﻿art. 
  8 
  REVISION 
  OF 
  THE 
  GENUS 
  MICROBRACON 
  MUESEBECK 
  3 
  

  

  anteriorly 
  somewhat 
  elevated 
  clypeus, 
  a 
  more 
  or 
  less 
  circular 
  open- 
  

   ing 
  ; 
  occiput 
  entirely 
  immargined 
  ; 
  anterior 
  wing 
  6 
  with 
  three 
  cubital 
  

   cells; 
  first 
  discoidal 
  cell 
  always 
  separated 
  from 
  the 
  first 
  cubital; 
  sub- 
  

   discoideus 
  never 
  interstitial 
  with 
  the 
  first 
  abscissa 
  of 
  discoideus; 
  

   second 
  abscissa 
  of 
  discoideus 
  always 
  much 
  longer 
  than 
  third; 
  sub- 
  

   mediellan 
  cell 
  very 
  short, 
  never 
  more 
  than 
  one-fourth 
  the 
  mediellan 
  

   cell; 
  cubitella 
  originating 
  at 
  the 
  end 
  of 
  mediella; 
  postnervellus 
  

   absent. 
  

  

  Genus 
  MICROBRACON 
  Ashmead 
  

  

  Bracon 
  Nees 
  (part), 
  Hymen. 
  Icheum. 
  affin. 
  Monogr., 
  vol. 
  1, 
  1834, 
  p. 
  46. 
  — 
  

   Foersteb, 
  Verh. 
  naturh. 
  Ver. 
  pr. 
  Rheinl., 
  vol. 
  19, 
  1862, 
  p. 
  235. 
  — 
  Marshall, 
  

   Trans. 
  Ent. 
  Soc. 
  London, 
  1885, 
  p. 
  11. 
  — 
  Cresson, 
  Synopsis 
  Hymen. 
  N. 
  

   Am., 
  18S7, 
  p. 
  56. 
  

  

  Microbracon 
  Ashmead, 
  Bull. 
  Colorado 
  Biol. 
  Assoc. 
  1, 
  1S90, 
  p. 
  15. 
  

   Genotype. 
  — 
  Microbracon 
  sulcifrons 
  Ashmead 
  (Monobasic). 
  

  

  Habrobracon 
  (Ashmead) 
  Johnson, 
  Ent. 
  News, 
  vol. 
  6, 
  1895, 
  p. 
  324. 
  

  

  Genotype. 
  — 
  Bracon 
  gelechiae 
  Ashmead 
  (By 
  designation 
  of 
  Viereck, 
  Bull. 
  

   83, 
  U. 
  S. 
  Nat. 
  Mus., 
  1914, 
  p. 
  65). 
  

  

  Macrodyctium 
  Ashmead, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  23, 
  1900, 
  p. 
  138. 
  

   Genotype. 
  — 
  Bracon 
  euurae 
  Ashmead 
  (Monabasic). 
  

  

  Bracon 
  Ashmead, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  23, 
  1900, 
  p. 
  139. 
  

  

  Habrobracon 
  Ashmead, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  23, 
  1900, 
  p. 
  139. 
  

  

  Tropidobracon 
  Ashmead, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  23, 
  1900, 
  p. 
  139. 
  Geno- 
  

   type. 
  — 
  Bracon 
  gastroideae 
  Ashmead 
  (Monobasic). 
  

  

  Liobracon 
  (Ashmead) 
  Nason, 
  not 
  Szepligeti, 
  Ent. 
  News, 
  vol. 
  16, 
  1905, 
  p. 
  298. 
  

   Genotype. 
  — 
  Bracon 
  nuperus 
  Cresson 
  (Monobasic). 
  

  

  Bracon 
  Szepligeti, 
  Genera 
  Insectorum, 
  fasc. 
  22, 
  1904, 
  p. 
  27. 
  

  

  Amyosoma 
  Viereck, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  44, 
  1918, 
  p. 
  640. 
  

   Genotype. 
  — 
  Amyosoma 
  chilonis 
  Viereck 
  (Monobasic). 
  

  

  Habrobracon 
  Cushman, 
  Proc. 
  Ent. 
  Soc. 
  Wash., 
  vol. 
  16, 
  1914, 
  p. 
  99. 
  

  

  Habrobracon 
  Viereck, 
  Bull. 
  22, 
  Conn. 
  State 
  Geol. 
  and 
  Nat. 
  Hist. 
  Survey, 
  

   1917 
  (1916), 
  pp. 
  182 
  and 
  209. 
  

  

  Microbracon 
  Viereck, 
  Bull. 
  22, 
  Conn. 
  State 
  Geol. 
  and 
  Nat. 
  Hist. 
  Survey, 
  1917 
  

   (1916), 
  pp. 
  182 
  and 
  204. 
  

  

  Head 
  transverse 
  to 
  subquadrate, 
  never 
  rostriform, 
  always 
  wider 
  

   than 
  long 
  antero-posteriorly 
  ; 
  malar 
  space 
  variable 
  but 
  always 
  much 
  

   less 
  than 
  half 
  the 
  eye 
  height; 
  eyes 
  oval, 
  rather 
  broad, 
  bare 
  or 
  indis- 
  

   tinctly 
  very 
  sparsely 
  hairy; 
  frons 
  not 
  or 
  scarcely 
  impressed; 
  scape 
  

   short, 
  not 
  or 
  hardly 
  longer 
  than 
  first 
  flagellar 
  segment, 
  broadening 
  

   evenly 
  from 
  base 
  to 
  apex, 
  not 
  excavated, 
  and 
  not 
  prominently 
  

   rimmed 
  at 
  apex 
  ; 
  first 
  segment 
  of 
  flagellum 
  alwaj's 
  much 
  longer 
  than 
  

   pedicel, 
  as 
  long 
  as 
  or 
  longer 
  than 
  the 
  second, 
  and 
  never 
  excavated 
  

   below 
  nor 
  with 
  a 
  prominent 
  rim 
  at 
  apex 
  ; 
  antennal 
  segments 
  varying 
  

   in 
  number 
  from 
  thirteen 
  to 
  forty 
  or 
  more; 
  parapsidal 
  grooves 
  

   usually 
  well 
  indicated, 
  with 
  the 
  mesonotal 
  lobes 
  distinct; 
  sometimes 
  

  

  6 
  The 
  wing 
  venation 
  terminology 
  employed 
  in 
  this 
  paper 
  is 
  that 
  proposed 
  by 
  Rohwer 
  

   and 
  Gahan, 
  Proc. 
  Ent. 
  Soc. 
  Wash., 
  vol. 
  18, 
  1916, 
  pp. 
  20-76. 
  

  

  