﻿art. 
  8 
  REVISION 
  OF 
  THE 
  GENUS 
  MICROBRACON 
  MUESEBECK 
  61 
  

  

  fly. 
  These 
  paratjqoes 
  agree 
  with 
  the 
  type 
  in 
  the 
  essential 
  characters; 
  

   the 
  antennae 
  are 
  28-segmented 
  ; 
  the 
  third 
  and 
  fourth 
  abdominal 
  

   tergites 
  are 
  very 
  faintly 
  partly 
  sculptured. 
  

  

  47. 
  MICROBRACON 
  CEPHI 
  Gahan 
  

  

  Fig. 
  20 
  

  

  Microbracon 
  cephi 
  Gahan, 
  Proc. 
  Eut. 
  Soc. 
  Wash., 
  vol. 
  20, 
  1918. 
  p. 
  19. 
  

   Microbracon 
  cephi 
  Griddle, 
  Can. 
  Ent., 
  vol. 
  55, 
  1923, 
  p. 
  3. 
  

  

  Type.— 
  Cat. 
  No. 
  21772, 
  U.S.N.M. 
  

  

  Transverse 
  diameter 
  of 
  the 
  opening 
  between 
  clypeus 
  and 
  mandibles 
  

   much 
  greater 
  than 
  the 
  distance 
  from 
  this 
  opening 
  to 
  the 
  eyes, 
  in 
  the 
  

   male 
  at 
  least 
  twice 
  as 
  long 
  as 
  the 
  malar 
  space; 
  frons 
  minutely 
  

   punctate 
  or 
  reticulate; 
  antennae 
  rarely 
  with 
  less 
  than 
  35 
  segments: 
  

   all 
  the 
  flagellar 
  segments 
  considerably 
  longer 
  than 
  broad; 
  thorax 
  

   long, 
  rather 
  slender, 
  highly 
  polished; 
  parapsidal 
  furrows 
  sparsely 
  

   hairy; 
  metanotum 
  a 
  little 
  longer 
  than 
  is 
  usual 
  in 
  the 
  genus: 
  

   propodeum 
  usually 
  longer 
  than 
  first 
  abdominal 
  tergite 
  ; 
  last 
  segment 
  

   of 
  posterior 
  tarsi 
  large, 
  usually 
  fully 
  as 
  long 
  as 
  the 
  second 
  tarsal 
  

   segment; 
  second 
  abscissa 
  of 
  radius 
  more 
  than 
  twice 
  as 
  long 
  as 
  the 
  

   first, 
  the 
  third 
  about 
  as 
  long 
  as 
  the 
  first 
  and 
  second 
  combined; 
  

   last 
  abscissa 
  of 
  cubitus 
  usually 
  a 
  little 
  shorter 
  than 
  the 
  preceding- 
  

   abscissa 
  ; 
  abdomen 
  long 
  oval 
  ; 
  first 
  abdominal 
  tergite 
  rugulose 
  later- 
  

   ally 
  and 
  apicaily; 
  second 
  to 
  fifth 
  tergites 
  in 
  the 
  male, 
  second 
  to 
  

   sixth 
  in 
  the 
  female, 
  granular; 
  ovipositor 
  sheaths 
  not 
  distinctly 
  half 
  

   the 
  length 
  of 
  the 
  abdomen, 
  usually 
  appearing 
  much 
  less 
  than 
  half. 
  

   Yellow; 
  usually 
  entirely 
  yellow, 
  or 
  with 
  the 
  mesonotal 
  lobes, 
  

   propodeum 
  and 
  first 
  abdominal 
  tergite 
  piceous 
  to 
  blackish; 
  rarely 
  

   with 
  the 
  thorax 
  almost 
  wholly 
  black 
  and 
  the 
  abdomen 
  mostly 
  

   blackish 
  above; 
  wings 
  a 
  little 
  dusky; 
  legs, 
  including 
  coxae, 
  yellow. 
  

  

  Distribution. 
  — 
  North 
  Dakota; 
  Minnesota; 
  Manitoba, 
  Canada. 
  

   Probably 
  occurs 
  throughout 
  the 
  range 
  of 
  its 
  chief 
  host, 
  the 
  Western 
  

   Wheat-stem 
  Sawfly. 
  

  

  Host. 
  — 
  Cephus 
  cinctus 
  Norton. 
  

  

  In 
  addition 
  to 
  the 
  type 
  series 
  the 
  United 
  States 
  National 
  Museum 
  

   has 
  considerable 
  material, 
  all 
  reared 
  in 
  the 
  Bureau 
  of 
  Entomology, 
  

   by 
  C. 
  N. 
  Ainsiie, 
  from 
  Cephvs 
  cinctvs 
  taken 
  at 
  various 
  points 
  in 
  

   North 
  Dakota 
  and 
  Minnesota. 
  

  

  48. 
  MICROBRACON 
  HEMIMENAE 
  Rohwer 
  

   Fig. 
  11 
  

  

  Uierobracon 
  hemimenae 
  Rohwer, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  49, 
  1915, 
  p. 
  232. 
  

  

  Type.— 
  Cat. 
  No. 
  18434, 
  U.S.N.M. 
  

  

  A 
  very 
  distinct 
  species, 
  combining 
  a 
  black 
  head 
  and 
  black 
  coxae 
  

   with 
  a 
  sculptured 
  frons 
  and 
  a 
  nearly 
  completely 
  sculptured 
  abdomen. 
  

  

  