﻿New 
  Species 
  of 
  Strej)sipteroiis 
  Insects. 
  131 
  

  

  tubercle, 
  corresponding 
  in 
  position 
  with 
  those 
  seen 
  on 
  either 
  side 
  

   of 
  the 
  rostrum 
  in 
  the 
  operculum 
  of 
  the 
  male 
  ; 
  and 
  in 
  approxima- 
  

   tion 
  to 
  these, 
  curving 
  round 
  from 
  the 
  base, 
  are 
  two 
  deflexed 
  shining 
  

   corneous 
  appendages, 
  which 
  may 
  be 
  considered 
  equivalent 
  to 
  the 
  

   iTiandibular 
  organs 
  of 
  the 
  male 
  ; 
  the 
  inferior 
  lip 
  curling 
  over 
  

   beneath. 
  

  

  In 
  the 
  course 
  of 
  a 
  few 
  days 
  the 
  apical 
  region 
  of 
  the 
  squamous 
  

   disc 
  becomes 
  so 
  much 
  vaulted 
  and 
  foreshortened, 
  that 
  by 
  a 
  com- 
  

   parison 
  of 
  two 
  female 
  parasites 
  bred 
  from 
  the 
  same 
  bee, 
  it 
  would 
  

   appear 
  as 
  if 
  in 
  one 
  of 
  these 
  an 
  anterior 
  lobe 
  had 
  been 
  thrown 
  

   off 
  as 
  an 
  operculum, 
  on 
  a 
  line 
  corresponding 
  above 
  with 
  a 
  well- 
  

   defined 
  sutural 
  curve 
  on 
  the 
  concave 
  surface 
  below, 
  marking 
  

   the 
  extreme 
  limit 
  of 
  the 
  true 
  larva 
  head, 
  having, 
  however, 
  the 
  

   vaulted 
  prothoracic 
  segment 
  still 
  partially 
  carried 
  forward 
  hood- 
  

   like 
  above. 
  

  

  On 
  a 
  front 
  inspection 
  of 
  this 
  semi-lunar 
  arched 
  aperture 
  in 
  

   prolific 
  females, 
  a 
  delicate 
  membranous 
  pellicle 
  may 
  be 
  discerned 
  

   within, 
  (sometimes 
  attached 
  to 
  the 
  thoracic 
  hood, 
  and 
  at 
  other 
  

   times 
  separated,) 
  presenting 
  a 
  well 
  defined 
  arcuate 
  anterior 
  mar- 
  

   gin, 
  porrected 
  beneath 
  the 
  convex 
  shield, 
  and 
  corresponding 
  with 
  

   the 
  prothoracic 
  arch, 
  whence 
  it 
  may 
  be 
  inferred 
  that 
  this 
  dis- 
  

   junction 
  is 
  produced 
  in 
  like 
  manner 
  by 
  a 
  natural 
  separation 
  of 
  

   parts 
  ; 
  the 
  base 
  of 
  the 
  orifice 
  being 
  connected 
  by 
  piceous 
  lateral 
  

   nervures, 
  swerving 
  upwards 
  from 
  the 
  lower 
  region 
  of 
  the 
  oeso- 
  

   phagus 
  towards 
  the 
  larva 
  mouth 
  in 
  front. 
  

  

  On 
  removing 
  the 
  superincumbent 
  convex 
  shield, 
  the 
  quadri- 
  

   lateral 
  thoracic 
  duct, 
  already 
  perceptible 
  through 
  the 
  disc, 
  is 
  

   found 
  covered 
  throughout 
  with 
  this 
  flatly 
  distended 
  pellicle, 
  

   which, 
  for 
  reasons 
  afterwards 
  explained, 
  must 
  be 
  considered 
  to 
  

   extend 
  over 
  the 
  whole 
  of 
  the 
  thoracic 
  region. 
  This 
  duct, 
  hence- 
  

   forth 
  serving 
  as 
  the 
  vaginal 
  channel, 
  continues 
  gradually 
  widen- 
  

   ing 
  until 
  it 
  reaches 
  the 
  soft 
  abdominal 
  segments 
  ; 
  and 
  eventually 
  

   is 
  used 
  by 
  the 
  hexapod 
  progeny 
  as 
  a 
  kind 
  of 
  vestibule 
  or 
  mar- 
  

   supium 
  for 
  egress 
  and 
  ingress, 
  according 
  to 
  circumstances, 
  as 
  

   noticed 
  by 
  Dr. 
  Siebold, 
  and 
  witnessed 
  also 
  by 
  myself. 
  It 
  has 
  

   never 
  occurred 
  to 
  me 
  to 
  find 
  ova 
  or 
  immature 
  larvae 
  therein, 
  as 
  

   in 
  the 
  instance 
  alluded 
  to 
  by 
  Mr. 
  Newport;* 
  in 
  which 
  case, 
  

   however, 
  the 
  abdomen 
  of 
  the 
  parasite 
  having 
  been 
  previously 
  

   " 
  ruptured," 
  the 
  ova 
  may 
  possibly 
  have 
  been 
  displaced. 
  

  

  At 
  the 
  origin 
  of 
  the 
  mesothorax, 
  where 
  the 
  disc 
  of 
  the 
  shield 
  

   is 
  much 
  inflated, 
  a 
  minute 
  stigma 
  maybe 
  traced 
  on 
  the 
  lateral 
  

  

  * 
  Linn. 
  Trans, 
  vol. 
  xx. 
  p. 
  337. 
  

   K 
  2 
  

  

  