﻿134 
  Mr. 
  S. 
  S. 
  Saunders's 
  Notices 
  of 
  some 
  

  

  convex 
  upper 
  surface 
  in 
  the 
  feviales 
  corresponds 
  with 
  the 
  dorsal, 
  

   and 
  the 
  concave 
  under 
  surface 
  with 
  the 
  ventral 
  region. 
  

  

  9. 
  Exit 
  of 
  the 
  Imago 
  Male. 
  

   After 
  the 
  first 
  burst, 
  produced 
  apparently 
  by 
  the 
  parasite 
  press- 
  

   ing 
  forcibly 
  against 
  the 
  operculum, 
  the 
  head 
  and 
  shoulders 
  being 
  

   instantaneously 
  protruded 
  on 
  this 
  falling 
  off, 
  a 
  slight 
  effort 
  suffices 
  

   to 
  liberate 
  the 
  pseudelytra 
  and 
  first 
  pair 
  of 
  legs 
  ; 
  when 
  all 
  these 
  

   organs 
  idly 
  beating 
  the 
  air 
  and 
  agitating 
  incessantly, 
  much 
  exer- 
  

   tion 
  is 
  made 
  to 
  effect 
  a 
  passage 
  for 
  the 
  second 
  pair 
  of 
  legs, 
  where 
  

   the 
  principal 
  detention 
  occurs 
  ; 
  after 
  which 
  a 
  few 
  jerks 
  up 
  and 
  

   down 
  speedily 
  serve 
  to 
  release 
  the 
  metathorax 
  and 
  abdomen 
  ; 
  the 
  

   imago 
  forthwith 
  winging 
  its 
  flight 
  towards 
  the 
  light, 
  where 
  it 
  con- 
  

   tinues 
  flitting 
  up 
  and 
  down 
  until 
  its 
  fragile 
  frame 
  becomes 
  ex- 
  

   hausted, 
  and 
  it 
  sinks 
  powerless 
  below, 
  still 
  vibrating 
  its 
  wings 
  but 
  

   unable 
  to 
  rise 
  again. 
  

  

  I 
  have 
  never 
  succeeded 
  in 
  retaining 
  them 
  alive 
  beyond 
  the 
  day 
  

   of 
  exit, 
  and 
  indeed 
  they 
  have 
  not 
  often 
  survived 
  more 
  than 
  a 
  few 
  

   hours, 
  generally 
  between 
  two 
  and 
  three. 
  Jurine, 
  who 
  was 
  equally 
  

   unsuccessful 
  in 
  this 
  respect, 
  suggested 
  that 
  their 
  premature 
  death 
  

   might 
  be 
  occasioned 
  by 
  the 
  continual 
  blows 
  received 
  when 
  coming 
  

   into 
  contact 
  with 
  the 
  glass 
  ; 
  but 
  the 
  same 
  effects 
  have 
  been 
  pro- 
  

   duced 
  when 
  I 
  have 
  allowed 
  them 
  to 
  emerge 
  within 
  a 
  pill 
  box 
  

   covered 
  with 
  fine 
  muslin 
  at 
  top 
  and 
  bottom, 
  and 
  freely 
  exposed 
  

   to 
  a 
  current 
  of 
  air, 
  with 
  moistened 
  cotton 
  placed 
  in 
  front. 
  Yet 
  

   during 
  their 
  brief 
  term 
  of 
  existence 
  they 
  are 
  not 
  so 
  weak 
  and 
  

   helpless 
  as 
  may 
  be 
  supposed, 
  for 
  on 
  one 
  occasion 
  when 
  three 
  male 
  

   Hylecthri 
  were 
  obtained 
  alive 
  from 
  a 
  dead 
  Hylceus, 
  the 
  first 
  which 
  

   exhibited 
  itself 
  commenced 
  dragging 
  the 
  bee 
  about 
  behind 
  him, 
  

   together 
  with 
  his 
  unemancipated 
  comrades, 
  until 
  he 
  succeeded 
  

   eventually 
  in 
  effecting 
  his 
  escape 
  from 
  the 
  pupa-case. 
  

  

  Sometimes 
  the 
  parasite 
  has 
  been 
  observed 
  to 
  twist 
  round 
  upon 
  

   the 
  dorsal 
  segments 
  of 
  the 
  bee 
  while 
  making 
  its 
  exit, 
  and 
  then 
  

   resume 
  its 
  original 
  position, 
  the 
  whole 
  operation 
  occupying 
  usually 
  

   but 
  a 
  few 
  minutes, 
  and 
  occasionally 
  less 
  than 
  one. 
  The 
  ordinary 
  

   period 
  for 
  quitting 
  the 
  pupa-case, 
  in 
  the 
  Hylecthri, 
  would 
  appear 
  

   to 
  be 
  about 
  the 
  eighth 
  day 
  after 
  their 
  first 
  protrusion 
  ; 
  nor 
  upon 
  

   careful 
  investigation 
  have 
  I 
  found 
  any 
  complete 
  their 
  final 
  meta- 
  

   morphosis 
  sooner 
  than 
  this, 
  although 
  sometimes 
  protracted 
  a 
  day 
  

   or 
  two 
  later. 
  The 
  darkening 
  of 
  the 
  operculum 
  serves 
  to 
  indicate 
  

   the 
  immediate 
  presence 
  of 
  the 
  imago 
  in 
  contiguity 
  to 
  the 
  fenes- 
  

   trated 
  lattices, 
  watching 
  for 
  a 
  fitting 
  opportunity 
  to 
  effect 
  its 
  exit; 
  

   when 
  exposure 
  to 
  a 
  full 
  light, 
  without 
  sun, 
  is 
  sufficient 
  to 
  induce 
  

  

  