﻿New 
  Species 
  of 
  Strepsipterous 
  Insects. 
  129 
  

  

  I 
  have 
  sometimes 
  seen 
  three 
  parasites 
  thus 
  engaged 
  simul- 
  

   taneously 
  within 
  the 
  same 
  HTjlcjeus 
  ; 
  and 
  should 
  the 
  attempt 
  not 
  

   prove 
  successful, 
  the 
  locality 
  is 
  changed 
  for 
  the 
  segmental 
  division 
  

   next 
  in 
  succession 
  ; 
  or, 
  if 
  foiled 
  again 
  here, 
  the 
  parasite 
  some- 
  

   times 
  remounts 
  to 
  the 
  preceding 
  one. 
  These 
  efforts 
  have 
  been 
  

   continued 
  for 
  upwards 
  of 
  an 
  hour 
  after 
  a 
  newly 
  developed 
  imago 
  

   Hyla;us, 
  within 
  which 
  the 
  eye 
  shades 
  were 
  discerned, 
  had 
  been 
  

   immersed 
  in 
  spirits, 
  until 
  at 
  length 
  the 
  parasite 
  appeared 
  to 
  have 
  

   attained 
  the 
  extreme 
  verge 
  of 
  the 
  segmental 
  threshold 
  ere 
  its 
  

   career 
  was 
  finally 
  arrested. 
  

  

  The 
  same 
  absorbent 
  influences 
  upon 
  the 
  Hylceus 
  not 
  being 
  pro- 
  

   duced 
  in 
  the 
  case 
  of 
  female 
  parasites, 
  nor 
  any 
  indication 
  of 
  their 
  

   presence 
  being 
  supplied, 
  as 
  might 
  be 
  expected, 
  by 
  a 
  distension 
  of 
  

   the 
  abdominal 
  region, 
  no 
  opportunity 
  has 
  been 
  afforded, 
  as 
  in 
  the 
  

   case 
  of 
  the 
  males^ 
  of 
  observing 
  their 
  proceedings 
  at 
  the 
  period 
  of 
  

   exit. 
  

  

  6. 
  Occasional 
  Exit 
  from 
  ventral 
  Surface. 
  

  

  Instances 
  have 
  occurred 
  when 
  male 
  parasites 
  have 
  effected 
  their 
  

   exit 
  between 
  the 
  ventral 
  segments 
  of 
  the 
  Hylcei. 
  A 
  similar 
  oc- 
  

   currence 
  in 
  the 
  Xenos 
  has 
  been 
  alluded 
  to 
  by 
  Jurine, 
  who 
  states 
  

   that 
  he 
  found 
  their 
  " 
  tumeurs 
  placees 
  ordinairement 
  entre 
  les 
  3^ 
  

   4* 
  et 
  5* 
  segmens 
  abdominaux, 
  plus 
  frequemment 
  en 
  dessus 
  qu'en 
  

   dessous." 
  

  

  This 
  anomaly 
  having 
  been 
  witnessed 
  in 
  the 
  Hylcei 
  in 
  those 
  cases 
  

   only 
  where 
  several 
  parasites 
  had 
  been 
  nurtured 
  by 
  the 
  same 
  indi- 
  

   vidual, 
  may 
  be 
  ascribable 
  to 
  impediments 
  derived 
  from 
  want 
  of 
  

   space, 
  although 
  in 
  some 
  instances 
  three 
  fully 
  developed 
  pupa- 
  

   cases 
  have 
  been 
  protruded 
  between 
  the 
  dorsal 
  folds, 
  and 
  the 
  

   imago 
  duly 
  produced 
  from 
  each. 
  

  

  Whenever 
  any 
  of 
  the 
  parasites 
  have 
  presented 
  themselves 
  on 
  

   the 
  ventral 
  surface 
  of 
  the 
  abdomen 
  of 
  the 
  bee, 
  the 
  pupa-cases 
  

   have 
  been 
  reversed, 
  their 
  relative 
  position 
  as 
  regards 
  the 
  body 
  of 
  

   the 
  bee 
  being 
  the 
  same 
  as 
  usual, 
  the 
  rostrum 
  pointing 
  towards 
  the 
  

   abdominal 
  segments. 
  

  

  7. 
  Subsequent 
  Metamorphoses. 
  

  

  a. 
  Of 
  the 
  Male. 
  

  

  The 
  head 
  of 
  the 
  male 
  Hylecthrus 
  at 
  the 
  moment 
  of 
  protrusion 
  

  

  is 
  white, 
  the 
  eye-shades 
  of 
  a 
  castaneous 
  hue, 
  and 
  the 
  rostrum 
  

  

  presenting 
  a 
  semilunar 
  piceous 
  margin, 
  forming 
  an 
  indurated 
  

  

  apex, 
  with 
  a 
  curvilineal 
  lateral 
  prolongation 
  at 
  the 
  base 
  towards 
  

  

  VOL. 
  II. 
  N. 
  S. 
  PART 
  V. 
  —JUNE, 
  1853. 
  K 
  

  

  