﻿art. 
  8 
  REVISION 
  OF 
  THE 
  GENUS 
  MICROBKACON 
  MUESEBECK 
  13 
  

  

  40. 
  Antennae 
  slender, 
  normally 
  22 
  to 
  29-segmented, 
  most 
  of 
  the 
  flagellar 
  seg- 
  

  

  ments 
  twice 
  as 
  long 
  as 
  thick, 
  the 
  basal 
  segments 
  of 
  flagellum 
  more 
  than 
  

   twice 
  as 
  long 
  as 
  thick 
  and 
  not 
  at 
  all 
  thicker, 
  sometimes 
  more 
  slender, 
  

   than 
  the 
  apical 
  segments 
  ; 
  wings 
  perfectly 
  clear 
  hyaline 
  with 
  not 
  even 
  a 
  

   suggestion 
  of 
  duskiness; 
  radius 
  arising 
  much 
  before 
  middle 
  of 
  stigma; 
  

   propodeum 
  smooth 
  and 
  polished 
  ; 
  ovipositor 
  sheaths 
  as 
  long 
  as 
  the 
  abdo- 
  

   men 
  or 
  slightly 
  shorter; 
  legs 
  bright 
  yellow 
  41. 
  

  

  Antennae 
  not 
  as 
  above; 
  if 
  apparently 
  so, 
  then 
  not 
  that 
  combination 
  of 
  

   characters 
  43. 
  

  

  41. 
  Abdomen 
  very 
  finely 
  sculptured, 
  smooth 
  laterally; 
  second 
  tergite 
  minutely 
  

  

  striato-punctate, 
  the 
  following 
  weakly 
  punctate, 
  strongly 
  shining; 
  an- 
  

   tennae 
  normally 
  22 
  to 
  24-segmented 
  ; 
  abdomen 
  usually 
  yellow. 
  

  

  40. 
  pityophthori, 
  new 
  species. 
  

  

  Abdomen 
  coarsely 
  sculptured; 
  suturiform 
  articulation 
  very 
  broad, 
  foveo- 
  

  

  late; 
  antennae 
  normally 
  26 
  to 
  29-segmented; 
  abdomen 
  largely 
  black 
  

  

  above 
  42. 
  

  

  42. 
  Abdomen, 
  especially 
  second 
  tergite, 
  strongly 
  longitudinally 
  rugulose, 
  the 
  

  

  .second 
  tergite 
  usually 
  with 
  a 
  complete 
  median 
  longitudinal 
  raised 
  line; 
  

   parapsidal 
  grooves 
  thickly 
  hairy 
  anteriorly 
  as 
  well 
  as 
  posteriorly; 
  abdo- 
  

   men 
  black 
  above, 
  more 
  or 
  less 
  yellow 
  medially 
  on 
  third, 
  fourth 
  and 
  

  

  fifth 
  tergites 
  41. 
  laemosacci, 
  new 
  species. 
  

  

  Abdomen, 
  coarsely 
  granular 
  ; 
  parapsidal 
  grooves 
  not 
  thickly 
  hairy 
  anter- 
  

   iorly; 
  abdomen 
  blackish 
  above, 
  yellow 
  laterally. 
  

  

  42. 
  metacomet 
  Viereck. 
  

  

  43. 
  Wings 
  long 
  and 
  rather 
  narrow, 
  uniformly 
  somewhat 
  infumated, 
  the 
  wing 
  

  

  membrane 
  abnormally 
  thickly 
  hairy 
  over 
  its 
  entire 
  surface; 
  cubitus 
  and 
  

   subdiscoideus 
  nearly 
  parallel, 
  the 
  second 
  discoidal 
  cell 
  scarcely 
  broad- 
  

   ening 
  apically 
  ; 
  radial 
  ce^l 
  very 
  long, 
  the 
  radius 
  going 
  to 
  extreme 
  apex 
  

   of 
  wing; 
  propodeum 
  entirely 
  finely 
  rugulose; 
  antennae 
  slender, 
  nor- 
  

   mally 
  more 
  than 
  40-segmented 
  ; 
  ovipositor 
  sheaths 
  as 
  long 
  as 
  the 
  abdo- 
  

   men 
  or 
  slightly 
  longer 
  43. 
  atricollis 
  (Ashmead). 
  

  

  Wings 
  not 
  as 
  above; 
  otherwise 
  not 
  that 
  combination 
  of 
  characters 
  44. 
  

  

  44. 
  Propodeum 
  entirely, 
  except 
  at 
  extreme 
  base, 
  rugulose 
  ; 
  most 
  of 
  the 
  flagellar 
  

  

  segments 
  of 
  antennae 
  scarcely 
  longer 
  than 
  broad 
  ; 
  abdomen 
  beyond 
  third 
  

   tergite 
  very 
  faintly, 
  almost 
  indistinctly, 
  sculptured 
  ; 
  thorax 
  mostly 
  

  

  yellow 
  45. 
  

  

  Propodeum 
  usually 
  smooth 
  and 
  polished, 
  although 
  often 
  with 
  short 
  diverg- 
  

   ing 
  ridges 
  medially 
  behind, 
  and 
  sometimes 
  very 
  delicately 
  punctate 
  or 
  

   faintly 
  minutely 
  reticulate 
  over 
  a 
  large 
  part 
  of 
  its 
  surface 
  46. 
  

  

  45. 
  Ovipositer 
  sheaths 
  considerably 
  longer 
  than 
  the 
  abdomen 
  ; 
  antennae 
  nor- 
  

  

  mally 
  33 
  to 
  36-segmented 
  ; 
  second 
  abdominal 
  tergite 
  rather 
  evenly 
  finely 
  

   sculptured, 
  without 
  a 
  rugose 
  area 
  on 
  basal 
  middle. 
  

  

  44. 
  analcidis 
  (Ashmead). 
  

  

  Ovipositor 
  sheaths 
  a 
  little 
  shorter 
  than 
  the 
  abdomen 
  ; 
  antennae 
  normally 
  

  

  29 
  to 
  32-segmented 
  ; 
  second 
  abdominal 
  tergite 
  with 
  an 
  irregularly 
  rugulose 
  

  

  area 
  on 
  basal 
  middle 
  45. 
  podunkorum 
  Viereck. 
  

  

  46. 
  Ovipositor 
  sheaths 
  not 
  half 
  as 
  long 
  as 
  the 
  abdomen 
  47. 
  

  

  Ovipositor 
  sheaths 
  more 
  than 
  half 
  as 
  long 
  as 
  the 
  abdomen 
  50. 
  

  

  47. 
  Head, 
  including 
  the 
  face, 
  black; 
  either 
  the 
  frons 
  completely 
  smooth 
  and 
  

  

  polished 
  or 
  the 
  parapsidal 
  grooves 
  thickly 
  hairy 
  48. 
  

  

  At 
  least 
  the 
  face 
  yellow 
  ; 
  parapsidal 
  grooves 
  sparsely 
  hairy 
  ; 
  frons 
  finely 
  

   reticulately 
  sculptured 
  49. 
  

  

  