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  here 
  for 
  want 
  of 
  aphis 
  on 
  citrus 
  plants 
  in 
  Honolulu. 
  Mr. 
  

   Kotinsky 
  had, 
  however, 
  located 
  a 
  citrus 
  tree 
  at 
  Wahiawa, 
  well 
  

   stocked 
  with 
  aphis 
  and 
  there 
  released 
  a 
  colony 
  of 
  the 
  parasites. 
  

   Mr. 
  Kotinsky 
  reported 
  breeding 
  Eretmocerus 
  convi 
  Hald. 
  

   from 
  pupae 
  of 
  Aleyrodes 
  hibisci 
  collected 
  in 
  Honolulu. 
  The 
  

   parasite 
  was 
  determined 
  by 
  Dr. 
  Perkins. 
  

  

  PAPEKS 
  READ. 
  

  

  Breeding' 
  Experiments 
  and 
  some 
  Observations 
  on 
  the 
  Life 
  

   History 
  of 
  Rhyncog-onus 
  blackburni 
  Sharp. 
  

  

  BY 
  W. 
  M. 
  GIFFARD. 
  

  

  The 
  absence 
  of 
  any 
  information 
  relative 
  to 
  the 
  life 
  history 
  

   of 
  this 
  interesting 
  Hawaiian 
  0^ior/iynchzne{Fl. 
  3, 
  Figs. 
  1 
  & 
  2 
  ) 
  led 
  me 
  

   to 
  undertake 
  a 
  series 
  of 
  general 
  observations 
  as 
  to 
  its 
  methods 
  

   of 
  reproduction. 
  These 
  observations 
  are 
  at 
  present 
  limited 
  to 
  

   the 
  oviposition 
  and 
  the 
  earlier 
  stages 
  of 
  the 
  larva, 
  but 
  owing 
  

   to 
  the 
  fact 
  that 
  this 
  insect 
  is 
  restricted 
  to 
  the 
  native 
  forest 
  

   belt 
  and 
  that 
  these 
  observations 
  have 
  of 
  necessity 
  been 
  con- 
  

   ducted 
  in 
  the 
  forest 
  itself, 
  it 
  has 
  been 
  impracticable 
  up 
  to 
  

   the 
  present 
  time 
  to 
  make 
  a 
  close 
  study 
  of 
  many 
  points 
  in 
  its 
  

   life 
  history 
  which 
  would 
  probably 
  be 
  of 
  great 
  interest. 
  The 
  

   experiments 
  undertaken 
  were 
  first 
  conducted 
  within 
  a 
  closed 
  

   vessel 
  at 
  an 
  elevation 
  of 
  1300 
  feet. 
  In 
  this 
  instance 
  eighteen 
  

   beetles 
  in 
  all 
  were 
  taken 
  by 
  me 
  from 
  a 
  tree 
  (Acacm 
  Jcoa) 
  in 
  the 
  

   native 
  forest 
  adjacent 
  to 
  my 
  mountain 
  home 
  on 
  Tantalus, 
  six 
  

   of 
  which 
  were 
  females, 
  and 
  twelve 
  males. 
  Two 
  of 
  the 
  females 
  

   disappeared 
  from 
  the 
  jar 
  within 
  the 
  first 
  week 
  of 
  their 
  cap- 
  

   tivity, 
  leaving 
  only 
  four 
  of 
  that 
  sex 
  to 
  breed 
  with. 
  These 
  four 
  

   females 
  were 
  confined 
  with 
  a 
  number 
  of 
  the 
  males 
  for 
  a 
  period 
  

   of 
  sixty 
  days, 
  fresh 
  koa 
  twigs 
  with 
  leaves 
  attached 
  having 
  been 
  

   supplied 
  to 
  them 
  every 
  sixth 
  day. 
  The 
  first 
  batches 
  of 
  eegs, 
  

   three 
  in 
  number, 
  were 
  discovered 
  twenty 
  days 
  after 
  the 
  beetles 
  

   had 
  been 
  confined. 
  During 
  the 
  next 
  forty 
  days, 
  forty-two 
  

   batches 
  of 
  eggs 
  were 
  taken, 
  making 
  forty-five 
  batches 
  in 
  all 
  

   during 
  the 
  period 
  of 
  captivity. 
  Of 
  these 
  the 
  largest 
  proportion 
  

   was 
  placed 
  in 
  another 
  breeding 
  jar 
  for 
  further 
  observation. 
  It 
  

   will 
  therefore 
  be 
  seen 
  that 
  during 
  the 
  period 
  of 
  sixty 
  days 
  

   above 
  referred 
  to, 
  each 
  female 
  produced 
  an 
  average 
  of 
  say 
  

  

  