﻿art. 
  8 
  REVISION 
  OF 
  THE 
  GENUS 
  MICROBRACON 
  MUESEBECK 
  37 
  

  

  Black; 
  head 
  and 
  thorax 
  black; 
  abdomen 
  black, 
  the 
  membranous 
  

   parts 
  of 
  the 
  dorsum 
  paler; 
  legs 
  usually 
  blackish. 
  

  

  Distribution. 
  — 
  Ottawa, 
  Canada 
  ; 
  S. 
  W. 
  Harbor, 
  Maine. 
  

  

  Host. 
  — 
  Unknown. 
  

  

  Known 
  only 
  from 
  the 
  type, 
  and 
  one 
  other 
  fine 
  female 
  specimen 
  

   which 
  is 
  in 
  the 
  Boston 
  Societ}^ 
  of 
  Natural 
  History 
  and 
  was 
  taken 
  

   by 
  C. 
  W. 
  Johnson 
  at 
  S. 
  W. 
  Harbor, 
  Maine. 
  July 
  13, 
  1918. 
  

  

  18. 
  MICROBRACON 
  JUNCICOLA 
  (Ashmead) 
  

  

  Bracon 
  jtmcicola 
  Abhmead, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  11, 
  18S9 
  (18SS), 
  p. 
  020. 
  

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

   1917 
  (1916), 
  pp. 
  204 
  and 
  206. 
  

  

  Type. 
  — 
  Cat. 
  No. 
  2911, 
  U.S.N.M. 
  The 
  type 
  of 
  sebequanash 
  is 
  in 
  the 
  

   Connecticut 
  Agricultural 
  Experiment 
  Station 
  at 
  New 
  Haven. 
  

  

  Exceedingly 
  like 
  melanaspis 
  in 
  structure, 
  but 
  is 
  probably 
  a 
  dis- 
  

   tinct 
  species. 
  The 
  few 
  specimens 
  that 
  have 
  been 
  seen 
  differ 
  mark- 
  

   edly 
  in 
  color 
  from 
  the 
  t}-pe 
  of 
  melanaspis, 
  being 
  mostly 
  yellow. 
  

   Face 
  yellow 
  ; 
  thorax 
  and 
  abdomen 
  largely 
  yellow 
  ; 
  legs, 
  including 
  all 
  

   coxae, 
  yellow 
  ; 
  malar 
  space 
  about 
  as 
  in 
  melanaspis; 
  antennae 
  likewise 
  

   are 
  similar, 
  being 
  slender 
  and 
  usually 
  25 
  to 
  30-segmented 
  ; 
  parapsidal 
  

   grooves 
  rather 
  strongly 
  pubescent 
  posteriorly; 
  propodeum 
  com- 
  

   pletely 
  polished 
  with 
  not 
  even 
  an 
  indication 
  of 
  a 
  stub 
  of 
  a 
  median 
  

   ridge 
  at 
  apex; 
  suturiform 
  articulation 
  exceedingly 
  delicate, 
  merely 
  

   a 
  fine 
  impressed 
  line; 
  as 
  in 
  melanaspis, 
  the 
  apical 
  margins 
  of 
  the 
  

   tergites 
  beyond 
  the 
  second 
  are 
  usually 
  more 
  or 
  less 
  membranous; 
  

   ovipositor 
  sheaths 
  hardly 
  half 
  as 
  long 
  as 
  the 
  abdomen. 
  

  

  Distribution. 
  — 
  From 
  Missouri 
  to 
  West 
  Virginia 
  and 
  Connecticut. 
  

  

  Hosts. 
  — 
  Evidently 
  species 
  of 
  Coleophora 
  (Ashmead). 
  

  

  The 
  above 
  notes 
  are 
  based 
  on 
  the 
  types 
  of 
  juncicola 
  and 
  sebequa- 
  

   nash? 
  and 
  on 
  several 
  other 
  specimens 
  in 
  the 
  National 
  Museum 
  from 
  

   the 
  following 
  localities: 
  Highspire, 
  Pennsylvania; 
  Ohio; 
  West 
  

   Virginia; 
  Algonquin, 
  Illinois. 
  

  

  19. 
  MICROBRACON 
  POLITIVENTRIS 
  (Cuskman) 
  

  

  Habrobracon 
  politiventris 
  Cushman, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  55, 
  1919, 
  

   p. 
  517. 
  

  

  Type— 
  Cat. 
  No. 
  21639, 
  U.S.N.M. 
  

  

  Very 
  similar 
  to 
  pygmaeus, 
  which 
  it 
  very 
  closely 
  resembles 
  in 
  size, 
  

   color, 
  habitus, 
  malar 
  space, 
  the 
  sculptured 
  frons 
  and 
  vertex, 
  the 
  

   pubescence 
  of 
  the 
  parapsidal 
  furrows, 
  the 
  color 
  and 
  venation 
  of 
  

   the 
  wings, 
  and 
  in 
  other 
  points. 
  It 
  is 
  often 
  difficult 
  to 
  distinguish 
  

   from 
  that 
  species. 
  

  

  Malar 
  space 
  in 
  the 
  female 
  usually 
  fully 
  as 
  long 
  as 
  the 
  transverse 
  

   diameter 
  of 
  the 
  opening 
  between 
  clypeus 
  and 
  mandibles; 
  vertex 
  and 
  

  

  