﻿British 
  Braconidce. 
  31 
  

  

  reaching 
  the 
  extremity 
  of 
  the 
  wing 
  ; 
  2d 
  cubital 
  areolet 
  moderately 
  

   long, 
  scarcely 
  attenuated 
  outwards 
  ; 
  recurrent 
  nervure 
  subinter- 
  

   stitial. 
  Pobrachial 
  transverse 
  nervure 
  of 
  the 
  hind 
  wings 
  distinct. 
  

   Legs 
  testaceous. 
  First 
  abdominal 
  segment 
  stout, 
  rugulose, 
  with 
  

   two 
  basal 
  carinse. 
  Terebra 
  not 
  exserted. 
  This 
  species 
  is 
  larger 
  

   than 
  instabilis 
  (sp. 
  16), 
  with 
  longer 
  antennae, 
  much 
  more 
  ample 
  

   wings, 
  a 
  longer 
  radial 
  areolet, 
  and 
  the 
  recurrent 
  nervure 
  differently 
  

   inserted. 
  Length, 
  1^ 
  ; 
  wings, 
  3^ 
  lines. 
  

  

  Both 
  sexes 
  taken 
  by 
  Haliday 
  in 
  the 
  Hebrides 
  in 
  

   August 
  ; 
  a 
  ? 
  in 
  Devonshire 
  by 
  Walker. 
  

  

  16. 
  Opius 
  instabilis, 
  Wesm. 
  

  

  0. 
  instabilis, 
  Wesm., 
  Nouv. 
  Mem. 
  Ac. 
  Brux., 
  1835, 
  

   p. 
  126 
  ; 
  Hal., 
  Ent. 
  Mag., 
  iv., 
  209, 
  3" 
  ? 
  . 
  

  

  5 
  . 
  Black, 
  abdomen 
  more 
  or 
  less 
  piceous, 
  the 
  'Ad 
  segment 
  some- 
  

   times 
  paler 
  above. 
  Face 
  faintly 
  carinated 
  ; 
  cljpeus 
  and 
  mandibles 
  

   testaceous 
  ; 
  clypeus 
  raised, 
  not 
  closing 
  the 
  mouth 
  ; 
  mandibles 
  

   much 
  dilated 
  at 
  the 
  base 
  ; 
  palpi 
  testaceous. 
  Antennae 
  as 
  long 
  as 
  

   the 
  body, 
  20-jointed 
  (in 
  the 
  J 
  specimens), 
  submoniliform 
  towards 
  

   the 
  apex. 
  Mesothoracic 
  sutures 
  indicated 
  in 
  front 
  by 
  two 
  small 
  

   humeral 
  foveae. 
  A 
  punctiform 
  impression 
  before 
  the 
  scutellum. 
  

   Mesopleurse 
  with 
  an 
  impunctate 
  furrow. 
  Metathorax 
  smooth, 
  

   shining. 
  Wings 
  hyaline, 
  somewhat 
  whitish 
  ; 
  nervures 
  and 
  stigma 
  

   fusco-testaceous 
  ; 
  stigma 
  about 
  six 
  times 
  as 
  long 
  as 
  its 
  greatest 
  

   width, 
  emitting 
  the 
  radius 
  at 
  ^ 
  of 
  its 
  length 
  ; 
  1st 
  abscissa 
  as 
  long 
  

   as 
  half 
  the 
  thickness 
  of 
  the 
  stigma 
  ; 
  2d 
  abscissa 
  almost 
  twice 
  as 
  long 
  

   as 
  the 
  1st 
  intercubital 
  nervure 
  ; 
  3d 
  abscissa 
  straight, 
  ending 
  at 
  

   some 
  distance 
  from 
  the 
  extremity 
  of 
  the 
  wing 
  ; 
  recurrent 
  nervure 
  

   conspicuously 
  evected, 
  so 
  that 
  the 
  2d 
  cubital 
  areolet 
  becomes 
  

   pentagonal. 
  Legs 
  testaceous 
  ; 
  hind 
  coxae 
  blackish, 
  with 
  the 
  inner 
  

   side 
  testaceous 
  ; 
  middle 
  of 
  hind 
  femora, 
  tips 
  of 
  their 
  tibiae, 
  and 
  their 
  

   tarsi, 
  fuscescent. 
  Abdomen 
  depressed 
  ; 
  1st 
  segment 
  slightly 
  rugu- 
  

   lose. 
  Terebra 
  somewhat 
  longer 
  than 
  a 
  quarter 
  of 
  the 
  abdomen. 
  

   <y. 
  Antennae 
  22 
  — 
  24-jointed, 
  joints 
  1 
  — 
  8 
  testaceous 
  beneath, 
  3d 
  

   joint 
  and 
  base 
  of 
  2d 
  testaceous 
  above. 
  Lower 
  part 
  of 
  face, 
  and 
  

   cheeks, 
  testaceous. 
  Legs 
  testaceous 
  ; 
  hind 
  coxae 
  sometimes 
  obscure 
  

   at 
  the 
  apex. 
  Length, 
  1 
  ; 
  wings, 
  2:^ 
  lines. 
  

  

  ? 
  Var. 
  1. 
  Antennae 
  entirely 
  black, 
  25-jointed 
  $ 
  , 
  27-jointed 
  ^ 
  . 
  

   Clypeus 
  black 
  at 
  the 
  base 
  ; 
  lower 
  portion 
  of 
  the 
  cheeks 
  testaceous, 
  

   more 
  or 
  less 
  obscure. 
  Four 
  posterior 
  coxae 
  blackish 
  above. 
  

   Wesmael. 
  

  

  Both 
  sexes 
  may 
  be 
  distinguished 
  from 
  the 
  similar 
  

  

  