﻿36 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL, 
  MUSEUM 
  vou 
  07 
  

  

  Distribution. 
  — 
  Ohio; 
  Michigan; 
  Illinois; 
  Massachusetts; 
  Canada. 
  

  

  Host. 
  — 
  Gastroidea 
  cyanea 
  Melsh. 
  

  

  In 
  addition 
  to 
  the 
  type 
  which 
  is 
  from 
  Columbus, 
  Ohio, 
  the 
  Na- 
  

   tional 
  Museum 
  has 
  specimens 
  from 
  Agricultural 
  College, 
  Michigan 
  ; 
  

   Algonquin, 
  Illinois; 
  and 
  Canada 
  (C. 
  F. 
  Baker). 
  There 
  is 
  also 
  a 
  

   specimen, 
  taken 
  at 
  Arlington, 
  Massachusetts, 
  in 
  the 
  collection 
  of 
  the 
  

   Corn 
  Borer 
  Laboratory 
  of 
  the 
  Bureau 
  of 
  Entomology 
  at 
  Arlington. 
  

  

  16. 
  MICROBRACON 
  BRACHYURUS 
  (Ashmead; 
  

  

  Bracon 
  brachyurus 
  Ashmead, 
  Can. 
  Ent., 
  vol. 
  23, 
  1891, 
  p. 
  1. 
  

  

  Type.— 
  Cat. 
  No. 
  6853, 
  U.S.N.M. 
  

  

  Very 
  similar 
  to 
  gastroideae, 
  with 
  which 
  it 
  agrees 
  in 
  the 
  large 
  open- 
  

   ing 
  between 
  clypeus 
  and 
  mandibles, 
  the 
  presence 
  of 
  a 
  median 
  carina 
  

   on 
  the 
  propodeum, 
  the 
  wing 
  venation, 
  the 
  short 
  posterior 
  tarsi, 
  and 
  

   the 
  very 
  short 
  ovipositor. 
  It 
  can 
  be 
  readily 
  distinguished, 
  however, 
  

   by 
  the 
  characters 
  given 
  in 
  the 
  key. 
  The 
  ocelli 
  are 
  exceptionally 
  

   small, 
  the 
  ocell-ocular 
  line 
  being 
  four 
  times 
  the 
  diameter 
  of 
  an 
  

   ocellus; 
  the 
  propodeum 
  more 
  or 
  less 
  finely 
  rugulose; 
  head 
  and 
  

   thorax 
  black; 
  abdomen 
  usually 
  entirely 
  black: 
  posterior 
  coxae 
  black; 
  

   the 
  two 
  anterior 
  pairs 
  usually 
  yellowish. 
  

  

  Distribution. 
  — 
  Ottawa, 
  Canada. 
  

  

  Host. 
  — 
  Unknown. 
  

  

  The 
  United 
  States 
  National 
  Museum 
  has, 
  in 
  addition 
  to 
  the 
  type, 
  

   one 
  other 
  specimen, 
  also 
  from 
  Ottawa, 
  Canada. 
  

  

  17. 
  MICROBRACON 
  MELANASPIS 
  (Ashmead, 
  

  

  Fig. 
  5 
  

  

  Bracon 
  melanaspis 
  Ashmead, 
  Can. 
  Ent., 
  vol. 
  23, 
  1S91, 
  i>. 
  1. 
  

  

  Type.— 
  Cut. 
  No. 
  6863, 
  U.S.N.M. 
  

  

  Distinguished 
  especially 
  by 
  the 
  character 
  of 
  the 
  second 
  tergite 
  as 
  

   described 
  in 
  the 
  key. 
  Frons 
  polished; 
  antennae 
  longer 
  than 
  the 
  

   body; 
  malar 
  space 
  in 
  the 
  female 
  fully 
  as 
  long 
  as 
  the 
  distance 
  be- 
  

   tween 
  clypeal 
  f 
  oveae 
  ; 
  parapsidal 
  grooves 
  rather 
  conspicuously 
  hairy, 
  

   especially 
  posteriorly; 
  propodeum 
  completely 
  polished 
  without 
  a 
  

   suggestion 
  of 
  a 
  stub 
  of 
  a 
  median 
  carina 
  at 
  apex; 
  first 
  abscissa 
  of 
  

   radius 
  about 
  three-fourths 
  the 
  first 
  intercubitus 
  and 
  more 
  than 
  half 
  

   the 
  second 
  abscissa 
  of 
  radius; 
  posterior 
  legs 
  slender; 
  abdomen 
  com- 
  

   pletely 
  polished; 
  the 
  chitinized 
  plate 
  of 
  the 
  first 
  tergite 
  slender, 
  

   parallel-sided; 
  the 
  lateral 
  membranous 
  margins 
  of 
  first 
  tergite 
  

   broad; 
  second 
  tergite 
  with 
  weakly 
  chitinized 
  areas 
  laterally 
  opposite 
  

   the 
  membranous 
  margins 
  of 
  the 
  first 
  tergite; 
  the 
  following 
  tergites 
  

   with 
  the 
  apical 
  margins 
  membranous; 
  suturiform 
  articulation 
  rep- 
  

   resented 
  by 
  a 
  fine 
  impressed 
  arcuate 
  line, 
  without 
  a 
  suggestion 
  of 
  

   foveolae; 
  ovipositor 
  sheaths 
  scarcely 
  half 
  as 
  long 
  as 
  the 
  abdomen. 
  

  

  