﻿4 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL, 
  MUSEUM 
  vol.67 
  

  

  the 
  parapsidal 
  grooves 
  defined 
  only 
  by 
  lines 
  of 
  pubescence, 
  the 
  mesos- 
  

   cutmn 
  being 
  rather 
  flat; 
  mesonotum, 
  pleura 
  and 
  propodeum 
  usually 
  

   smooth 
  and 
  polished, 
  although 
  sometimes 
  very 
  finely 
  sculptured; 
  

   suture 
  between 
  mesoscutum 
  and 
  scutellum 
  finely 
  foveolate; 
  propo- 
  

   deum 
  rarely 
  with 
  a 
  median 
  longitudinal 
  carina, 
  but 
  frequently 
  with 
  

   a 
  stub 
  of 
  a 
  median 
  ridge 
  at 
  apex 
  ; 
  wings 
  varying 
  from 
  clear 
  hyaline 
  

   to 
  strongly 
  infumated; 
  usually 
  dusky 
  on 
  the 
  basal 
  two-thirds; 
  ner- 
  

   vulus 
  interstitial 
  with 
  basal 
  vein 
  ; 
  recurrent 
  vein 
  entering 
  first 
  cubital 
  

   cell 
  ; 
  second 
  cubital 
  cell 
  varying 
  greatly 
  in 
  length, 
  the 
  second 
  abscissa 
  

   of 
  radius 
  being 
  sometimes 
  no 
  longer 
  than 
  the 
  first 
  abscissa, 
  some- 
  

   times 
  much 
  more 
  than 
  twice 
  as 
  long; 
  radius 
  usually 
  attaining 
  wing 
  

   margin 
  near 
  the 
  apex 
  of 
  wing, 
  rarely 
  much 
  before 
  ; 
  spurs 
  of 
  posterior 
  

   tibiae 
  rather 
  short, 
  never 
  distinctly 
  half 
  the 
  metatarsus; 
  abdomen 
  

   elliptical 
  or 
  ovate, 
  conspicuously 
  angled 
  at 
  the 
  junction 
  of 
  first 
  and 
  

   second 
  segments; 
  the 
  first 
  abdominal 
  tergite 
  with 
  lateral 
  membra- 
  

   nous 
  margins, 
  the 
  chitinized 
  plate 
  of 
  this 
  tergite 
  with 
  two 
  oblique 
  

   grooves 
  converging 
  anteriorly; 
  second 
  abdominal 
  tergite 
  without 
  

   lateral 
  oblique 
  diverging 
  impressions; 
  suturiform 
  articulation 
  fre- 
  

   quently 
  broad 
  and 
  foveolate; 
  none 
  of 
  the 
  folio 
  wing 
  sutures 
  deep 
  or 
  

   foveolate; 
  third 
  tergite 
  without 
  transverse 
  or 
  oblique 
  impressions 
  

   setting 
  off 
  the 
  anterior 
  lateral 
  corners 
  of 
  the 
  tergite 
  ; 
  abdomen 
  vary- 
  

   ing 
  from 
  entirely 
  smooth 
  and 
  polished 
  to 
  entirely 
  rugulose 
  or 
  gran- 
  

   ular; 
  ovipositor 
  sheaths 
  varying 
  from 
  less 
  than 
  one-fourth 
  the 
  

   length 
  of 
  the 
  abdomen 
  to 
  longer 
  than 
  the 
  entire 
  body. 
  This 
  genus 
  

   includes 
  the 
  smallest 
  of 
  the 
  Vipiinae; 
  very 
  rarely 
  does 
  the 
  body 
  

   attain 
  a 
  length 
  of 
  5 
  mm. 
  

  

  Microbracon 
  is 
  probably 
  more 
  closely 
  related 
  to 
  Iphiaulax 
  Foer- 
  

   ster 
  and 
  its 
  allies 
  than 
  to 
  any 
  other 
  group 
  of 
  the 
  Vipiinae, 
  although 
  

   its 
  species 
  are 
  much 
  smaller 
  than 
  most 
  species 
  of 
  Iphiaulax 
  and 
  differ 
  

   considerably 
  in 
  general 
  appearance. 
  The 
  species 
  of 
  Microbracon, 
  

   however, 
  always 
  lack 
  the 
  deep 
  and 
  often 
  foveolate 
  abdominal 
  sutures 
  

   usually 
  found 
  in 
  Iphiaulax 
  and 
  lack 
  also 
  the 
  oblique 
  lateral 
  furrows 
  

   on 
  the 
  second 
  tergite, 
  and 
  the 
  anterior 
  corners 
  of 
  the 
  third 
  tergite 
  

   are 
  never 
  set 
  off 
  by 
  transverse 
  impressions. 
  Coeloides 
  of 
  Authors, 
  

   which 
  includes 
  Viereck's 
  Ilabrobraconidea, 
  differs 
  from 
  Microbracon 
  

   especially 
  in 
  the 
  more 
  cubical 
  head, 
  the 
  excavated 
  frons, 
  and 
  the 
  

   short 
  first 
  and 
  second 
  flagellar 
  segments 
  of 
  the 
  antennae 
  which 
  are 
  

   scarcely 
  longer 
  than 
  the 
  pedicel, 
  somewhat 
  hollowed 
  out 
  beneath 
  and 
  

   flaring 
  a 
  little 
  at 
  the 
  apex. 
  The 
  group 
  typified 
  by 
  Atanycolus 
  Foer- 
  

   ster 
  is 
  readily 
  distinguished 
  by 
  the 
  cubical 
  head 
  and 
  impressed 
  

   frons, 
  and 
  the 
  scape, 
  which 
  is 
  large, 
  cylindrical, 
  conspicuousl} 
  7 
  ex- 
  

   cavated 
  at 
  base 
  and 
  apex, 
  with 
  prominent 
  basal 
  and 
  apical 
  margins, 
  

   and 
  supported 
  by 
  a 
  cylindrical 
  stalk. 
  From 
  C 
  ompsobracon 
  Ash- 
  

  

  