﻿10 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.67 
  

  

  18. 
  Wings 
  strongly 
  infumated 
  ; 
  last 
  segment 
  of 
  posterior 
  tarsi 
  unusually 
  large, 
  

  

  broadening 
  strongly 
  from 
  base 
  to 
  apex, 
  much 
  longer 
  than 
  the 
  second 
  seg- 
  

   ment 
  and 
  nearly 
  as 
  long 
  as 
  the 
  metatarsus 
  ; 
  antennae 
  usually 
  24 
  to 
  30- 
  

   segmented 
  ; 
  propodeum 
  mostly 
  smooth 
  except 
  for 
  the 
  median 
  carina 
  

  

  15. 
  gastroideae 
  (Ashmead). 
  

   Wings 
  hyaline 
  or 
  very 
  nearly 
  ; 
  last 
  segment 
  of 
  posterior 
  tarsi 
  not 
  so 
  large 
  ; 
  

  

  antennae 
  usually 
  21 
  to 
  24-segmented 
  ; 
  propodeum 
  finely 
  rugulose 
  

  

  16. 
  brachyurus 
  (Ashmead). 
  

  

  19. 
  Second 
  abdominal 
  tergite 
  with 
  conspicuous, 
  more 
  or 
  less 
  triangular, 
  areas 
  

  

  of 
  weaker 
  chitinization 
  laterally 
  joining 
  the 
  broad 
  membranous 
  margins 
  

   of 
  the 
  first 
  tergite 
  ; 
  second 
  tergite 
  much 
  shorter 
  than 
  the 
  third 
  ; 
  dorsum 
  

   of 
  abdomen 
  entirely 
  smooth 
  and 
  polished, 
  without 
  even 
  a 
  suggestion 
  of 
  

   sculpture 
  ; 
  longitudinal 
  groove 
  on 
  lateral 
  face 
  of 
  pronotum 
  incomplete, 
  

  

  being 
  distinct 
  only 
  anteriorly 
  20. 
  

  

  Second 
  abdominal 
  tergite 
  not 
  as 
  above 
  ; 
  at 
  least 
  not 
  agreeing 
  entirely 
  with 
  

   the 
  above 
  characterization 
  21. 
  

  

  20. 
  Head 
  and 
  thorax 
  black; 
  abdomen 
  mostly 
  black; 
  legs 
  more 
  or 
  less 
  black- 
  

  

  ish 
  17. 
  melanaspis 
  (Ashmead). 
  

  

  Body 
  mostly 
  yellowish 
  or 
  yellowish-brown, 
  legs, 
  including 
  coxae, 
  yellow- 
  

   ish 
  18. 
  juncicola 
  (Ashmead.) 
  

  

  21. 
  Frons 
  entirely, 
  and 
  usually 
  the 
  vertex 
  to 
  some 
  extent, 
  closely 
  minutely 
  

  

  punctate 
  or 
  reticulate 
  and 
  opaque 
  ; 
  parapsidal 
  grooves 
  entirely 
  thickly 
  

   hairy 
  ;*head 
  black 
  with 
  contrasting 
  yellow 
  orbital 
  lines; 
  thorax 
  short 
  and 
  

   stout, 
  black; 
  wings 
  rather 
  strongly 
  dusky 
  on 
  basal 
  half; 
  second 
  abscissa 
  

  

  of 
  radius 
  rarely 
  distinctly 
  twice 
  the 
  first 
  22. 
  

  

  Frons 
  smooth 
  and 
  polished, 
  at 
  most 
  with 
  faint 
  sculpture 
  just 
  above 
  inser- 
  

   tion 
  of 
  antennae; 
  at 
  least 
  not 
  combining 
  all 
  the 
  above 
  characters 
  23. 
  

  

  22. 
  Second 
  abdominal 
  tergite 
  usually 
  smooth 
  and 
  shining, 
  and 
  provided 
  with 
  two 
  

  

  abbreviated 
  oblique 
  foveolate 
  impressions 
  medially 
  toward 
  base 
  ; 
  scattered 
  

   pubescence 
  arising 
  from 
  surface 
  of 
  middle 
  lobe 
  of 
  mesoscutum 
  anteriorly 
  ; 
  

  

  antennae 
  normally 
  21 
  to 
  25-segmented 
  19. 
  politiventris 
  (Cushman). 
  

  

  Second 
  abdominal 
  tergite 
  finely 
  sculptured 
  over 
  nearly 
  its 
  entire 
  surface 
  and 
  

   without 
  such 
  impressions 
  on 
  the 
  basal 
  middle; 
  surface 
  of 
  middle 
  lobe 
  of 
  

   mesoscutum 
  without 
  pubescence 
  although 
  the 
  long 
  hairs 
  arising 
  from 
  the 
  

   parapsidal 
  furrows 
  lie 
  upon 
  the 
  lobes 
  ; 
  antennae 
  normally 
  24 
  to 
  29-seg- 
  

   mented 
  20. 
  pygmaeus 
  (Provancher 
  ). 
  

  

  23. 
  Head 
  thin 
  antero-posteriorly, 
  hardly 
  thicker 
  at 
  insertion 
  of 
  antennae 
  than 
  

  

  at 
  clypeus, 
  the 
  face 
  not 
  distinctly 
  receding 
  ; 
  propodeum 
  completely 
  pol- 
  

   ished, 
  without 
  a 
  stub 
  of 
  a 
  median 
  ridge 
  at 
  apex; 
  first 
  abdominal 
  tergite 
  

   wholly 
  smooth 
  and 
  polished; 
  head 
  and 
  thorax 
  black; 
  coxae 
  black. 
  

  

  21. 
  connecticutorum 
  Viereck. 
  

  

  Head 
  not 
  so 
  thin, 
  rather 
  prominent 
  just 
  below 
  insertion 
  of 
  antennae, 
  the 
  

  

  face 
  receding; 
  propodeum 
  usually 
  with 
  a 
  distinct 
  stub 
  of 
  a 
  median 
  ridge 
  

  

  posteriorly 
  24. 
  

  

  24. 
  Abdomen 
  wholly 
  smooth 
  and 
  polished, 
  the 
  second 
  tergite 
  with 
  two 
  abbrevi- 
  

  

  ated 
  oblique 
  furrows 
  medially 
  setting 
  off 
  a 
  basal 
  median 
  area 
  ; 
  parapsidal 
  

   furrows 
  thickly 
  hairy 
  ; 
  head 
  more 
  than 
  usually 
  thick 
  antero-posteriorly, 
  

   being 
  about 
  as 
  thick 
  antero-posteriorly 
  just 
  below 
  insertion 
  of 
  antennae 
  

   as 
  high 
  ; 
  antennae 
  normally 
  30 
  to 
  32-segmented, 
  tapering 
  distinctly 
  toward 
  

   tip 
  ; 
  face 
  yellow 
  ; 
  thorax 
  usually 
  mostly 
  yellow 
  — 
  22. 
  psilocorsi 
  Viereck. 
  

   Second 
  abdominal 
  tergite 
  without 
  oblique 
  furrows 
  setting 
  off 
  a 
  basal 
  median 
  

   area; 
  parapsidal 
  grooves 
  sparsely 
  hairy; 
  head, 
  including 
  face, 
  and 
  thorax 
  

   black 
  * 
  25. 
  

  

  