﻿424 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.96 
  

  

  4. 
  Tropi 
  of 
  normal 
  form; 
  propodeimi 
  extending 
  far 
  over 
  hind 
  coxae 
  (pi. 
  51, 
  

  

  figs. 
  29, 
  30) 
  5 
  

  

  Tropi 
  anthophagous, 
  both 
  labium 
  and 
  maxillae 
  unusually 
  long 
  (pi. 
  50, 
  fig, 
  

   25); 
  propodeum 
  hardly 
  extending 
  beyond 
  insertions 
  of 
  hind 
  coxae 
  (pi. 
  51, 
  

   fig. 
  31) 
  3. 
  Rhynchophion 
  Enderlein 
  

  

  5. 
  Joint 
  2 
  of 
  maxillary 
  palpus 
  not 
  inflated; 
  ocelli 
  small, 
  distant 
  from 
  eyes; 
  hind 
  

  

  coxae 
  (pi. 
  51, 
  fig. 
  29) 
  not 
  or 
  barely 
  extending 
  beyond 
  apex 
  of 
  propodeum. 
  

  

  1. 
  Thyreodon 
  Brull6 
  

  

  Joint 
  2 
  of 
  maxillary 
  palpus 
  inflated; 
  ocelli 
  very 
  large, 
  usually 
  touching 
  eyes; 
  

  

  hind 
  coxae 
  (pi. 
  56, 
  fig. 
  87) 
  extending 
  beyond 
  apex 
  of 
  propodeum 
  by 
  nearly 
  

  

  half 
  their 
  length 
  2. 
  Athyreodon 
  Ashmead 
  

  

  6. 
  Hind 
  coxae 
  not 
  extending 
  beyond 
  apex 
  of 
  propodeum; 
  (mandible 
  not 
  strongly 
  

  

  twisted; 
  tergite 
  3 
  emarginate 
  at 
  apex; 
  tarsi 
  stout). 
  

  

  6. 
  Orientospilus 
  Morley 
  

   Hind 
  coxae 
  extending 
  beyond 
  apex 
  of 
  propodeum 
  7 
  

  

  7. 
  [Agreement 
  with 
  a 
  majority 
  of 
  the 
  characters 
  in 
  either 
  alternate 
  determines 
  

  

  the 
  subsequent 
  course 
  of 
  a 
  species 
  through 
  the 
  key.] 
  Mandible 
  gradually 
  

   narrowed 
  from 
  base 
  to 
  apex, 
  not 
  conspicuously 
  twisted 
  (pi. 
  60, 
  figs. 
  17-21); 
  

   pronotal 
  sinus 
  (pi. 
  55, 
  fig. 
  73) 
  broad, 
  exposing 
  spiracular 
  sclerite; 
  meso- 
  

   pleuron 
  with 
  speculum 
  defined 
  below 
  by 
  a 
  more 
  or 
  less 
  distinct 
  obhque 
  

   groove; 
  postpectus 
  not 
  defined 
  (pi. 
  52, 
  fig. 
  41) 
  ; 
  basal 
  constriction 
  of 
  propo- 
  

   deum 
  (pi. 
  52, 
  fig. 
  43) 
  more 
  or 
  less 
  distinctly 
  divided 
  into 
  a 
  median 
  and 
  two 
  

   lateral 
  foveae; 
  tergite 
  2 
  with 
  umbo 
  more 
  or 
  less 
  distinct 
  (pi. 
  56, 
  figs. 
  91, 
  

   92, 
  94-99); 
  spiracles 
  of 
  tergite 
  2 
  distinctly 
  basad 
  of 
  apical 
  third 
  (pi. 
  56, 
  

   figs. 
  90-99) 
  ; 
  stigma 
  triangular, 
  tapering 
  from 
  radius 
  to 
  apex, 
  radius 
  at 
  or 
  

   beyond 
  basal 
  third 
  (pi. 
  53, 
  fig. 
  51); 
  basal 
  abscissa 
  of 
  radius 
  either 
  straight 
  

   and 
  unthickened 
  (pi. 
  53, 
  fig. 
  51) 
  or 
  thickened 
  and 
  curved 
  basally 
  (pi. 
  54, 
  

   fig. 
  54), 
  but 
  never 
  sinuate 
  or 
  thickened 
  in 
  middle; 
  apical 
  abscissa 
  of 
  radius 
  

   (pi. 
  53, 
  fig. 
  51; 
  pi. 
  54, 
  figs. 
  54, 
  55, 
  57) 
  at 
  most 
  only 
  slightly 
  curved 
  forward 
  

   basally; 
  fenestra 
  not 
  at 
  all 
  defined 
  (a 
  hairless 
  area 
  below 
  base 
  of 
  stigma 
  

   should 
  not 
  be 
  confused 
  with 
  fenestra) 
  (pi. 
  53, 
  fig. 
  51; 
  pi. 
  54, 
  figs. 
  54, 
  55, 
  59); 
  

   absoissula 
  curved 
  basally 
  (pi. 
  53, 
  fig. 
  51); 
  nervellus 
  broken 
  from 
  distinctly 
  

   below 
  middle 
  to 
  far 
  above 
  middle, 
  upper 
  abscissa 
  perpendicular 
  (pi. 
  54, 
  

  

  fig. 
  55a) 
  or 
  recUvous 
  (pi. 
  54, 
  figs. 
  54a, 
  59a); 
  scutellum 
  not 
  margined 
  8 
  

  

  Mandible 
  aliruptly 
  narrowed 
  between 
  middle 
  and 
  base 
  and 
  so 
  twisted 
  that 
  

   teeth 
  are 
  in 
  a 
  plane 
  perpendicular 
  to 
  longitudinalaxis 
  of 
  body, 
  apex 
  very 
  

   narrow 
  (pi. 
  50, 
  figs. 
  15, 
  22) 
  ; 
  pronotal 
  sinus 
  (pi. 
  55, 
  fig. 
  74) 
  narrow, 
  spiracular 
  

   sclerite 
  concealed; 
  mesopleuron 
  without 
  a 
  defined 
  speculum; 
  postpectus 
  

   defined, 
  the 
  carina 
  usually 
  complete 
  and 
  closing 
  mesosulcus 
  (pi. 
  52, 
  fig. 
  40) 
  ; 
  

   basal 
  constriction 
  of 
  propodeum 
  (pi. 
  52, 
  fig. 
  44) 
  undivided 
  though 
  some- 
  

   times 
  coarsely 
  foveolate; 
  tergite 
  2 
  without 
  umbo 
  (pi. 
  56, 
  figs. 
  90, 
  93, 
  100, 
  

   101); 
  spiracles 
  of 
  tergite 
  2 
  at 
  or 
  about 
  apical 
  third 
  (pi. 
  56, 
  figs. 
  100, 
  101); 
  

   stigma 
  narrow 
  with 
  radius 
  very 
  near 
  base, 
  usually 
  subparallel-sided 
  beyond 
  

   radius 
  and 
  rather 
  abruptly 
  tapering 
  apically 
  (pi. 
  53, 
  fig. 
  52) 
  ; 
  basal 
  abscissa 
  

   of 
  radius 
  m.ore 
  or 
  less 
  thickened 
  to 
  beyond 
  middle 
  and 
  usually 
  more 
  or 
  less 
  

   sinuate 
  or 
  undulant 
  (pi. 
  53, 
  fig. 
  52; 
  pi. 
  54, 
  figs. 
  61, 
  62; 
  pi. 
  55, 
  figs. 
  63-70); 
  

   apical 
  abscissa 
  of 
  radius 
  (pi. 
  53, 
  fig. 
  52; 
  pi. 
  54, 
  figs. 
  53, 
  56, 
  58, 
  60) 
  strongly 
  

   curved 
  forward 
  basally, 
  then 
  decurved 
  to 
  apex; 
  fenestra 
  (pi. 
  53, 
  fig. 
  52; 
  

   pi. 
  54, 
  figs. 
  61, 
  62; 
  pi. 
  55, 
  figs. 
  63-70) 
  present, 
  with 
  or 
  without 
  scleromes; 
  

   abscissula 
  straight 
  (pi. 
  53, 
  fig. 
  52); 
  nervellus 
  broken 
  below 
  (rarely 
  at) 
  

   middle, 
  upper 
  abscissa 
  inclivous 
  to 
  perpendicular; 
  scutellum 
  margined, 
  

   usually 
  to 
  apex 
  22 
  

  

  