﻿123 
  

  

  These 
  experiments 
  prove 
  that 
  this 
  parasite 
  will 
  attack 
  and 
  

   breed 
  upon 
  three 
  different 
  kinds 
  of 
  wasps, 
  of 
  somewhat 
  differ- 
  

   ent 
  habits; 
  but 
  does 
  not 
  help 
  to 
  determine 
  what 
  it 
  was 
  upon 
  

   which 
  they 
  were 
  originally 
  discovered 
  by 
  Mr. 
  Giffard. 
  Un- 
  

   doubtedly 
  it 
  was 
  either 
  Odynerus 
  or 
  Pison. 
  From 
  its 
  prolific- 
  

   ness, 
  if 
  it 
  has 
  but 
  recently 
  become 
  introduced, 
  it 
  will 
  soon 
  be 
  

   numerous 
  enough 
  and 
  sufficiently 
  spread 
  so 
  that 
  observers 
  will 
  

   ere 
  long 
  be 
  finding 
  it, 
  and 
  mayhap 
  under 
  circumstances 
  in 
  

   which 
  its 
  host 
  can 
  readily 
  be 
  determined. 
  

  

  If 
  it 
  should 
  prey 
  chiefly 
  upon 
  Odynerus 
  species, 
  its 
  presence 
  

   will 
  be 
  detrimental, 
  as 
  the 
  OdyneH 
  store 
  up 
  caterpillars 
  for 
  

   food 
  for 
  their 
  young; 
  but 
  if 
  it 
  should 
  prey 
  chiefly 
  upon 
  Pison 
  

   and 
  Sceliphron 
  its 
  presence 
  would 
  be 
  beneficial 
  as 
  these 
  latter 
  

   wasps 
  both 
  store 
  up 
  spiders 
  for 
  their 
  young. 
  

  

  (ii) 
  Ageniaspis 
  sp. 
  (?) 
  

  

  This 
  small 
  Chalcid-fly 
  I 
  have 
  found 
  widely 
  distributed 
  in 
  

   the 
  Hawaiian 
  Islands 
  ; 
  having 
  found 
  it 
  breeding 
  on 
  Odynerus 
  

   larvae, 
  or 
  finding 
  the 
  remains 
  of 
  larvae 
  upon 
  which 
  they 
  have 
  

   fed, 
  in 
  nests 
  of 
  Odynerus 
  nigripennis 
  which 
  I 
  have 
  examined 
  

   in 
  Nuuanu 
  and 
  Makiki 
  Valley, 
  Oahu 
  ; 
  lao 
  Valley, 
  Maui, 
  and 
  in 
  

   Kau, 
  Hawaii. 
  In 
  each 
  of 
  the 
  places 
  mentioned 
  I 
  have 
  found 
  

   that 
  the 
  parasites 
  were 
  numerous. 
  In 
  one 
  instance, 
  I 
  bred 
  105 
  

   parasites 
  from 
  one 
  Odynerus 
  nigripennis 
  larva. 
  Where 
  I 
  have 
  

   found 
  parasitized 
  larvae 
  they 
  have 
  always 
  been 
  f 
  ull-grovsm 
  ; 
  

   and 
  when 
  the 
  parasites 
  become 
  fullgrown 
  and 
  pupate 
  they 
  have 
  

   eaten 
  the 
  entire 
  contents 
  of 
  their 
  host 
  and 
  completely 
  fill 
  its 
  

   skin. 
  They 
  can 
  be 
  seen 
  thru 
  the 
  partially 
  transparent 
  skin, 
  

   packed 
  so 
  close 
  that 
  the 
  skin 
  bulges 
  where 
  it 
  conforms 
  to 
  the 
  

   parasites 
  inside. 
  The 
  adult 
  parasites 
  escape 
  from 
  the 
  mud 
  

   cell 
  of 
  the 
  wasp 
  by 
  gnawing 
  a 
  tiny 
  hole 
  thru 
  the 
  plug 
  of 
  

   mud 
  which 
  sealed 
  it. 
  

  

  I 
  first 
  observed 
  this 
  parasite 
  in 
  December, 
  1905. 
  In 
  June, 
  

   1906, 
  I 
  made 
  several 
  attempts 
  to 
  breed 
  them 
  on 
  the 
  larvae 
  of 
  

   Sceliphron 
  caementarius 
  ; 
  but 
  was 
  entirely 
  unsuccessful. 
  The 
  

   other 
  parts 
  of 
  its 
  life 
  cycle 
  yet 
  remain 
  to 
  be 
  worked 
  out. 
  

  

  This 
  is 
  unquestionably 
  a 
  detrimental 
  parasite, 
  as 
  it, 
  so 
  far 
  

   as 
  I 
  know, 
  preys 
  only 
  on 
  Odynerus 
  species. 
  

  

  