﻿PROCEEDINGS 
  OF 
  THE 
  FOURTH 
  ENT01\rOLOGICAL 
  MEETING 
  131 
  

  

  14th- 
  17th 
  November 
  — 
  12 
  eggs 
  — 
  19 
  beetles 
  alive 
  : 
  all 
  spoilt. 
  

   17th-20th 
  November 
  — 
  8 
  eggs 
  — 
  12 
  beetles 
  alive 
  : 
  

  

  1 
  hatched 
  ..... 
  12th 
  December. 
  

  

  1 
  egg 
  remained 
  in 
  apparently 
  unspoilt 
  condition 
  till 
  30th 
  December 
  1919 
  

  

  .20th-23rd 
  November 
  — 
  7 
  eggs 
  — 
  9 
  beetles 
  alive 
  : 
  

  

  1 
  hatched 
  ..... 
  17th 
  December. 
  

   23rd-26th 
  November 
  — 
  1 
  egg 
  — 
  4 
  beetles 
  alive 
  : 
  

  

  It 
  remained 
  in 
  apparently 
  unspoilt 
  condition 
  till 
  4th 
  January 
  

  

  1st 
  December 
  — 
  No 
  egg 
  — 
  4 
  beetles 
  alive. 
  

   lOtli 
  December 
  — 
  No 
  egg 
  — 
  1 
  beetle 
  alive. 
  

   14th 
  December 
  — 
  No 
  egg 
  — 
  all 
  the 
  beetles 
  dead. 
  

  

  Twenty-seven 
  grubs, 
  whicli 
  hatched 
  between 
  22nd 
  October 
  and 
  

   5th 
  November 
  1919, 
  were 
  placed 
  in 
  one 
  bell-jar 
  with 
  growing 
  maize. 
  

   On 
  15th 
  March 
  1920, 
  only 
  one 
  half-grown 
  was 
  in 
  this 
  jar. 
  

  

  Thirtyone 
  grubs, 
  hatched 
  between 
  7th 
  November 
  and 
  12th 
  December, 
  

   were 
  placed 
  in 
  another 
  jar. 
  On 
  15th 
  March 
  1920 
  eight 
  grubs 
  were 
  

   living 
  in 
  this 
  jar. 
  One 
  was 
  partly 
  eaten 
  apparently 
  by 
  the 
  other 
  grubs. 
  

  

  31st 
  March 
  1920—2 
  pupated. 
  

  

  1 
  emerged 
  on 
  10th 
  April 
  

   1 
  „ 
  „ 
  nth 
  „ 
  

  

  One 
  more 
  found 
  to 
  have 
  pupated 
  on 
  11th 
  April 
  1920. 
  It 
  emerged 
  on 
  

   21st 
  April. 
  

  

  The 
  grubs 
  hardly 
  did 
  any 
  damage 
  to 
  sugarcane 
  and 
  fed 
  mostly 
  on 
  

   the 
  manure. 
  

  

  The 
  eggs 
  are 
  white 
  and 
  have 
  a 
  smooth 
  membranous 
  shell. 
  They 
  

   vary 
  in 
  size. 
  The 
  smallest 
  ones 
  are 
  oval 
  or 
  almost 
  oval 
  in 
  shape 
  measur- 
  

   ing 
  about 
  1-75 
  mm. 
  in 
  length 
  and 
  about 
  1-5 
  mm. 
  the 
  other 
  way. 
  The 
  

   larger 
  ones 
  are 
  almost 
  round 
  and 
  the 
  largest 
  of 
  them 
  is 
  about 
  2-5 
  mm. 
  

   in 
  diameter. 
  The 
  eggs 
  increase 
  in 
  size 
  with 
  age. 
  

  

  20th 
  October 
  1919 
  — 
  3 
  eggs, 
  1| 
  mm....lj 
  mm., 
  were 
  kept 
  separately. 
  

  

  27th 
  October 
  1919 
  — 
  One 
  was 
  spoilt 
  — 
  2 
  almost 
  round 
  about 
  2 
  mm. 
  in 
  diameter. 
  

  

  All 
  eggs 
  do 
  not 
  attain 
  the 
  same 
  size. 
  They 
  vary 
  from 
  about 
  2 
  to 
  

   2 
  5 
  mm. 
  in 
  diameter. 
  The 
  newly-hatched 
  grubs 
  also 
  vary 
  in 
  size, 
  

   varying 
  in 
  length 
  from 
  about 
  3-5 
  to 
  5 
  mm. 
  The 
  head 
  is 
  the 
  largest 
  

   segment. 
  The 
  body 
  tapers 
  gradually 
  from 
  the 
  thoracic 
  region 
  hind- 
  

   wards. 
  The 
  young 
  grubs 
  are 
  like 
  ordinary 
  cockchafer 
  grubs 
  with 
  three 
  

   pairs 
  of 
  thoracic 
  legs. 
  

  

  The 
  full-fed 
  grub 
  measures, 
  when 
  it 
  walks 
  on 
  a 
  flat 
  surface, 
  about 
  

   28 
  mm. 
  in 
  length. 
  The 
  head 
  is 
  brown 
  yellow 
  and 
  its 
  surface 
  appears 
  

   minutely 
  pitted 
  under 
  lens 
  ; 
  on 
  the 
  vertex 
  there 
  is 
  a 
  longitudinal 
  slit- 
  

   like 
  marking. 
  The 
  dorsal 
  regions 
  of 
  the 
  subsegments 
  of 
  the 
  first 
  six 
  

   abdominal 
  segments 
  have 
  minute 
  bristle-like 
  brown 
  hairs 
  though 
  not 
  

  

  