﻿92 
  CAMERON, 
  Hymenoptera 
  Orientalia. 
  

  

  of 
  the 
  antennae 
  ; 
  the 
  antennal 
  keels 
  are 
  stout 
  ; 
  looked 
  at 
  

   from 
  the 
  front 
  their 
  lower 
  part 
  is 
  triangular. 
  Face 
  and 
  

   clypeus 
  thickly 
  covered 
  with 
  longish 
  fuscous 
  hair 
  ; 
  the 
  

   clypeus 
  broadly 
  and 
  roundly 
  keeled 
  in 
  the 
  middle 
  ; 
  its 
  

   apex 
  obliquely 
  and 
  roundly 
  depressed 
  ; 
  the 
  depression 
  

   margined 
  above 
  and 
  below 
  ; 
  the 
  tops 
  of 
  the 
  mandibles 
  

   blackish. 
  Prothorax 
  smooth 
  and 
  shining, 
  the 
  upper 
  part 
  

   of 
  the 
  pronotum 
  stoutly 
  margined 
  ; 
  mesonotum 
  smooth 
  

   and 
  shining, 
  covered 
  with 
  long 
  fuscous 
  hair 
  ; 
  the 
  

   depression 
  at 
  the 
  apex 
  of 
  the 
  central 
  lobe 
  is 
  large, 
  

   and 
  has 
  at 
  the 
  base 
  two 
  stout 
  keels 
  which 
  are 
  curved 
  

   backwards 
  in 
  the 
  middle. 
  Median 
  segment 
  depressed 
  

   at 
  the 
  base 
  ; 
  in 
  the 
  middle 
  is 
  a 
  large 
  area 
  wider 
  

   than 
  long, 
  depressed 
  at 
  the 
  apex, 
  where 
  the 
  bounding 
  

   keels 
  are 
  stouter 
  ; 
  there 
  is 
  a 
  similar, 
  but 
  smaller, 
  

   area 
  at 
  the 
  apex. 
  The 
  apex 
  of 
  the 
  propleurae, 
  the 
  

   curved 
  depression 
  on 
  the 
  mesopleurae, 
  and 
  the 
  apex 
  of 
  the 
  

   latter 
  are 
  stoutly 
  striolated 
  ; 
  the 
  lower 
  part 
  of 
  the 
  meta- 
  

   pleurae 
  irregularly, 
  stoutly, 
  longitudinally 
  reticulated. 
  

   Mesosternum 
  thickly 
  covered 
  with 
  fuscous 
  hair 
  ; 
  the 
  

   furrow 
  is 
  wide, 
  crenulated 
  ; 
  its 
  apex 
  is 
  black, 
  wider, 
  and 
  

   has 
  two 
  longitudinal 
  keels, 
  united 
  by 
  a 
  transverse 
  one. 
  

   Wings 
  uniformly 
  dark, 
  smoky 
  violaceous, 
  w 
  r 
  ith 
  black 
  

   stigma 
  and 
  nervures; 
  the 
  branch 
  on 
  the 
  second 
  transverse 
  

   cubital 
  nervure 
  is 
  short 
  and 
  is 
  placed 
  above 
  the 
  middle. 
  

   Abdomen 
  smooth 
  and 
  shining, 
  the 
  base 
  of 
  the 
  petiole 
  

   depressed. 
  The 
  anterior 
  legs 
  are 
  entirely 
  rufo-fulvous 
  ; 
  

   the 
  middle 
  pair 
  rufo-fulvous, 
  with 
  the 
  coxae 
  and 
  tro- 
  

   chanters 
  black. 
  

  

  This 
  species 
  comes 
  near 
  to 
  D. 
  ruficollis 
  Cam. 
  {Man- 
  

   chester 
  Memoirs, 
  vol. 
  xliii. 
  p. 
  98), 
  but 
  that 
  species 
  may 
  be 
  

   known 
  from 
  it 
  by 
  the 
  mesonotum 
  only 
  being 
  rufous, 
  not 
  

   the 
  entire 
  mesothorax, 
  and 
  by 
  the 
  wings 
  being 
  yellowish 
  

   hyaline. 
  

  

  