﻿New 
  Species 
  of 
  Strepsipterous 
  Insects. 
  141 
  

  

  vering 
  his 
  expanded 
  and 
  uplifted 
  wings, 
  while 
  recurving 
  the 
  

   abdomen 
  considerably 
  in 
  the 
  direction 
  of 
  his 
  secluded 
  partner, 
  

   and 
  returning 
  on 
  several 
  occasions 
  to 
  repeat 
  the 
  same 
  process, 
  

   although 
  the 
  pairing 
  may 
  not 
  have 
  been 
  fully 
  consummated 
  on 
  

   any 
  of 
  these 
  occasions, 
  the 
  Hijlceus 
  being, 
  as 
  in 
  the 
  former 
  in- 
  

   stance, 
  in 
  a 
  disabled 
  state, 
  and 
  dying 
  in 
  the 
  course 
  of 
  the 
  day. 
  

  

  Desci 
  

  

  IPTIONS 
  OF 
  NEW 
  J5PEC1ES. 
  

  

  1. 
  Xenos 
  Heydenii. 
  

  

  Long. 
  Corp. 
  ~^-^ 
  unc, 
  mas. 
  

  

  The 
  male 
  is 
  much 
  smaller 
  and 
  more 
  elongate 
  than 
  that 
  of 
  the 
  

   Xenos 
  Rossii, 
  having 
  also 
  the 
  antennas 
  less 
  lanceolate. 
  The 
  female 
  

   has 
  the 
  cephalothorax 
  more 
  acuminate 
  and 
  of 
  a 
  dark 
  piceous 
  

   hue, 
  with 
  a 
  strongly-marked 
  longitudinal 
  impression 
  near 
  the 
  

   lateral 
  margin 
  on 
  each 
  side 
  of 
  the 
  prothoracic 
  disc. 
  

  

  Inhabits 
  the 
  bodies 
  oi 
  Ancistrocerus 
  dejlendus. 
  

  

  Of 
  the 
  male 
  I 
  only 
  obtained 
  a 
  single 
  specimen, 
  extracted 
  in 
  a 
  

   bad 
  condition 
  after 
  death, 
  the 
  Anclstrocerus 
  bearing 
  the 
  pupa 
  of 
  

   which, 
  having 
  been 
  taken 
  on 
  the 
  5th 
  July, 
  died 
  on 
  the 
  8th, 
  when 
  

   on 
  partially 
  removing 
  the 
  operculum 
  the 
  nymph 
  of 
  the 
  parasite 
  

   was 
  found 
  still 
  pale 
  ; 
  but 
  it 
  changed 
  from 
  white 
  to 
  black 
  on 
  the 
  

   9th, 
  and 
  was 
  extracted 
  dead 
  in 
  the 
  imago 
  state 
  on 
  the 
  13th. 
  The 
  

   operculum 
  also, 
  on 
  internal 
  inspection, 
  differs 
  from 
  that 
  of 
  Xenos 
  

   Rossii 
  in 
  its 
  markings 
  and 
  transparent 
  portions. 
  

  

  Of 
  the 
  female 
  I 
  obtained 
  several 
  specimens, 
  captured 
  from 
  the 
  

   29th 
  Jime 
  to 
  the 
  lOlh 
  August, 
  and 
  among 
  these 
  some 
  producing 
  

   hexapods 
  on 
  the 
  13th 
  July 
  and 
  9th 
  August. 
  The 
  Ancistroceri 
  

   were 
  chiefly 
  met 
  with 
  on 
  the 
  flowers 
  of 
  the 
  wild 
  peppermint 
  in 
  

   localities 
  sheltered 
  from 
  the 
  wind. 
  

  

  I 
  have 
  been 
  induced 
  to 
  attach 
  to 
  this 
  species 
  the 
  name 
  of 
  the 
  

   Senator 
  Van 
  Heyden, 
  who 
  is 
  recorded 
  in 
  our 
  Transactions* 
  to 
  

   have 
  met 
  with 
  a 
  new 
  Xenos 
  in 
  a 
  small 
  Odynerus, 
  which, 
  however, 
  

   he 
  conceived 
  to 
  have 
  been 
  the 
  0. 
  auctus. 
  

  

  Found 
  in 
  the 
  neighbourhood 
  of 
  Prevesa 
  and 
  the 
  Ambracian 
  

   Gulf. 
  

  

  The 
  Ancistrocerus 
  from 
  which 
  this 
  was 
  was 
  obtained, 
  apparently 
  

   an 
  undescribed 
  species, 
  has 
  the 
  clypeus 
  black, 
  with 
  a 
  well-defined 
  

   broad 
  yellow 
  band 
  across 
  the 
  base 
  and 
  embracing 
  the 
  angles 
  on 
  

   each 
  side, 
  a 
  truncate 
  frontal 
  mark, 
  a 
  spot 
  in 
  front 
  of 
  each 
  eye, 
  and 
  

   a 
  streak 
  behind 
  their 
  posterior 
  margin, 
  yellow. 
  Antennce 
  black, 
  

   the 
  basal 
  joint 
  yellow 
  beneath. 
  Mandibles 
  straight, 
  somewhat 
  

   rufescent, 
  yellow 
  at 
  the 
  base, 
  with 
  the 
  inner 
  dentate 
  margin 
  

  

  • 
  Trans. 
  Ent. 
  Soc. 
  Vol. 
  I. 
  p. 
  Ixxiv. 
  

  

  