  observa- 
  

   tions 
  however 
  it 
  seems 
  that 
  the 
  lifecycle 
  is 
  completed 
  in 
  about 
  three 
  

   weeks. 
  The 
  adult 
  beetles 
  nibble 
  the 
  tissue 
  from 
  the 
  surfaces 
  of 
  

   leaves 
  as 
  all 
  flea 
  beetles 
  are 
  ordinarily 
  observed 
  to 
  do. 
  

  

  The 
  grubs 
  are 
  observed 
  to 
  occur 
  in 
  large 
  numbers 
  in 
  July 
  and 
  August 
  

   and 
  rank 
  as 
  a 
  pest. 
  They 
  however 
  occur 
  in 
  highland 
  loamy 
  soils 
  and 
  

   will 
  be 
  observed 
  to 
  infest 
  millets 
  and 
  varieties 
  of 
  paddy 
  which 
  can 
  be 
  

   grown 
  in 
  such 
  dry 
  lands. 
  

  

  The 
  full-grown 
  grub 
  (which 
  resembles 
  the 
  young 
  grub 
  in 
  appearance) 
  

   is 
  about 
  4 
  mm. 
  long 
  and 
  about 
  0-75 
  mm. 
  across 
  the 
  body 
  which 
  is 
  semi- 
  

   cylindrical 
  in 
  shape 
  being 
  slightly 
  compressed 
  in 
  the 
  dorsoventral 
  plane. 
  

   The 
  head, 
  the 
  prothoracic 
  and 
  anal 
  plates 
  and 
  the 
  three 
  pairs 
  of 
  thoracic 
  

   legs 
  are 
  dark 
  grey 
  or 
  almost 
  black 
  in 
  colour 
  and 
  their 
  surfaces 
  some- 
  

   what 
  glossy. 
  The 
  prothoracic 
  plate 
  is 
  divided 
  by 
  a 
  faint 
  longitudinal 
  

   line 
  which 
  is 
  visible 
  under 
  lens. 
  The 
  general 
  colour 
  of 
  the 
  body 
  is 
  pale 
  

   yellow 
  which 
  deepens 
  to 
  some 
  extent 
  before 
  pupation. 
  The 
  hairs 
  on 
  

   the 
  body 
  are 
  small 
  and 
  they 
  arise 
  from 
  small 
  somewhat 
  glossy 
  grey 
  

  

  E 
  

  

  