﻿2 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL, 
  MUSEUM 
  vol.67 
  

  

  A 
  study 
  of 
  the 
  genus 
  Microbracon, 
  with 
  the 
  purpose 
  of 
  revising 
  

   the 
  group, 
  has 
  been 
  induced 
  by 
  the 
  abundant 
  rearing 
  of 
  species 
  of 
  

   this 
  genus 
  in 
  the 
  United 
  States 
  Bureau 
  of 
  Entomology 
  in 
  the 
  course 
  

   of 
  work 
  upon 
  various 
  insect 
  pests, 
  and 
  by 
  the 
  difficulty 
  of 
  satis- 
  

   factorily 
  identifying 
  these 
  species. 
  In 
  the 
  prosecution 
  of 
  this 
  study 
  

   the 
  chief 
  repositories 
  of 
  the 
  types, 
  which 
  are 
  the 
  United 
  States 
  Na- 
  

   tional 
  Museum, 
  the 
  Philadelphia 
  Academy 
  of 
  Sciences, 
  the 
  Con- 
  

   necticut 
  Agricultural 
  Experiment 
  Station, 
  and 
  the 
  Museum 
  of 
  Pub- 
  

   lic 
  Instruction 
  in 
  Quebec, 
  have 
  been 
  visited 
  and 
  the 
  types 
  examined. 
  

   Only 
  the 
  types 
  of 
  the 
  following 
  have 
  not 
  been 
  seen 
  : 
  Those 
  of 
  

   Say's 
  four 
  species, 
  which 
  are 
  no 
  longer 
  in 
  existence, 
  so 
  far 
  as 
  known 
  ; 
  

   kansensis 
  Viereck 
  and 
  piceiceps 
  Viereck, 
  which 
  are 
  in 
  the 
  collec- 
  

   tion 
  of 
  the 
  University 
  of 
  Kansas; 
  diversicolor 
  Viereck 
  which 
  is 
  on 
  

   deposit 
  at 
  the 
  California 
  Academy 
  of 
  Sciences 
  ; 
  and 
  rufomarginatus 
  

   Ashmead 
  which 
  could 
  not 
  be 
  located. 
  

  

  This 
  paper 
  is 
  a 
  contribution 
  from 
  the 
  office 
  of 
  Gipsy 
  Moth 
  and 
  

   Brown-tail 
  Moth 
  Investigations, 
  of 
  the 
  Bureau 
  of 
  Entomology, 
  

   United 
  States 
  Department 
  of 
  Agriculture. 
  Grateful 
  acknowledge- 
  

   ment 
  is 
  accorded 
  A. 
  F. 
  Burgess, 
  in 
  charge 
  of 
  this 
  branch 
  of 
  the 
  

   Bureau 
  of 
  Entomology, 
  for 
  encouragement 
  in 
  the 
  work 
  and 
  for 
  

   permission 
  to 
  visit 
  the 
  various 
  institutions 
  in 
  whose 
  collections 
  the 
  

   types 
  are 
  contained. 
  Expression 
  of 
  thanks 
  are 
  also 
  due, 
  and 
  cor- 
  

   dially 
  given, 
  S. 
  A. 
  Rohwer, 
  A. 
  B. 
  Gahan, 
  and 
  R. 
  A. 
  Cushman, 
  of 
  

   the 
  Bureau 
  of 
  Entomology, 
  for 
  helpful 
  suggestions 
  and 
  for 
  the 
  use 
  

   of 
  notes; 
  and 
  Dr. 
  W. 
  E. 
  Britton, 
  of 
  the 
  Connecticut 
  Agricultural 
  

   Experiment 
  Station, 
  Dr. 
  Henry 
  Skinner 
  of 
  the 
  Philadelphia 
  Acad- 
  

   emy 
  of 
  Sciences, 
  and 
  F. 
  N. 
  Correveau, 
  Assistant 
  Curator 
  of 
  the 
  

   Museum 
  of 
  Public 
  Instruction 
  at 
  Quebec, 
  for 
  many 
  kindnesses 
  and 
  

   for 
  permission 
  to 
  examine 
  the 
  types 
  in 
  their 
  custody. 
  

  

  CLASSIFICATION 
  

  

  Superfamily 
  ICHNEUMONOIDEA 
  

  

  Family 
  BRACONIDAE 
  

  

  Subfamily 
  Vipiinae 
  

  

  Braconoidae 
  Foerster, 
  Verh. 
  d. 
  naturh. 
  Ver. 
  pr. 
  Rheinl., 
  vol. 
  19, 
  1S62, 
  pp. 
  

  

  227 
  and 
  234. 
  

   Braconides 
  Marshall, 
  Trans. 
  Ent. 
  Soc. 
  Lond., 
  1SS5, 
  p. 
  1. 
  

   Braconinae 
  Cresson, 
  Syn. 
  Hym. 
  North 
  America, 
  1887, 
  pp. 
  54 
  and 
  56. 
  

   Braconidae 
  Tribe 
  I 
  Marshall, 
  in 
  Andre, 
  Hymen. 
  Eur. 
  et 
  Alg., 
  vol. 
  4, 
  1888, 
  

  

  p. 
  6S. 
  

   Braconinae 
  Ashmead, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  23, 
  1900, 
  p. 
  136. 
  — 
  Szepligeti, 
  

  

  Genera 
  Insectorum, 
  fasc. 
  22, 
  1904, 
  p. 
  10. 
  

   Vipiinae 
  Gahan, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  53, 
  1917, 
  p. 
  196. 
  

  

  Head 
  varying 
  from 
  transverse 
  to 
  cubical; 
  mandibles 
  normal, 
  

   touching 
  or 
  crossing 
  at 
  tips 
  and 
  forming 
  with 
  the 
  emarginate 
  and 
  

  

  