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  eggs, 
  averaging 
  over 
  twenty-eight 
  to 
  a 
  batch, 
  the 
  minimum 
  

   being 
  fifteen 
  and 
  the 
  maximum 
  fifty-two 
  in 
  the 
  eight 
  batches 
  

   referred 
  to. 
  My 
  earlier 
  observations 
  disclosed 
  the 
  fact 
  that 
  

   the 
  females 
  in 
  captivity 
  in 
  large 
  glass 
  breeding 
  jars 
  oviposited 
  

   to 
  a 
  much 
  greater 
  extent 
  than 
  when 
  placed 
  under 
  a 
  net 
  on 
  

   branches 
  of 
  the 
  tree 
  in 
  the 
  open, 
  and 
  these 
  later 
  investigations 
  

   further 
  show 
  that 
  in 
  the 
  smaller 
  enclosure 
  (a 
  jam 
  jar) 
  the 
  

   oviposition 
  was 
  still 
  more 
  rapid 
  and 
  that 
  the 
  batches 
  contained 
  

   a 
  much 
  larger 
  percentage 
  of 
  eggs 
  than 
  in 
  the 
  previous 
  experi- 
  

   ments. 
  

  

  The 
  sexes 
  of 
  the 
  beetles 
  comprising 
  the 
  whole 
  colony 
  under 
  

   observation 
  (including 
  those 
  bred 
  in 
  jars) 
  has 
  been 
  determined 
  

   as 
  thirteen 
  males 
  and 
  eight 
  females. 
  

  

  At 
  the 
  beginning 
  of 
  the 
  outdoor 
  experiments 
  referred 
  to, 
  

   koa 
  trees 
  were 
  searched 
  for 
  egg 
  batches 
  and 
  after 
  much 
  labor 
  

   one 
  leaf 
  was 
  found 
  apparently 
  similar 
  in 
  appearance 
  to 
  those 
  

   produced 
  by 
  the 
  colony. 
  This 
  leaf 
  was 
  taken 
  home 
  and 
  placed 
  

   in 
  a 
  glass 
  test 
  tube 
  and 
  ten 
  days 
  later 
  instead 
  of 
  the 
  larvae 
  I 
  

   found 
  that 
  Chalcid 
  parasites 
  were 
  emerging, 
  eleven 
  of 
  which 
  

   were 
  saved 
  and 
  three 
  or 
  four 
  others 
  accidentally 
  lost. 
  At 
  this 
  

   early 
  period 
  of 
  my 
  observations 
  it 
  was 
  not 
  certain, 
  however, 
  

   that 
  this 
  Chalcid 
  was 
  a 
  true 
  parasite 
  of 
  the 
  egg 
  of 
  Rhyncogo- 
  

   nus, 
  but 
  that 
  it 
  really 
  was 
  such 
  was 
  afterwards 
  proven. 
  One 
  

   of 
  the 
  e^g 
  batches 
  which 
  had 
  been 
  left 
  exposed 
  on 
  the 
  tree, 
  at 
  

   a 
  subsequent 
  visitation, 
  was 
  placed 
  in 
  a 
  glass 
  tube 
  and 
  some 
  

   of 
  the 
  eggs 
  began 
  hatching 
  on 
  the 
  sixth 
  day 
  after 
  their 
  removal 
  

   from 
  the 
  tree. 
  Noticing 
  but 
  few 
  larvae 
  emerging 
  from 
  this 
  

   particular 
  batch, 
  it 
  was 
  left 
  in 
  the 
  tube 
  for 
  a 
  longer 
  period 
  than 
  

   usual 
  and 
  nineteen 
  days 
  later 
  two 
  Chalcid 
  parasites 
  emerged 
  

   through 
  the 
  protecting 
  leaf 
  cover 
  of 
  the 
  egg 
  mass. 
  This 
  fact 
  

   and 
  later 
  investigations 
  of 
  the 
  remaining 
  eggs 
  proved 
  conclu- 
  

   sively 
  that 
  these 
  Chalcids 
  were 
  similar 
  to 
  the 
  previous 
  species 
  

   above 
  referred 
  to, 
  and 
  that 
  they 
  were 
  true 
  egg 
  parasites. 
  Both 
  

   these 
  Chalcids, 
  as 
  well 
  as 
  the 
  previous, 
  lot, 
  were 
  identified 
  by 
  

   Dr. 
  Perkins 
  as 
  an 
  Eupelmid 
  (Text 
  Fig. 
  on 
  p. 
  133). 
  I 
  understand 
  

   Dr. 
  Perkins 
  intends 
  to 
  supplement 
  my 
  observations 
  on 
  the 
  

   breeding 
  of 
  this 
  parasite 
  by 
  a 
  few 
  notes 
  of 
  his 
  own, 
  which 
  may 
  

   further 
  elucidate 
  its 
  habits. 
  

  

  EXPLANATION 
  OP 
  PL. 
  3. 
  

  

  Fig. 
  1. 
  Rhyncogonus 
  blackburni 
  9 
  ; 
  fig. 
  2. 
  $ 
  of 
  the 
  same; 
  fig. 
  3. 
  Koa 
  

   leaves 
  enclosing 
  egg 
  batch; 
  fig. 
  4. 
  Egg 
  batch 
  exposed. 
  

  

  