﻿PROCEEDINGS 
  OF 
  THE 
  FOURTH 
  ENTOMOLOGICAL 
  MEETING 
  

  

  129 
  

  

  Rhyssemus 
  germanus 
  (C. 
  S. 
  1204). 
  

  

  (Plate 
  XXIII, 
  fig. 
  3.) 
  

  

  Foodplant 
  — 
  Larvae 
  found 
  among 
  mootha 
  [Cyperus 
  rotundus) 
  and 
  indigo 
  

  

  roots. 
  

  

  This 
  is 
  a 
  small 
  beetle 
  but 
  their 
  small 
  size 
  is 
  more 
  than 
  made 
  up 
  for 
  

   by 
  the 
  numbers 
  in 
  which 
  they 
  occur. 
  The 
  seasonal 
  history 
  is 
  not 
  under- 
  

   stood 
  quite 
  well 
  yet. 
  Probably 
  there 
  are 
  several 
  generations 
  in 
  the 
  

   hot 
  weather 
  and 
  in 
  the 
  rains, 
  the 
  cold 
  weather 
  being 
  passed 
  in 
  hiberna- 
  

   tion. 
  In 
  the 
  hot 
  weather 
  from 
  about 
  March 
  to 
  June 
  enormous 
  

   numbers 
  of 
  the 
  adult 
  beetle 
  fly 
  about 
  in 
  the 
  air 
  at 
  dusk. 
  

  

  AUssonotum 
  impressicolle. 
  

   (Plate 
  XXIV, 
  fig. 
  1.) 
  

  

  The 
  occurrence 
  of 
  this 
  beetle 
  on 
  sugarcane 
  in 
  the 
  Kamrup 
  Farm 
  

   has 
  been 
  referred 
  to 
  above 
  when 
  dealing 
  with 
  the 
  external 
  agents 
  of 
  

   damage. 
  The 
  beetles 
  collected 
  in 
  the 
  second 
  week 
  of 
  May 
  1919 
  were 
  

   brought 
  down 
  to 
  Pusa. 
  When 
  collected 
  they 
  were 
  kept 
  with 
  moist 
  

   earth 
  in 
  a 
  perforated 
  zinc 
  cage 
  and 
  pieces 
  of 
  thick 
  cane 
  stems 
  were 
  

   supplied 
  as 
  food. 
  They 
  ate 
  voraciously, 
  boring 
  into 
  the 
  pieces 
  of 
  cane. 
  

   On 
  arrival 
  at 
  the 
  Pusa 
  Insectary, 
  216 
  beetles 
  were 
  distributed 
  on 
  30th 
  

   May 
  in 
  two 
  glass 
  jars, 
  108 
  in 
  each, 
  the 
  jars 
  being 
  filled 
  with 
  moist 
  earth 
  

   under 
  which 
  sugarcane 
  setts 
  and 
  shoots 
  were 
  placed 
  as 
  food. 
  Between 
  

   3rd 
  June 
  and 
  1st 
  August, 
  21 
  beetles 
  were 
  observed 
  to 
  come 
  up 
  to 
  the 
  

   surface 
  of 
  the 
  earth 
  one 
  or 
  two 
  at 
  a 
  time 
  and 
  at 
  intervals 
  of 
  several 
  

   days 
  and 
  die 
  there. 
  This 
  was 
  probably 
  due 
  to 
  overcrowding. 
  Other- 
  

   wise 
  they 
  were 
  resting 
  and 
  did 
  not 
  feed. 
  On 
  20th 
  October 
  1919 
  the 
  

   jars 
  were 
  searched 
  ; 
  54 
  beetles 
  were 
  alive 
  and 
  68 
  eggs 
  found 
  laid 
  

   in 
  the 
  earth. 
  Of 
  these 
  68 
  eggs 
  : 
  — 
  

  

  2 
  hatched 
  

  

  2 
  

   2 
  

   2 
  

   2 
  

   4 
  

   2 
  

   20th-21st 
  October.- 
  

  

  1 
  hatched 
  

  

  2 
  „ 
  

   4 
  „ 
  

  

  3 
  „ 
  

   1 
  „ 
  

  

  -35 
  eggs 
  laid 
  

  

  31st 
  October 
  

   2nd 
  November 
  

   4th 
  

   5th 
  

  

  10th 
  

  

  rest 
  spoilt 
  

  

  22nd 
  October. 
  

  

  24th 
  

  

  30th 
  

  

  2nd 
  November. 
  

  

  3rd 
  

  

  4th 
  

  

  5th 
  

  

  Tth 
  

  

  11-20 
  daj's; 
  earlier 
  

  

  dates 
  probably 
  not 
  

  

  y 
  correct 
  as 
  some 
  eo-^s 
  

  

  I 
  laid 
  previously 
  might 
  

  

  I 
  have 
  been 
  left 
  over. 
  

  

  