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  XIX. 
  Notices 
  of 
  some 
  New 
  Species 
  of 
  Strepsij)t(rons 
  

   Insects 
  from 
  Albania, 
  with 
  further 
  Observations 
  on 
  the 
  

   Habits, 
  Transformations, 
  and 
  Sexual 
  Economy 
  of 
  these 
  

   Parasites. 
  By 
  S. 
  S. 
  Saunders, 
  Esq. 
  

  

  [Read 
  6th 
  December, 
  1852.] 
  

  

  Having 
  met 
  with 
  several 
  new 
  Strepsipterous 
  parasites, 
  obtained 
  

   from 
  different 
  species 
  of 
  Hijlceus 
  and 
  Odynerus, 
  and 
  having 
  had 
  

   frequent 
  opportunities 
  of 
  witnessing 
  their 
  metamorphoses 
  at 
  

   different 
  periods, 
  whereby 
  many 
  of 
  the 
  questions 
  which 
  had 
  arisen 
  

   as 
  to 
  the 
  mode 
  of 
  effecting 
  ingress 
  and 
  egress, 
  the 
  relative 
  posi- 
  

   tion 
  of 
  the 
  dorsal 
  and 
  ventral 
  surfaces 
  on 
  emerging, 
  the 
  expansion 
  

   of 
  the 
  vaginal 
  orifice 
  in 
  hexa 
  pod-bearing 
  females, 
  and 
  other 
  

   debateable 
  points, 
  (alluded 
  to 
  in 
  my 
  former 
  communication 
  pub- 
  

   lished 
  in 
  the 
  Transactions 
  of 
  the 
  Entomological 
  Society, 
  vol. 
  i. 
  

   N.S. 
  p. 
  43,) 
  may 
  receive 
  further 
  elucidation, 
  I 
  now 
  proceed 
  to 
  

   lay 
  before 
  the 
  Society 
  the 
  result 
  of 
  my 
  observations, 
  as 
  classed 
  

   under 
  the 
  following 
  heads. 
  

  

  1. 
  Saltatorial 
  Powers 
  of 
  the 
  Hexapod 
  Larvce. 
  

  

  These 
  hexapod 
  larvae, 
  when 
  their 
  segments 
  are 
  distended, 
  are 
  

   of 
  a 
  semi-transparent 
  piceous 
  hue, 
  with 
  minute 
  black 
  eyes, 
  the 
  

   thoracic 
  region 
  being 
  somewhat 
  inflated, 
  and 
  tlie 
  segments 
  thence 
  

   gradually 
  tapering 
  towards 
  the 
  anal 
  extremity 
  ; 
  each 
  distin- 
  

   guished, 
  where 
  superposed, 
  by 
  a 
  fine 
  transverse 
  line 
  of 
  deeper 
  

   brown, 
  the 
  three 
  anterior 
  segments 
  having 
  the 
  posterior 
  margin 
  

   more 
  broadly 
  banded, 
  the 
  anal 
  apex 
  inclining 
  to 
  castaneous, 
  with 
  

   the 
  base 
  of 
  the 
  setaB 
  piceous. 
  

  

  Those 
  o{ 
  Xenos 
  Rossii 
  are 
  enabled 
  to 
  leap 
  to 
  the 
  distance 
  of 
  full 
  

   half 
  an 
  inch, 
  but 
  by 
  what 
  means 
  this 
  movement 
  was 
  effected 
  I 
  

   could 
  not 
  determine. 
  They 
  did 
  not 
  appear 
  to 
  double 
  themselves 
  

   round 
  for 
  this 
  purpose, 
  as 
  in 
  the 
  case 
  of 
  the 
  cheese-maggot 
  

   (Tyrophaga 
  casei, 
  Curt,); 
  nor 
  did 
  I 
  observe 
  that 
  the 
  effect 
  was 
  

   produced, 
  as 
  may 
  be 
  conceived, 
  by 
  the 
  action 
  of 
  the 
  tail 
  and 
  caudal 
  

   setse, 
  as 
  practised 
  by 
  the 
  Podurellce, 
  Latr. 
  They 
  also 
  repeatedly 
  

   lept 
  upon 
  the 
  brush 
  wherewith 
  I 
  had 
  been 
  inciting 
  them 
  to 
  the 
  

   performance 
  of 
  this 
  feat, 
  after 
  having 
  removed 
  it, 
  as 
  I 
  thought, 
  

   above 
  their 
  reach. 
  I 
  afterwards 
  observed 
  the 
  same 
  process 
  

   repeated 
  in 
  the 
  hexapod 
  progeny 
  of 
  the 
  Strepsipterous 
  parasite 
  

   obtained 
  from 
  a 
  species 
  of 
  Ancistroccrus. 
  

  

  2. 
  Mode 
  of 
  Attack 
  by 
  the 
  Hexajood 
  Larvce. 
  

   Having 
  captured 
  about 
  the 
  middle 
  of 
  July 
  a 
  large 
  female 
  

  

  