﻿aht. 
  8 
  REVISION 
  OF 
  THE 
  GENUS 
  MICROBRACON 
  MUESEBECK 
  7 
  

  

  necessary 
  allowance 
  for 
  sexual 
  variations. 
  It 
  has 
  seemed 
  desirable 
  

   to 
  place 
  several 
  of 
  the 
  species 
  in 
  two 
  different 
  positions 
  in 
  the 
  female 
  

   key. 
  

  

  KEY 
  TO 
  THE 
  SPECIES 
  OF 
  MICROBRACON 
  

  

  1. 
  Mesoscutum 
  and 
  scutellum 
  more 
  or 
  less, 
  the 
  lateral 
  face 
  of 
  pronotum, 
  

  

  the 
  meso- 
  and 
  meta-pleura, 
  propodeum 
  and 
  posterior 
  coxae 
  minutely 
  

  

  closely 
  punctate 
  or 
  reticulate, 
  opaque 
  2. 
  

  

  Mesoscutum, 
  scutellum, 
  lateral 
  face 
  of 
  pronotum 
  mostly, 
  and 
  mesopleura 
  

   smooth 
  and 
  polished 
  10. 
  

  

  2. 
  Second 
  abscissa 
  of 
  radius 
  about 
  twice 
  as 
  long 
  as 
  the 
  first, 
  decidedly 
  

  

  longer 
  than 
  first 
  intercubitus 
  and 
  usually 
  distinctly 
  more 
  than 
  half 
  the 
  

   third 
  abscissa 
  of 
  radius 
  ; 
  pubescence 
  on 
  mesoscutum 
  restricted 
  to 
  the 
  

   region 
  of 
  the 
  parapsidal 
  furrows 
  ; 
  ovipositor 
  sheaths 
  sometimes 
  nearly 
  as 
  

  

  long 
  as 
  the 
  abdomen 
  3. 
  

  

  Second 
  abscissa 
  of 
  radius 
  much 
  less 
  than 
  twice 
  as 
  long 
  as, 
  often 
  scarcely 
  

   longer 
  than, 
  the 
  first, 
  not 
  or 
  scarcely 
  longer 
  than 
  first 
  intercubitus, 
  and 
  

   much 
  less 
  than 
  half 
  the 
  third 
  abscissa 
  of 
  radius 
  ; 
  pubescence 
  on 
  meso- 
  

   scutum 
  usually 
  not 
  restricted 
  to 
  the 
  parapsidal 
  furrows, 
  but 
  arising 
  over 
  

   the 
  surface 
  of 
  the 
  lobes 
  as 
  well; 
  ovipositor 
  sheaths 
  at 
  most 
  but 
  little 
  

   more 
  than 
  half 
  as 
  long 
  as 
  the 
  abdomen 
  5. 
  

  

  3. 
  Parapsidal 
  furrows 
  rather 
  thickly 
  hairy, 
  anteriorly 
  as 
  well 
  as 
  posteriorly; 
  

  

  propodeum 
  without 
  a 
  distinct 
  median 
  longitudinal 
  groove; 
  the 
  portion 
  

   of 
  cubitus 
  between 
  first 
  intercubitus 
  and 
  recurrent 
  about 
  half 
  as 
  long 
  

   as 
  first 
  intercubitus; 
  ovipositor 
  sheaths 
  less 
  than 
  half 
  as 
  long 
  as 
  the 
  

  

  abdomen 
  1. 
  quinnipiacorum 
  Viereck. 
  

  

  Parapsidal 
  grooves 
  sparsely 
  hairy, 
  especially 
  anteriorly 
  ; 
  propodeum 
  with 
  

   a 
  median 
  longitudinal 
  groove; 
  the 
  portion 
  of 
  cubitus 
  between 
  first 
  

   intercubitus 
  and 
  recurrent 
  very 
  short, 
  the 
  recurrent 
  being 
  nearly 
  inter- 
  

   stitial 
  with 
  first 
  intercubitus 
  ; 
  ovipositor 
  sheaths 
  as 
  long 
  as 
  the 
  ab- 
  

   domen 
  beyond 
  first 
  tergite 
  4. 
  

  

  4. 
  Mesoscutum 
  uniformly 
  closely 
  punctate 
  and 
  opaque; 
  frons 
  with 
  a 
  dis- 
  

  

  tinct 
  median 
  longitudinal 
  groove 
  descending 
  from 
  median 
  ocellus 
  ; 
  an- 
  

   tennae 
  slender, 
  the 
  flagellar 
  segments 
  much 
  longer 
  than 
  broad; 
  last 
  

   abscissa 
  of 
  cubitus 
  not 
  distinctly 
  longer 
  than 
  the 
  preceding 
  abscissa 
  ; 
  

   third 
  abscissa 
  of 
  radius 
  not 
  distinctly 
  longer 
  than 
  the 
  first 
  and 
  second 
  

  

  combined 
  2. 
  punctatus, 
  new 
  species. 
  

  

  Mesoscutum 
  shining, 
  smooth 
  and 
  polished 
  anteriorly; 
  frons 
  without 
  a 
  

   distinct 
  groove 
  below 
  median 
  ocellus; 
  flagellar 
  segments 
  of 
  female 
  an- 
  

   tennae 
  rather 
  stout, 
  mostly 
  but 
  very 
  little 
  longer 
  than 
  broad; 
  last 
  

   abscissa 
  of 
  cubitus 
  much 
  longer 
  than 
  the 
  preceding 
  abscissa 
  ; 
  third 
  

   abscissa 
  of 
  radius 
  distinctly 
  longer 
  than 
  the 
  first 
  and 
  second 
  com- 
  

   bined 
  3. 
  sphenophori, 
  new 
  species. 
  

  

  5. 
  Second 
  abdominal 
  tergite 
  rugulose 
  or 
  ruguloso-punctate, 
  usually 
  longi- 
  

  

  tudinally 
  so; 
  if 
  not 
  distinctly 
  rugulose 
  then 
  with 
  a 
  basal 
  median 
  em- 
  

   bossed 
  area 
  set 
  off 
  by 
  short 
  longitudinal 
  grooves; 
  suturiform 
  articula- 
  

   tion 
  usually 
  rather 
  broad 
  and 
  foveolate 
  ; 
  oblique 
  furrows 
  on 
  first 
  tergite 
  

  

  often 
  broad 
  and 
  distinctly 
  foveolate 
  8. 
  

  

  Second 
  abdominal 
  tergite 
  evenly 
  closely 
  punctate, 
  or 
  finely 
  granular, 
  not 
  

   rugulose, 
  and 
  without 
  a 
  basal 
  median 
  area 
  set 
  off 
  by 
  longitudinal 
  im- 
  

   pressions 
  ; 
  suturiform 
  articulation 
  usually 
  very 
  fine; 
  oblique 
  furrows 
  

   on 
  first 
  tergite 
  usually 
  narrow, 
  not 
  foveolate 
  6. 
  

  

  