﻿A 
  REVISION 
  OF 
  THE 
  PARASITIC 
  WASPS 
  OF 
  THE 
  GENUS 
  

   MICROBRACON 
  OCCURRING 
  IN 
  AMERICA 
  NORTH 
  OF 
  

   MEXICO 
  

  

  By 
  C. 
  F. 
  W. 
  Muesebeck 
  

  

  Of 
  the 
  Bureau 
  of 
  Entomology, 
  United 
  States 
  Department 
  of 
  Agriculture 
  

  

  INTRODUCTION 
  

  

  Ashmetid 
  * 
  published 
  the 
  name 
  Microbracon 
  with 
  the 
  following 
  

   description 
  : 
  " 
  I 
  propose 
  this 
  new 
  genus 
  for 
  the 
  reception 
  of 
  those 
  

   species 
  in 
  tlie 
  genus 
  Bracon 
  having 
  the 
  recurrent 
  vein 
  joining 
  the 
  

   first 
  submarginal 
  cell 
  between 
  its 
  middle 
  and 
  its 
  apex, 
  restricting 
  the 
  

   genus 
  Bracon 
  to 
  those 
  species 
  having 
  the 
  recurrent 
  vein 
  interstitial 
  

   with 
  the 
  first 
  transverse 
  cubital. 
  The 
  majority 
  of 
  species 
  belonging 
  

   in 
  this 
  new 
  genus 
  known 
  to 
  me 
  are 
  all 
  small 
  and 
  resemble 
  certain 
  

   Rhyssalids." 
  Subsequently 
  Ashmead 
  2 
  greatly 
  restricted 
  the 
  genus 
  

   Bracon, 
  separating 
  it 
  from 
  Microbracon 
  by 
  a 
  group 
  of 
  characters 
  

   which 
  are 
  certainly 
  not 
  of 
  generic 
  or 
  even 
  of 
  subgeneric 
  value. 
  Since 
  

   that 
  date 
  Viereck 
  3 
  has 
  shown 
  that 
  the 
  name 
  Bracon 
  Fabricius 
  must 
  

   be 
  used 
  for 
  Cremnops 
  Foerster, 
  a 
  genus 
  in 
  the 
  Agathidinae, 
  and 
  4 
  that 
  

   Microbracon 
  Ashmead 
  becomes 
  the 
  valid 
  name 
  for 
  Bracon 
  of 
  Authors 
  

   not 
  Fabricius. 
  

  

  The 
  subfamily 
  formerly 
  known 
  as 
  the 
  Braconinae, 
  for 
  which 
  

   Gahan 
  5 
  proposed 
  the 
  name 
  Vipiinae 
  upon 
  the 
  transfer 
  of 
  Bracon 
  

   Fabricius 
  to 
  another 
  subfamily, 
  has 
  been 
  largely 
  neglected 
  from 
  the 
  

   standpoint 
  of 
  generic 
  revision 
  and 
  is 
  at 
  present 
  very 
  unsatisfactorily 
  

   classified. 
  Many 
  of 
  the 
  genera 
  are 
  poorly 
  defined, 
  and 
  doubtless 
  a 
  

   considerable 
  number 
  must 
  eventually 
  be 
  placed 
  in 
  synonymy. 
  It 
  

   is 
  not, 
  however, 
  the 
  purpose 
  of 
  this 
  paper 
  to 
  present 
  a 
  revision 
  of 
  the 
  

   subfamily 
  Vipiinae, 
  and 
  accordingly 
  the 
  merits 
  of 
  the 
  various 
  generic 
  

   names, 
  apart 
  from 
  those 
  which 
  are 
  here 
  regarded 
  as 
  synonyms 
  of 
  

   Microbracon, 
  will 
  not 
  be 
  discussed. 
  Merely 
  to 
  show 
  the 
  relation 
  of 
  

   Microbracon 
  to 
  the 
  remainder 
  of 
  the 
  subfamily 
  an 
  attempt 
  will 
  be 
  

   made 
  to 
  point 
  out 
  the 
  more 
  important 
  characters 
  distinguishing 
  this 
  

   genus 
  from 
  other 
  genera 
  or 
  groups 
  of 
  genera 
  in 
  our 
  fauna. 
  

  

  1 
  Bull. 
  No. 
  1, 
  Colo. 
  Biol. 
  Assoc, 
  1S90, 
  p. 
  15. 
  

   2 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  23, 
  1900, 
  p. 
  13S. 
  

  

  3 
  Bull. 
  83, 
  U. 
  S. 
  Nat. 
  Mus., 
  1914, 
  pp. 
  23 
  and 
  37. 
  

  

  4 
  Idem, 
  p. 
  94. 
  

  

  5 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  -53, 
  1917, 
  p. 
  196. 
  

  

  No. 
  2580— 
  Proceedings 
  U. 
  S. 
  National 
  Museum. 
  Vol. 
  67, 
  Art. 
  8. 
  

  

  12053 
  — 
  25 
  1 
  1 
  

  

  