﻿378 
  

  

  raoCEKDlNGS 
  OF 
  THE 
  FOURTH 
  ENTOMOLOGICAL 
  MEETING 
  

  

  Mr. 
  Iyengar. 
  

  

  Mr. 
  Sharma. 
  

  

  Mr. 
  Ballard. 
  

  

  Mr. 
  Fletcher. 
  

  

  Mr. 
  Sen. 
  

  

  lu 
  conuection 
  with 
  this 
  very 
  interesting 
  paper 
  I 
  should 
  like 
  to 
  mention 
  

   some 
  of 
  my 
  observations 
  on 
  Anopheline 
  mosquitos. 
  When 
  mosquitos 
  

   are 
  being 
  dissected 
  for 
  sporozoits, 
  they 
  are 
  generally 
  not 
  chloroformed 
  

   but 
  are 
  slightly 
  disabled 
  by 
  a 
  few 
  shocks, 
  after 
  which 
  their 
  legs 
  ar« 
  

   pulled 
  out 
  and 
  the 
  wings 
  cut. 
  They 
  are 
  then 
  placed 
  in 
  normal 
  saline 
  

   solution 
  for 
  dissections, 
  and 
  then 
  it 
  is 
  very 
  frequently 
  found 
  that 
  the 
  

   mosquitos 
  drink 
  the 
  saline 
  solution 
  vigorously. 
  This 
  leads 
  us 
  to 
  pre- 
  

   sume 
  that 
  their 
  legs 
  have 
  something 
  to 
  do 
  with 
  their 
  taste 
  (or 
  perhaps 
  

   thirst 
  l) 
  and 
  that 
  as 
  a 
  result 
  of 
  the 
  removal 
  of 
  the 
  legs, 
  the 
  mosquitos 
  

   have 
  lost 
  their 
  sense 
  of 
  taste 
  and 
  perhaps 
  also 
  increased 
  their 
  thirst. 
  

  

  My 
  observations 
  were 
  different 
  to 
  those 
  of 
  Mr. 
  Iyengar, 
  as 
  regards 
  

   the 
  sucking 
  of 
  the 
  saline 
  solution 
  by 
  a 
  mosquito 
  after 
  the 
  removal 
  of 
  

   its 
  legs. 
  I 
  made 
  several 
  species 
  of 
  mosquitos 
  suck 
  saline 
  solution 
  after 
  

   the 
  amputation 
  of 
  half 
  the 
  proboscis. 
  

  

  In 
  1914 
  we 
  were 
  trying 
  some 
  baits 
  against 
  grassho]3pers 
  and 
  found 
  

   that 
  they 
  came 
  very 
  readily 
  to 
  those 
  flavoured 
  with 
  squashed 
  mango. 
  

   When 
  doing 
  this 
  work 
  again 
  I 
  did 
  not 
  use 
  mangoes 
  but 
  terpenoL 
  whicli 
  

   a 
  Chemist 
  gave 
  me 
  when 
  I 
  asked 
  him 
  for 
  something 
  that 
  smelt 
  like 
  a 
  

   mango, 
  and 
  I 
  found 
  baits 
  flavoured 
  with 
  this 
  equally 
  efficacious, 
  at 
  

   least 
  three 
  species 
  coming 
  readily. 
  

  

  Another 
  observation 
  I 
  have 
  made 
  refers 
  to 
  the 
  influence 
  of 
  bait 
  

   on 
  Pachi{(liplosis 
  oryzw. 
  This 
  species 
  comes 
  in 
  very 
  large 
  numbers 
  

   to 
  the 
  top 
  of 
  the 
  shade 
  over 
  a 
  200 
  c. 
  p. 
  Wellington 
  light 
  used 
  as 
  a 
  moth 
  

   trap, 
  but 
  very 
  few 
  are 
  found 
  in 
  the 
  tray 
  beneath 
  the 
  lamp. 
  Other 
  

   Cecidomyiadse 
  I 
  have 
  noticed 
  in 
  my 
  bungalow 
  attracted 
  to 
  hot 
  air 
  from 
  

   the 
  lamp 
  and 
  not 
  to 
  the 
  light 
  itself. 
  

  

  I 
  have 
  frequently 
  noticed 
  mosquitos 
  attracted 
  to 
  the 
  column 
  of 
  

   hot 
  air 
  about 
  the 
  radiator 
  of 
  a 
  motor 
  car. 
  There 
  is 
  no 
  question 
  of 
  light 
  

   in 
  this 
  instance. 
  

  

  With 
  regard 
  to 
  Mr. 
  Howlett's 
  point 
  about 
  the 
  attraction 
  of 
  female 
  

   Amsacta 
  albistriga, 
  in 
  one 
  year 
  they 
  came 
  in 
  very 
  large 
  numbers 
  to 
  

   the 
  scent 
  glands 
  of 
  living 
  males 
  in 
  muslin 
  bags, 
  but 
  in 
  other 
  years 
  they 
  

   did 
  not 
  do 
  so. 
  This 
  may 
  have 
  been 
  due 
  to 
  climatic 
  conditions. 
  We 
  

   only 
  tried 
  one 
  experiment 
  in 
  each 
  place. 
  

  

  I 
  was 
  deputed 
  to 
  work 
  at 
  the 
  sense 
  response 
  of 
  A. 
  albistriga 
  at 
  Palur 
  

   in 
  Madras, 
  and 
  dissected 
  out 
  the 
  male 
  genitalia 
  to 
  ascertain 
  the 
  nature 
  

   of 
  the 
  sexual 
  smell, 
  but 
  neither 
  Mr. 
  Hewlett 
  nor 
  myself 
  could 
  determine 
  

   it. 
  We 
  also 
  tried 
  a 
  large 
  number 
  of 
  scents, 
  especially 
  essential 
  oils, 
  

   but 
  without 
  result. 
  

  

  1 
  should 
  also 
  like 
  to 
  suggest 
  another 
  line 
  of 
  work. 
  The 
  investigation 
  

   of 
  the 
  optical 
  properties 
  of 
  the 
  solar 
  spectrum 
  in 
  controlling 
  the 
  acti- 
  

  

  