﻿20 
  Cameron, 
  Hymcnopteva 
  Oricntalia. 
  

  

  much 
  beyond 
  the 
  middle 
  of 
  the 
  abdomen, 
  sHghtly 
  

   infuscated, 
  the 
  nervures 
  testaceous, 
  the 
  stigma 
  black 
  ; 
  

   at 
  the 
  top 
  the 
  second 
  cubital 
  cellule 
  is 
  slightly 
  wider 
  

   than 
  the 
  space 
  bounded 
  by 
  the 
  first 
  transverse 
  cubital 
  

   and 
  the 
  second 
  recurrent 
  nervures. 
  Legs 
  sparsely 
  

   covered 
  with 
  white 
  pubescence 
  ; 
  the 
  apex 
  of 
  the 
  femora, 
  

   tibiae 
  and 
  tarsi, 
  testaceous 
  ; 
  the 
  hinder 
  tibiae 
  infuscated. 
  

   Abdomen 
  shining. 
  

  

  DiDINEIS 
  ORIENTALIS, 
  Sp. 
  UOV. 
  (PL 
  l6, 
  f. 
  z) 
  . 
  

  

  Niger, 
  mandibidis, 
  scapo 
  antcnnariDn 
  siibtus, 
  tibiis, 
  tarsis 
  

   iegulisque 
  albidis, 
  alis 
  hyalinis, 
  nervis 
  fnscis. 
  d. 
  Long. 
  

   5 
  mm. 
  

  

  Hab. 
  Barrackpore 
  {Rothncy). 
  

  

  Antennas 
  fuscous, 
  darker 
  above, 
  the 
  scape 
  bearing 
  a 
  

   few 
  hairs, 
  the 
  flagellum 
  thickly 
  covered 
  with 
  short 
  pile 
  ; 
  

   the 
  base 
  of 
  the 
  apical 
  joint 
  before 
  the 
  base 
  of 
  the 
  

   curve 
  projecting. 
  Head 
  shining, 
  the 
  vertex 
  with 
  shallow 
  

   closely-pressed 
  punctures, 
  and 
  covered 
  with 
  longish 
  

   blackish 
  hair 
  ; 
  the 
  vertex 
  with 
  the 
  hair 
  shorter 
  and 
  

   closer 
  ; 
  the 
  cheeks 
  and 
  clypeus 
  thickly 
  covered 
  with 
  

   silvery 
  hair, 
  that 
  on 
  the 
  clypeus 
  being 
  the 
  longer. 
  

   Mandibles 
  with 
  longish 
  silvery 
  hair; 
  their 
  base 
  black, 
  

   the 
  rest 
  piceous, 
  with 
  a 
  yellow 
  band 
  between 
  ; 
  the 
  palpi 
  

   yellow. 
  Thorax 
  black, 
  shining, 
  closely 
  covered 
  on 
  the 
  

   pro- 
  and 
  meso-thorax 
  with 
  black 
  hair 
  ; 
  almost 
  impunc- 
  

   tate 
  ; 
  the 
  depression 
  on 
  the 
  propleurae 
  with 
  a 
  few 
  stout, 
  

   oblique 
  keels. 
  In 
  the 
  centre 
  of 
  the 
  median 
  segment 
  is 
  

   a 
  large 
  somewhat 
  triangular 
  area, 
  but 
  with 
  the 
  apex 
  

   rounded, 
  bounded 
  by 
  stout 
  keels, 
  and 
  having 
  in 
  the 
  

   centre 
  of 
  it 
  two 
  slightly 
  diverging 
  keels, 
  which 
  reach 
  

   a 
  little 
  beyond 
  the 
  middle. 
  From 
  the 
  apex 
  of 
  the 
  

   triangle 
  a 
  straight 
  keel 
  runs 
  down 
  to 
  the 
  apex 
  of 
  the 
  

   segment, 
  and 
  in 
  the 
  centre 
  at 
  the 
  side 
  is 
  a 
  somewhat 
  

   semicircular 
  area, 
  which 
  is 
  joined 
  to 
  the 
  central 
  keel 
  

  

  