﻿132 
  

  

  W. 
  A. 
  LAMBORN. 
  

  

  The 
  maximum 
  number 
  of 
  ova 
  obtained 
  from 
  a 
  single 
  parent 
  was 
  therefore 
  188, 
  

   and 
  the 
  average 
  number 
  from 
  each 
  parent, 
  based 
  on 
  the 
  data 
  from 
  24, 
  works 
  out 
  

   at 
  66. 
  The 
  f 
  oho 
  wing 
  is 
  a 
  description 
  of 
  the 
  ovum 
  (fig. 
  1, 
  a) 
  : 
  — 
  " 
  Length 
  0-56 
  mm., 
  

   breadth 
  0-20 
  mm. 
  ; 
  the 
  upper 
  surface 
  is 
  broad, 
  0-06 
  mm. 
  ; 
  the 
  floats 
  are 
  broad 
  

   and 
  cover 
  three-quarters 
  of 
  the 
  length 
  of 
  the 
  ovum. 
  Each 
  float 
  has 
  thirty-two 
  

   corrugations 
  and 
  these 
  nearly 
  touch 
  the 
  frill. 
  The 
  membrane 
  on 
  the 
  lower 
  surface 
  

   has 
  a 
  reticulated 
  pattern 
  " 
  (Stanton). 
  

  

  A. 
  hyrcanus 
  var. 
  paeditaeniatus. 
  

  

  The 
  months 
  of 
  oviposition 
  and 
  the 
  number 
  of 
  ova 
  secured 
  were 
  : 
  — 
  

  

  April 
  

   1920. 
  

  

  May. 
  

  

  June. 
  

  

  July. 
  

  

  Aug. 
  

  

  Sept. 
  

  

  Oct. 
  

  

  Nov. 
  

  

  Dec. 
  

  

  Jan. 
  

   1921. 
  

  

  Feb. 
  

  

  March. 
  

  

  ■ 
  — 
  

  

  90 
  

   10 
  

   13 
  

  

  — 
  

  

  — 
  

  

  

  

  — 
  

  

  — 
  

  

  55 
  

  

  — 
  

  

  

  

  147 
  

  

  22 
  

  

  40 
  

  

  The 
  average 
  number 
  of 
  ova 
  for 
  each 
  parent, 
  based 
  on 
  the 
  data 
  from 
  7, 
  works 
  out 
  

   at 
  53, 
  the 
  maximum 
  obtained 
  from 
  a 
  single 
  parent 
  being 
  147. 
  

  

  Anopheles 
  barbirostris. 
  

  

  The 
  months 
  of 
  oviposition 
  and 
  the 
  number 
  of 
  ova 
  secured 
  were 
  : 
  — 
  

  

  April 
  

   1920. 
  

  

  May. 
  

  

  June. 
  

  

  July. 
  

  

  Aug. 
  

  

  Sept. 
  

  

  Oct. 
  

  

  Nov. 
  

  

  Dec. 
  

  

  Jan. 
  

   1921. 
  

  

  Feb. 
  

  

  March. 
  

  

  — 
  

  

  10 
  

   16 
  

   10 
  

   24 
  

   88 
  

  

  85 
  

  

  86 
  

   125 
  

  

  — 
  

  

  

  

  

  

  31 
  

   20 
  

  

  50 
  

  

  293 
  

  

  56 
  

  

  56 
  

  

  159 
  

  

  

  

  121 
  

  

  98 
  

   115 
  

  

  72 
  

   173 
  

  

  The 
  maximum 
  number 
  of 
  ova 
  obtained 
  from 
  a 
  single 
  parent 
  was 
  293, 
  the 
  average, 
  

   based 
  on 
  the 
  data 
  from 
  20, 
  working 
  out 
  at 
  69. 
  

  

  Dr. 
  Stanton 
  states 
  that 
  the 
  ovum 
  does 
  not 
  differ 
  from 
  that 
  of 
  A. 
  hyrcanus. 
  

  

  Anopheles 
  maculatus. 
  

  

  The 
  months 
  of 
  oviposition 
  and 
  the 
  number 
  of 
  ova 
  secured 
  were 
  : 
  — 
  

  

  April 
  

   1920. 
  

  

  May. 
  

  

  June. 
  

  

  July. 
  

  

  Aug. 
  

  

  Sept. 
  

  

  Oct. 
  

  

  Nov. 
  

  

  Dec. 
  

  

  Jan. 
  

   1921. 
  

  

  Feb. 
  

  

  March. 
  

  

  ' 
  

  

  18 
  

  

  143 
  

  

  34 
  

   37 
  

   95 
  

  

  42 
  

   30 
  

  

  

  

  56 
  

   128 
  

   71 
  

   64 
  

   30 
  

   12 
  

   81 
  

   81 
  

   36 
  

  

  100 
  

  

  123 
  

  

  16 
  

  

  80 
  

   20 
  

   72 
  

   72 
  

   300 
  

   24 
  

   70 
  

   17 
  

   15 
  

   68 
  

  

  20 
  

  

  22 
  

  

  56 
  

  

  — 
  

  

  

  

  