﻿124 
  PROCEEDIJSTGS 
  OF 
  IHE 
  FOITRTH 
  ENTOMOT.OGICAL 
  MEETING 
  

  

  minal 
  segments 
  liave 
  spines 
  in 
  places 
  corresponding 
  to 
  the 
  primary 
  

   tubercles 
  of 
  the 
  larva. 
  The 
  spines 
  are 
  broad 
  and 
  have 
  a 
  needle-like 
  

   short 
  thin 
  process 
  arising 
  slightly 
  below 
  the 
  tip. 
  The 
  colour 
  is 
  yellow. 
  

   The 
  spiny 
  pupa 
  is 
  liable 
  to 
  be 
  confused 
  with 
  that 
  of 
  C. 
  S. 
  1835 
  (Plate 
  

   XX 
  fig. 
  la) 
  but 
  can 
  be 
  distinguished 
  by 
  looking 
  at 
  the 
  hind 
  end. 
  

  

  The 
  moth 
  is 
  quite 
  different 
  from 
  that 
  of 
  all 
  the 
  other 
  borers, 
  the 
  

   forewings 
  being 
  white 
  with 
  a 
  broad 
  blackish 
  longitudinal 
  marking 
  in 
  

   the 
  middle. 
  

  

  The 
  seasonal 
  history 
  has 
  been 
  graphically 
  shown 
  in 
  the 
  chart. 
  

   (Plate 
  XX 
  fig. 
  2). 
  The 
  moths 
  appear 
  in 
  June, 
  July 
  and 
  August, 
  

   when 
  eggs 
  are 
  laid. 
  The 
  egg 
  has 
  not 
  been 
  observed. 
  Young 
  cater- 
  

   pillars 
  occur 
  about 
  this 
  time 
  and 
  feed 
  till 
  about 
  November 
  w^hen 
  hiber- 
  

   nation 
  commences 
  inside 
  the 
  bored 
  stems. 
  After 
  hibernation 
  and 
  

   partial 
  aestivation, 
  pupation 
  commences 
  in 
  May 
  and 
  moths 
  appear 
  in 
  

   June. 
  In 
  the 
  Insectary 
  caterpillars 
  have 
  been 
  observed 
  to 
  rest 
  till 
  

   about 
  the 
  middle 
  of 
  October 
  and 
  then 
  die. 
  This 
  prolonged 
  rest 
  may 
  

   indicate 
  that 
  probably 
  some 
  larvse 
  do 
  not 
  pupate 
  till 
  the 
  second 
  year. 
  

   Or 
  it 
  might 
  be 
  due 
  to 
  Insectary 
  conditions. 
  

  

  Hypsotropa 
  tenuinervella. 
  (C. 
  S. 
  1920 
  and 
  2016). 
  

  

  (Plate 
  XXI.) 
  

  

  Foodplant 
  — 
  Katra 
  (Andropogon 
  sqtmrrosi(s). 
  

  

  The 
  seasonal 
  history 
  is 
  graphically 
  shown 
  on 
  Plate 
  XXI, 
  fig. 
  2 
  

  

  The 
  larvse 
  hibernate 
  from 
  about 
  October 
  to 
  about 
  March 
  and 
  are 
  not 
  

  

  affected 
  by 
  dry 
  conditions. 
  In 
  the 
  Insectary 
  moths 
  were 
  observed 
  to 
  

  

  emerge 
  up 
  to 
  9th 
  October 
  1919 
  before 
  the 
  winter 
  and 
  on 
  the 
  14th 
  March 
  

  

  1920 
  after 
  the 
  winter. 
  

  

  The 
  caterpillars 
  are 
  true 
  borers. 
  They 
  are 
  of 
  three 
  different 
  colours- 
  

   Some 
  are 
  red, 
  some 
  are 
  cream 
  coloured 
  and 
  some 
  pale 
  yellow, 
  although 
  

   morphologically 
  they 
  are 
  the 
  same. 
  A 
  full-grown 
  caterpillar 
  is 
  about 
  

   15 
  mm. 
  when 
  stretched 
  and 
  about 
  2-5 
  mm. 
  thick. 
  The 
  head 
  is 
  

   compressed 
  in 
  the 
  dorso-ventral 
  plane, 
  brown 
  and 
  glossy. 
  The 
  protho- 
  

   racic 
  shield 
  is 
  not 
  very 
  distinct, 
  glossy 
  pale 
  brownish-yellow. 
  The 
  

   segments 
  of 
  the 
  body 
  are 
  divided 
  into 
  two 
  subsegments, 
  the 
  anterior 
  

   subsegment 
  being 
  large 
  and 
  the 
  posterior 
  small. 
  The 
  hairs 
  are 
  thin, 
  

   brownish. 
  The 
  spiracles 
  are 
  broadly 
  oval, 
  not 
  exactly 
  round, 
  pale 
  

   yellow 
  with 
  a 
  thin 
  brown 
  rim. 
  The 
  five 
  pairs 
  of 
  prolegs 
  are 
  equally 
  

   developed, 
  the 
  booklets 
  on 
  them 
  being 
  in 
  elongated 
  oval 
  outline. 
  

  

  All 
  turn 
  pale 
  yellow 
  before 
  pupation. 
  

  

  