﻿art. 
  8 
  REVISION 
  OF 
  THE 
  GENUS 
  MICROBRACON 
  MUESEBECK 
  41 
  

  

  abdomen 
  entirely 
  smooth 
  and 
  polished; 
  second 
  tergite 
  with 
  a 
  basal 
  

   median 
  area 
  set 
  off 
  by 
  short 
  oblique 
  foveolate 
  furrows, 
  and 
  some- 
  

   times 
  with 
  less 
  distinct 
  longitudinal 
  furrows 
  laterally; 
  second 
  ter- 
  

   gite 
  about 
  as 
  long 
  as 
  the 
  third 
  ; 
  ovipositor 
  sheaths 
  less 
  than 
  half 
  as 
  

   long 
  as 
  the 
  abdomen. 
  Mostly 
  yellowish; 
  face 
  yellow; 
  frons 
  and 
  

   vertex 
  sometimes 
  piceous 
  to 
  blackish; 
  mesonotal 
  lobes, 
  lateral 
  faces 
  

   of 
  scutellum, 
  metathorax, 
  propodeum, 
  and 
  pectus 
  more 
  or 
  less 
  

   piceous, 
  sometimes 
  thorax 
  mostly 
  blackish 
  except 
  on 
  the 
  pleura; 
  

   wings 
  infumated 
  on 
  basal 
  two-thirds; 
  legs 
  yellow, 
  the 
  posterior 
  

   coxae 
  sometimes 
  infuscated; 
  abdomen 
  usually 
  yellowish, 
  with 
  first 
  

   tergite, 
  and 
  the 
  third 
  and 
  following 
  medially, 
  more 
  or 
  less 
  blackish. 
  

  

  Distribution. 
  — 
  Cuero, 
  Texas. 
  

  

  Host. 
  — 
  (Psilocorsis) 
  Cryptolechia, 
  species. 
  

  

  Known 
  only 
  from 
  the 
  type 
  series. 
  

  

  23. 
  MICROBRACON 
  MEROMYZAE 
  (Gahan) 
  

  

  Bracon 
  (Tropidobracon) 
  meromyzae 
  Gahan, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  48, 
  

   1913, 
  p. 
  432. 
  

  

  Type.— 
  Cat. 
  No. 
  16350, 
  U.S.N.M. 
  

  

  Head 
  rather 
  thick 
  antero-posteriorly, 
  not 
  broad; 
  face 
  and 
  frons 
  

   smooth 
  and 
  polished; 
  antennae 
  slender, 
  usually 
  28 
  to 
  32-segmented, 
  

   as 
  long 
  as 
  the 
  body 
  in 
  the 
  female, 
  longer 
  in 
  the 
  male; 
  thorax 
  slender, 
  

   polished; 
  parapsidal 
  grooves 
  sparsely 
  hairy; 
  propodeum 
  polished, 
  

   usually 
  with 
  a 
  nearly 
  complete 
  median 
  longitudinal 
  carina; 
  radius 
  

   going 
  practically 
  to 
  extreme 
  apex 
  of 
  wing; 
  second 
  abscissa 
  of 
  radius 
  

   twice 
  as 
  long 
  as 
  the 
  first; 
  the 
  chitinized 
  plate 
  of 
  first 
  tergite 
  slender, 
  

   rugose 
  laterally 
  and 
  at 
  apex 
  ; 
  second 
  and 
  third 
  tergites 
  finely 
  granu- 
  

   lar, 
  shining; 
  rarely 
  the 
  fourth 
  tergite 
  faintly 
  granular 
  in 
  part; 
  re- 
  

   mainder 
  of 
  dorsum 
  of 
  abdomen 
  smooth 
  and 
  polished; 
  ovipositor 
  

   sheaths 
  less 
  than 
  half 
  the 
  length 
  of 
  abdomen. 
  Head 
  wholly 
  black; 
  

   thorax 
  black, 
  pectus 
  sometimes 
  more 
  or 
  less 
  yellowish; 
  wings 
  very 
  

   slightly 
  dusky; 
  legs, 
  including 
  all 
  coxae, 
  bright 
  yellow; 
  abdomen 
  

   more 
  or 
  less 
  blackish 
  above, 
  second 
  and 
  third 
  tergites 
  mostly 
  yellow. 
  

  

  Distribution. 
  — 
  South 
  Dakota. 
  

  

  Host. 
  — 
  Meromyza 
  americana 
  Fitch. 
  

  

  Known 
  only 
  from 
  the 
  types, 
  and 
  two 
  additional 
  specimens, 
  from 
  

   Brookings, 
  South 
  Dakota, 
  in 
  the 
  United 
  States 
  National 
  Museum. 
  

  

  24. 
  MICROBRACON 
  NIGRIDORSUM 
  (Ashmead) 
  

  

  Bracon 
  nigridorsum 
  Ashmead, 
  Can. 
  Ent., 
  vol. 
  23, 
  1891, 
  p. 
  2. 
  

  

  Type.— 
  Oat. 
  No. 
  6862, 
  U.S.N.M. 
  

  

  Head 
  rather 
  thick 
  antero-posteriorly, 
  the 
  face 
  strongly 
  receding; 
  

   temples 
  broad; 
  eyes 
  short, 
  broad-oval; 
  face 
  and 
  frons 
  smooth 
  and 
  

   polished; 
  antennae 
  slender, 
  35-segmented 
  in 
  the 
  type, 
  the 
  first 
  flagel- 
  

   12053—25 
  i 
  

  

  