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  . 
  II. 
  A 
  MonograjyJi 
  of 
  British 
  Braconidse. 
  Part 
  IV. 
  

   By 
  the 
  Eev. 
  Thomas 
  A. 
  Marshall, 
  M.A., 
  F.E.S. 
  

  

  [Eead 
  November 
  5th, 
  1890.] 
  

  

  PLATE 
  II. 
  

  

  XXIII. 
  OPIIDES. 
  

  

  Clypeus 
  either 
  fitting 
  closely 
  to 
  the 
  mandibles, 
  or 
  raised 
  in 
  front 
  

   so 
  as 
  to 
  leave 
  a 
  naiTOw 
  transverse 
  aperture. 
  Occiput 
  concave, 
  not 
  

   margined 
  (except 
  in 
  Ademon). 
  Maxillary 
  palpi 
  6-, 
  labial 
  3 
  — 
  4- 
  

   jointed. 
  Mesothoracic 
  sutures 
  more 
  or 
  less 
  complete 
  or 
  effaced. 
  

   Wings 
  ample, 
  longer 
  than 
  the 
  abdomen 
  ; 
  fore 
  wings 
  with 
  3 
  cubital 
  

   areolfcts, 
  the 
  2d 
  oblong 
  or 
  trapeziform, 
  usually 
  much 
  broader 
  than 
  

   high 
  ; 
  stigma 
  lanceolate, 
  attenuated, 
  seldora 
  elliptic 
  or 
  ovate 
  ; 
  

   radial 
  areolet 
  ample 
  ; 
  recurrent 
  nervure 
  evected, 
  seldom 
  inter- 
  

   stitial 
  and 
  very 
  rarely 
  subrejected 
  ; 
  praediscoidal 
  areolet 
  usually 
  

   petiolated. 
  Radius 
  and 
  cubitus 
  of 
  the 
  hind 
  wings 
  faintly 
  traced 
  or 
  

   obsolete 
  ; 
  basal 
  nervures 
  and 
  prsebrachial 
  transverse 
  generally 
  

   distinct 
  : 
  the 
  hind 
  wings 
  occasionally 
  exhibit 
  a 
  pobrachial 
  trans, 
  

   verse 
  nervure, 
  more 
  or 
  less 
  rudimentary 
  (ef. 
  in 
  the 
  fig., 
  see 
  

   " 
  Horismology 
  of 
  Wings," 
  Tr. 
  Ent. 
  Soc. 
  Lond., 
  1885, 
  p. 
  3). 
  Abdo- 
  

   men 
  subsessile 
  or 
  subpetiolated, 
  usually 
  short, 
  ovate, 
  or 
  globose, 
  

   somewhat 
  more 
  elongate 
  in 
  the 
  ^ 
  ; 
  suturiform 
  articulation 
  obsolete 
  

   (except 
  in 
  Ademon 
  and 
  Gnamptodon), 
  the 
  other 
  sutures 
  visible. 
  

   Terebra 
  generally 
  concealed 
  or 
  very 
  short 
  ; 
  rarely 
  half 
  as 
  long, 
  or 
  

   as 
  long, 
  as 
  the 
  abdomen. 
  

  

  Head 
  as 
  broad 
  as 
  the 
  thorax 
  or 
  broader 
  ; 
  antennas 
  slender, 
  

   filiform, 
  usually 
  longer 
  than 
  the 
  body 
  ; 
  face 
  almost 
  always 
  cari. 
  

   nated 
  down 
  the 
  middle 
  ; 
  mandibles 
  large, 
  often 
  emarginate 
  at 
  the 
  

   base 
  beneath; 
  palpi 
  short 
  (except 
  in 
  Hedylus) 
  ; 
  vertex 
  convex 
  

   posteriorly, 
  merging 
  insensibly 
  into 
  the 
  occiput 
  ; 
  ocelli 
  small, 
  de- 
  

   pressed 
  ; 
  prothorax 
  generally 
  inconspicuous 
  ; 
  mesothorax 
  com- 
  

   monly 
  without 
  distinct 
  sutiures, 
  but 
  in 
  other 
  cases 
  these 
  are 
  

   variously 
  developed 
  ; 
  often 
  a 
  rounded 
  or 
  oblong 
  impression 
  is 
  seen 
  

   just 
  before 
  the 
  scutellum 
  ;* 
  abdomen 
  showmg 
  7 
  segments 
  above, 
  of 
  

  

  * 
  Not 
  to 
  be 
  confounded 
  with 
  the 
  transverse 
  cancellated 
  fovea 
  at 
  

   the 
  base 
  of 
  the 
  scutellum, 
  which 
  is 
  common 
  to 
  most 
  parasiti 
  

   Hymenoptera. 
  

  

  TRAN5. 
  E)NT. 
  SOC. 
  LOND. 
  1891. 
  — 
  PART 
  I. 
  (MARCH.) 
  

  

  