﻿art. 
  8 
  REVISION 
  OF 
  THE 
  GENUS 
  MICROBRACON 
  MUESEBECK 
  69 
  

  

  last 
  abscissa 
  of 
  cubitus; 
  radius 
  going 
  practically 
  to 
  extreme 
  apex 
  

   of 
  wing 
  ; 
  abdomen 
  short 
  and 
  broad 
  ; 
  first 
  tergite 
  with 
  the 
  chitinized 
  

   plate 
  large, 
  strongly 
  elevated 
  posteriorly 
  and 
  rugulose 
  laterally 
  and 
  

   along 
  apical 
  margin; 
  second 
  tergite 
  short 
  and 
  broad, 
  slightly 
  

   emarginate 
  medially 
  behind, 
  and 
  finely 
  rugulose 
  or 
  granular 
  ; 
  suturi- 
  

   form 
  articulation 
  arcuate, 
  f 
  oveolate 
  ; 
  third 
  tergite 
  much 
  more 
  finely 
  

   sculptured 
  than 
  the 
  second; 
  fourth, 
  fifth, 
  and 
  sixth 
  tergites 
  very 
  

   delicately 
  sculptured, 
  the 
  sculpture 
  becoming 
  faint 
  on 
  the 
  fifth 
  and 
  

   sixth; 
  ovipositor 
  sheaths 
  about 
  as 
  long 
  as 
  the 
  entire 
  body. 
  Black; 
  

   head 
  including 
  the 
  face, 
  except 
  narrowly 
  along 
  the 
  eyes, 
  black 
  or 
  

   blackish; 
  malar 
  space 
  ferruginous; 
  thorax 
  black, 
  the 
  propleura, 
  

   parapsidal 
  grooves, 
  and 
  space 
  behind 
  the 
  middle 
  lobe 
  of 
  mesoscutum, 
  

   more 
  or 
  less 
  ferruginous; 
  legs, 
  including 
  coxae, 
  testaceous, 
  except 
  

   the 
  apical 
  half 
  of 
  posterior 
  tibiae 
  and 
  the 
  posterior 
  tarsi, 
  which 
  parts 
  

   are 
  blackish; 
  wings 
  slightly 
  dusky; 
  dorsum 
  of 
  abdomen 
  black, 
  yel- 
  

   lowish 
  laterally, 
  the 
  second 
  and 
  third 
  tergites 
  more 
  broadly 
  yel- 
  

   lowish 
  laterally. 
  

  

  Type.— 
  Cat. 
  No. 
  26665, 
  U.S.N.M. 
  

  

  Type-locality. 
  — 
  French 
  Creek, 
  West 
  Virginia. 
  

  

  Host. 
  — 
  Tachypterus 
  quadrigibbus 
  Say. 
  

  

  Described 
  from 
  a 
  single 
  specimen 
  reared 
  by 
  F. 
  E. 
  Brooks 
  under 
  

   Quaintance 
  No. 
  9521. 
  The 
  United 
  States 
  National 
  Museum 
  has 
  

   another 
  female 
  specimen 
  of 
  this 
  species 
  labeled 
  " 
  Stony 
  Island, 
  N. 
  Y., 
  

   July 
  8, 
  1896." 
  

  

  57. 
  MICROBRACON 
  VARIABILIS 
  (Provancher) 
  

  

  Opius 
  variabilis 
  Provancher, 
  Addit. 
  faun. 
  Canad. 
  Hymen., 
  1888, 
  p. 
  382. 
  

   Bracon 
  tortricicola 
  Ashmead, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  11, 
  1889 
  (188S), 
  p. 
  621. 
  

   (Opius 
  variabilis 
  Provancher 
  )=Microbracon 
  dorsator 
  Gahan, 
  Proc. 
  U. 
  S. 
  Nat. 
  

  

  Mus., 
  vol. 
  49, 
  1915, 
  p. 
  93. 
  

   Microbracon 
  dorsator, 
  var. 
  variabilis 
  Viereck, 
  Bull. 
  22, 
  Conn. 
  Geol. 
  and 
  Nat. 
  

  

  Hist. 
  Survey, 
  1917 
  (1916), 
  p. 
  207. 
  

  

  Type. 
  — 
  In 
  the 
  Museum 
  of 
  Public 
  Instruction, 
  Parliament 
  Build- 
  

   ing, 
  Quebec, 
  Canada. 
  The 
  type 
  of 
  tortricicola 
  (Cat. 
  No. 
  2915) 
  is 
  in 
  

   the 
  United 
  States 
  National 
  Museum. 
  

  

  Head 
  not 
  thick, 
  the 
  temples 
  receding 
  directly 
  behind 
  the 
  eyes 
  ; 
  trans- 
  

   verse 
  diameter 
  of 
  the 
  opening 
  between 
  clypeus 
  and 
  mandibles 
  much 
  

   greater 
  than 
  the 
  distance 
  from 
  the 
  opening 
  to 
  the 
  eyes, 
  in 
  the 
  male 
  

   fully 
  twice 
  as 
  long 
  as 
  the 
  malar 
  space, 
  in 
  the 
  female 
  one 
  and 
  one-half 
  

   times 
  as 
  long; 
  face 
  and 
  frons 
  minutely 
  punctate 
  or 
  reticulate; 
  an- 
  

   tennae 
  usually 
  25 
  to 
  32-segmented, 
  all 
  the 
  flagellar 
  segments 
  much 
  

   longer 
  than 
  broad, 
  the 
  first 
  two 
  usually 
  of 
  about 
  equal 
  length 
  and 
  

   twice 
  as 
  long 
  as 
  broad, 
  the 
  apical 
  segments 
  slender 
  ; 
  thorax 
  compact, 
  

   smooth, 
  and 
  polished 
  ; 
  parapsidal 
  grooves 
  sparsely 
  hairy 
  ; 
  propodeum 
  

   polished, 
  with 
  a 
  stub 
  of 
  a 
  median 
  longitudinal 
  ridge 
  at 
  apex 
  ; 
  second 
  

   abscissa 
  of 
  radius 
  more 
  than 
  twice 
  as 
  long 
  as 
  the 
  first 
  ; 
  the 
  third 
  not 
  

  

  