﻿63 
  

  

  32 
  (35) 
  Second 
  ventral 
  segment 
  behind 
  the 
  costae 
  with 
  a 
  distinct 
  

  

  impression, 
  which 
  is 
  wide 
  and 
  shallow, 
  or 
  of 
  moderate 
  width 
  

   and 
  depth 
  and 
  of 
  triangular 
  shape 
  (clypeus 
  of 
  male 
  deeply 
  

   or 
  rather 
  deeply 
  emarginate). 
  

  

  33 
  (34) 
  Male 
  with 
  the 
  scape 
  entirely 
  yellow 
  in 
  front; 
  female 
  with 
  a 
  

  

  yellow 
  spot 
  on 
  each 
  side 
  of 
  the 
  propodeum 
  near 
  the 
  insertion 
  

   of 
  the 
  abdomen. 
  O. 
  nautarum. 
  

  

  34 
  (33) 
  Male 
  with 
  the 
  scape 
  black, 
  female 
  with 
  the 
  propodeum 
  without 
  

  

  yellow 
  markings. 
  O. 
  erro, 
  var. 
  

  

  35 
  (32) 
  Second 
  ventral 
  segment 
  behind 
  the 
  costae 
  generally 
  flattened 
  

  

  but 
  without 
  a 
  triangular 
  depression 
  ; 
  when 
  there 
  is 
  a 
  depres- 
  

   sion 
  it 
  is 
  very 
  narrow, 
  linear 
  or 
  sublinear 
  (clypeus 
  of 
  male 
  

   never 
  deeply 
  emarginate, 
  but 
  sometimes 
  an 
  apical 
  impres- 
  

   sion 
  gives 
  it 
  the 
  appearance 
  of 
  having 
  a 
  deeper 
  emargination 
  

   than 
  really 
  exists. 
  

   3G 
  (37) 
  Second 
  ventral 
  segment 
  of 
  abdomen 
  abruptly, 
  but 
  not 
  greatly 
  

   raised 
  from 
  the 
  apices 
  of 
  the 
  costae, 
  depression 
  feeble 
  and 
  

   linear 
  for 
  the 
  most 
  part 
  ; 
  wings 
  shining 
  fuscous 
  without 
  blue 
  

   iridescence. 
  O. 
  waianaeanus. 
  

  

  37 
  (36) 
  Second 
  ventral 
  segment 
  flatfish 
  or 
  slightly 
  convex 
  behind 
  the 
  

  

  costae, 
  never 
  abruptly 
  raised 
  froni 
  their 
  apices, 
  wings 
  fre- 
  

   requently 
  with 
  blue 
  iridescence. 
  

  

  38 
  (39) 
  Costae 
  of 
  second 
  ventral 
  segment 
  very 
  short, 
  shorter 
  than 
  the 
  

  

  tumid 
  basal 
  part 
  of 
  the 
  segment 
  anterior 
  to 
  them. 
  

  

  O. 
  acoelogaster. 
  

  

  39 
  (38) 
  Costae 
  of 
  second 
  ventral 
  segment 
  not 
  very 
  short, 
  the 
  middle 
  

  

  ones 
  generally 
  long 
  and 
  not 
  shorter 
  than 
  the 
  basal 
  division 
  

   of 
  the 
  segment. 
  

  

  40 
  (41) 
  Wings 
  shining 
  fuscous, 
  without 
  distinct 
  blue 
  iridescence, 
  

  

  clypeus 
  and 
  thorax 
  entirely 
  black 
  (female 
  unknown). 
  

  

  O. 
  acyanus. 
  

  

  41 
  (40) 
  Wings 
  dark, 
  with 
  more 
  or 
  less 
  evident 
  blue 
  or 
  steely 
  iridescence 
  

  

  clypeus 
  of 
  male 
  nearly 
  always 
  and 
  thorax 
  often 
  yellow- 
  

   marked. 
  

  

  42 
  (43) 
  Maxillary 
  palpi 
  of 
  female 
  very 
  long 
  and 
  fringed 
  with 
  long 
  

  

  hairs; 
  male 
  with 
  the 
  front 
  of 
  head 
  rather 
  remotely 
  punc- 
  

   tured, 
  maxillary 
  palpi 
  more 
  developed. 
  

  

  P 
  seudopterocheilus 
  relictus. 
  

  

  43 
  (42) 
  Maxillary 
  palpi 
  of 
  female 
  normal; 
  head 
  closely 
  punctate 
  in 
  

  

  front 
  in 
  the 
  male 
  and 
  the 
  palpi 
  less 
  developed. 
  

  

  Odynerus 
  lithophilus. 
  

  

  44 
  (29) 
  Abdomen 
  not 
  yellow-banded, 
  rarely 
  with 
  the 
  margins 
  of 
  some 
  

  

  of 
  the 
  segments 
  faintly 
  and 
  inconspicuously 
  testaceous; 
  

   thorax 
  not 
  yellow-marked. 
  

  

  45 
  (54) 
  Wings 
  dark, 
  with 
  distinct 
  blue 
  or 
  purple 
  iridescence. 
  

  

  46 
  (51) 
  Propodeum 
  rugose 
  or 
  rugosely 
  punctured; 
  second 
  ventral 
  seg- 
  

  

  ment 
  with 
  a 
  wide 
  shallow 
  depression, 
  and 
  all 
  the 
  costae 
  

   well 
  developed. 
  

  

  