﻿PROCEEDINGS 
  OF 
  THE 
  FOriiTH 
  ENTO^tOLOGICAL 
  MEETING 
  119 
  

  

  enormous 
  extent 
  that 
  it 
  was 
  difficult 
  to 
  rear 
  out 
  adult 
  flies. 
  About 
  

   20 
  to 
  30 
  grubs 
  of 
  this 
  parasite 
  occur 
  in 
  the 
  body 
  of 
  a 
  single 
  maggot. 
  

   They 
  devour 
  the 
  contents 
  of 
  the 
  body 
  of 
  the 
  maggot 
  by 
  the 
  time 
  the 
  

   latter 
  is 
  full 
  grown 
  and 
  pupate 
  in 
  brownish 
  cocoons 
  formed 
  in 
  a 
  mass 
  

   inside 
  the 
  skin 
  of 
  their 
  host. 
  This 
  cocoon 
  mass 
  is 
  observed 
  on 
  sj)litting 
  

   open 
  the 
  hollow 
  gall. 
  

  

  4. 
  The 
  adult 
  flies 
  are 
  attracted 
  to 
  bright 
  powerful 
  lights. 
  No 
  flies 
  

   were 
  attracted 
  at 
  Eanchi 
  to 
  a 
  light 
  trap 
  improvised 
  with 
  an 
  ordinary 
  

   hurricane 
  lantern 
  and 
  new 
  shining 
  pieces 
  of 
  tin 
  used 
  as 
  reflectors. 
  In 
  

   Madras, 
  on 
  25th 
  October 
  1915, 
  27 
  flies 
  (mostly 
  females) 
  were 
  recorded 
  

   to 
  have 
  come 
  to 
  the 
  Aladdin 
  Incandescant 
  Lamp 
  and 
  between 
  28th 
  

   October 
  and 
  2nd 
  November 
  1915, 
  96 
  females 
  and 
  11 
  males 
  were 
  attracted 
  

   to 
  what 
  is 
  called 
  a 
  P. 
  \V. 
  D. 
  lamp. 
  

  

  Taking 
  the 
  above 
  facts 
  into 
  consideration 
  it 
  is 
  clear 
  that 
  the 
  best 
  

   remedy 
  for 
  the 
  cultivator 
  to 
  adopt 
  is 
  to 
  try 
  to 
  improve 
  the 
  conditions 
  

   by 
  the 
  application 
  of 
  manures, 
  irrigation 
  when 
  necessary 
  and 
  other 
  

   means, 
  so 
  as 
  to 
  bring 
  about 
  a 
  healthy 
  and 
  vigorous 
  growth 
  of 
  side 
  shoots 
  

   •and 
  tillers. 
  

  

  Lychrosis 
  zebrinus, 
  Fb. 
  

  

  (Plate 
  XVIII, 
  fig. 
  1.) 
  

  

  Foodplant— 
  Ba/n 
  {Saccharum 
  spontaneum 
  hatri). 
  

  

  Hibernating 
  larvse 
  were 
  collected 
  in 
  February 
  1920. 
  One 
  pupated 
  

   in 
  May 
  and 
  emerged 
  on 
  16th 
  May 
  1920. 
  The 
  larva 
  resembles 
  that 
  uf 
  

   the 
  Lamiad 
  borer 
  (C. 
  S. 
  1814) 
  described 
  in 
  the 
  first 
  paper. 
  {Proc. 
  Third 
  

   Entl. 
  Meeting, 
  1^.312). 
  

  

  The 
  weevil 
  borer 
  (C. 
  S. 
  1397 
  and 
  2044). 
  

  

  (Plate 
  XVIII, 
  tig. 
  2.) 
  

   Foodplant 
  — 
  Mooiha 
  {Cyperus 
  rotundus). 
  

  

  It 
  has 
  been 
  referred 
  to 
  in 
  the 
  first 
  paper. 
  {Proc. 
  Third 
  Entl. 
  Meeting, 
  

   p. 
  373). 
  The 
  remarks 
  made 
  under 
  Bacira 
  truculenta 
  at 
  page 
  126 
  of 
  

   this 
  volume 
  regarding 
  the 
  foodplant 
  should 
  be 
  seen. 
  This 
  insect 
  has 
  

   not 
  been 
  found 
  in 
  any 
  other 
  food 
  plant. 
  

  

  Eggs 
  are 
  apparently 
  deposited 
  inside 
  the 
  stem 
  near 
  the 
  root-stock. 
  

   The 
  grubs 
  are 
  found 
  right, 
  at 
  the 
  root 
  of 
  the 
  stem 
  at 
  its 
  junction 
  with 
  

   the 
  root-stock. 
  They 
  do 
  not 
  work 
  up 
  the 
  stem 
  but 
  gnaw 
  a 
  large 
  cavity 
  

   at 
  this 
  place 
  thus 
  cutting 
  across 
  the 
  base 
  of 
  almost 
  all 
  the 
  leaves 
  of 
  

   the 
  inner 
  whorls 
  which 
  droop, 
  turn 
  yellow 
  from 
  their 
  spices 
  and 
  ulti- 
  

   mately 
  wither. 
  The 
  cavity 
  the 
  grubs 
  gnaw 
  is 
  filled 
  with 
  black 
  excreta. 
  

   Sometimes 
  the 
  grubs 
  are 
  observed 
  to 
  bore 
  into 
  the 
  root-stocks. 
  

  

  I 
  2 
  

  

  