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  the 
  fat-contents 
  of 
  which 
  the 
  parasite 
  has 
  sucked 
  out, 
  and 
  

   the 
  cells 
  are 
  then 
  pressed 
  together 
  around 
  it 
  (Fig. 
  5 
  s). 
  

   Around 
  the 
  sac 
  a 
  more 
  or 
  less 
  dense 
  and 
  coniplete 
  layer 
  of 
  

   leucocytes 
  is 
  found 
  (Fig. 
  1 
  1, 
  3 
  1, 
  6 
  1.) 
  and 
  leucocytes 
  are 
  

   also 
  gathered 
  around 
  and 
  between 
  the 
  hypoderm-cells 
  on 
  

   the 
  outside 
  of 
  the 
  funnel, 
  and 
  here 
  they 
  cause 
  the 
  coating 
  

   of 
  cells 
  to 
  increase 
  in 
  thickness. 
  

  

  The 
  parasite 
  feeds 
  exclusively 
  on 
  the 
  contents 
  of 
  the 
  

   fat-cells 
  until 
  it 
  gets 
  to 
  the 
  third 
  stage 
  ; 
  it 
  does 
  not 
  other- 
  

   wise 
  attack 
  the 
  organs 
  of 
  the 
  host, 
  but 
  during 
  growth 
  it 
  

   compresses 
  the 
  intestine 
  of 
  this 
  (Fig. 
  6 
  t). 
  When 
  the 
  parasite 
  

   is 
  nearly 
  fullgrown 
  it 
  ruptures 
  the 
  sac, 
  and 
  this, 
  together 
  

   with 
  all 
  the 
  organs 
  of 
  the 
  host 
  are 
  destroyed 
  and- 
  sucked 
  

   up 
  by 
  the 
  parasite 
  (Fig, 
  7). 
  At 
  the 
  same 
  time 
  the 
  host 
  

   dies, 
  and 
  the 
  parasite 
  draws 
  its 
  posterior 
  end 
  out 
  of 
  the 
  

   chitinous 
  funnel. 
  Next 
  the 
  boring 
  out 
  of 
  the 
  parasite 
  com- 
  

   mences; 
  this 
  aet 
  is 
  begun 
  by 
  the 
  parasite 
  pressing 
  the 
  end 
  

   of 
  its 
  body 
  against 
  a 
  spot 
  on 
  the 
  empty 
  skin 
  of 
  the 
  host: 
  this 
  

   spot 
  is 
  then 
  seen 
  to 
  get 
  moist, 
  and 
  by 
  and 
  by 
  the 
  chitin 
  

   disappears 
  and 
  thus 
  a 
  large, 
  open 
  hole 
  is 
  formed 
  through 
  

   which 
  the 
  parasite 
  emerges 
  backwards. 
  

  

  The 
  pupation 
  takes 
  place 
  in 
  the 
  cocoon 
  of 
  the 
  host, 
  

   and 
  after 
  the 
  course 
  of 
  a 
  month 
  the 
  iraago 
  escapes. 
  Only 
  

   one 
  parasite 
  in 
  each 
  host 
  larva 
  reaches 
  to 
  full 
  development. 
  

   Together 
  with 
  Ptxjchomyia, 
  Bactromyia 
  aurulenta 
  Meig, 
  also 
  

   occurred 
  in 
  the 
  Hyponomeuta-\2iT\æ 
  and 
  its 
  habits 
  were 
  quite 
  

   the 
  same 
  as 
  those 
  of 
  Plijchomyia. 
  

  

  Panzeria 
  rudis 
  Fall. 
  is 
  viviparous 
  and 
  deposits 
  its 
  larvæ 
  

   on 
  fullgrown 
  larvæ 
  of 
  Tæniocampa 
  stabilts 
  View. 
  The 
  larvæ 
  

   penetrate 
  through 
  the 
  integument 
  of 
  the 
  host 
  and 
  their 
  relation 
  

   to 
  the 
  latter 
  is 
  the 
  same 
  as 
  described 
  above 
  with 
  regard 
  to 
  

   Plychomyia; 
  only 
  the 
  chitinous 
  funnel 
  is 
  somewhat 
  longer, 
  

   and 
  the 
  parasite 
  feeds 
  nearly 
  exclusively 
  on 
  the 
  fat 
  of 
  the 
  

   host 
  and 
  spares 
  the 
  intestine 
  until 
  just 
  before 
  it 
  is 
  full- 
  

   grown. 
  The 
  larva 
  bores 
  its 
  way 
  out 
  through 
  the 
  larval 
  

   skin 
  of 
  the 
  host 
  and 
  pupates 
  in 
  the 
  ground. 
  The 
  pupæ 
  

   hibernate, 
  and 
  the 
  imagos 
  appear 
  in 
  June 
  and 
  July. 
  Only 
  

  

  