﻿64 
  

  

  47 
  (48) 
  Second 
  dorsal 
  segment 
  hardly 
  visibly 
  punctured. 
  O. 
  iopteryx. 
  

  

  48 
  (47) 
  Second 
  segment 
  with 
  shallow, 
  but 
  conspicuous, 
  puncturation. 
  

  

  49 
  (50) 
  Mesonotum 
  very 
  dull, 
  scutellum 
  with 
  sparse 
  and 
  very 
  feeble 
  

  

  punctures. 
  O. 
  illudens. 
  

  

  50 
  (49) 
  Mesonotum 
  not 
  extremely 
  dull, 
  scutellum 
  very 
  distinctly, 
  

  

  generally 
  rather 
  deeply, 
  though 
  remotely, 
  punctured. 
  

  

  O. 
  montantis. 
  

  

  51 
  (46) 
  Propodeum 
  smooth 
  or 
  only 
  with 
  feeble 
  impressions 
  or 
  punc- 
  

  

  tures; 
  costae 
  of 
  second 
  ventral 
  segment 
  sometimes 
  more 
  or 
  

   less 
  effaced 
  or 
  indistinct, 
  at 
  least 
  the 
  middle 
  ones. 
  

  

  52 
  (53) 
  Mesonotum 
  subrugosely 
  punctured, 
  the 
  punctures 
  of 
  two 
  sizes 
  

  

  but 
  the 
  smaller 
  ones 
  conspicuous; 
  second 
  segment 
  beneath 
  

   with 
  a 
  conspicuous 
  triangular 
  depression. 
  O. 
  erro. 
  

  

  53 
  (52) 
  Mesonotum 
  with 
  fine 
  sparse 
  puncturation; 
  second 
  ventral 
  seg- 
  

  

  ment 
  with 
  a 
  narrow 
  and 
  shallow 
  depression, 
  the 
  costae 
  

   usually 
  more 
  or 
  less 
  effaced 
  at 
  least 
  in 
  the 
  middle 
  of 
  the 
  

   series. 
  O. 
  unicus. 
  

  

  54 
  (45) 
  Wings 
  shining 
  fuscous 
  without 
  blue 
  or 
  steely 
  iridescence. 
  

  

  55 
  (56) 
  Large 
  species 
  (about 
  10 
  mm. 
  to 
  apex 
  of 
  second 
  abdominal 
  seg- 
  

  

  ment,) 
  mesonotum 
  subrugosely 
  punctate, 
  the 
  smaller 
  

   punctures 
  being 
  unvisually 
  developed 
  in 
  size 
  as 
  compared 
  

   with 
  the 
  larger, 
  the 
  latter 
  fine 
  and 
  the 
  whole 
  tending 
  to 
  

   run 
  into 
  one 
  another. 
  O. 
  paranaias. 
  

  

  56 
  (55) 
  Small 
  species, 
  less 
  than 
  the 
  above 
  in 
  length; 
  mesonotum 
  without 
  

  

  the 
  sculpture 
  described 
  above. 
  

  

  57 
  (58) 
  Second 
  dorsal 
  segment 
  in 
  dorsal 
  aspect 
  raised 
  into 
  a 
  conico- 
  

  

  tuberculate 
  form 
  at 
  about 
  one-fourth 
  of 
  its 
  length 
  from 
  the 
  

   base. 
  O. 
  pterophaennes. 
  

  

  58 
  (57) 
  Second 
  dorsal 
  segment 
  only 
  convex, 
  not 
  conico-tuberculate. 
  

  

  59 
  (60) 
  Depression 
  of 
  second 
  ventral 
  segment 
  wider 
  and 
  shallower; 
  

  

  female 
  with 
  the 
  scutellum 
  much 
  more 
  feebly 
  punctured 
  

   than 
  the 
  mesonotum. 
  O. 
  dubiosus. 
  

  

  60 
  (59) 
  Depression 
  of 
  second 
  ventral 
  segment 
  narrower 
  and 
  deeper; 
  

  

  female 
  with 
  the 
  punctures 
  of 
  the 
  scutellum 
  not 
  much 
  finer 
  

   and 
  feebler 
  than 
  those 
  of 
  the 
  mesonotum. 
  O. 
  threnodes 
  

  

  (u) 
  SYNOPSIS 
  OF 
  ODYNERUS 
  OF 
  MAUI, 
  MOLOKAI 
  AND 
  LANAI. 
  

  

  1 
  (2) 
  Post-scutellum 
  with 
  a 
  distinct 
  raised 
  serrulate 
  or 
  spinulose 
  ridge 
  

  

  dividing 
  the 
  dorsal 
  and 
  posterior 
  surfaces; 
  second 
  discoidal 
  

   cell 
  about 
  twice 
  as 
  high 
  at 
  the 
  apex 
  as 
  the 
  third 
  is 
  at 
  the 
  

   base. 
  . 
  O. 
  nigripennis 
  , 
  Holmgr. 
  

  

  2 
  (1) 
  Post-scutellum 
  without 
  such 
  a 
  ridge; 
  second 
  discoidal 
  cell 
  gen- 
  

  

  erally 
  much 
  less 
  than 
  twice 
  as 
  high 
  at 
  the 
  apex 
  as 
  the 
  third 
  

   is 
  at 
  the 
  base. 
  

  

  3 
  (30) 
  Abdomen 
  with 
  red-markings, 
  sometimes 
  only 
  the 
  hind 
  margin 
  

  

  of 
  the 
  basal 
  segment 
  with 
  a 
  red 
  band, 
  entire 
  or 
  broken; 
  if 
  

   the 
  abdomen 
  has 
  no 
  red 
  markings, 
  then 
  the 
  mesopleura 
  have 
  

   a 
  red 
  spot. 
  

  

  