﻿28 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.67 
  

  

  punctate: 
  the 
  scutellimi 
  almost 
  polished; 
  the 
  abdomen 
  beyond 
  the 
  

   second 
  tergite 
  is 
  smooth 
  and 
  shining, 
  only 
  faintly 
  minutely 
  reticulate 
  ; 
  

   the 
  radial 
  cell 
  is 
  exceptionally 
  small, 
  measured 
  along 
  the 
  wing 
  mar- 
  

   gin 
  but 
  little 
  longer 
  than 
  the 
  stigma; 
  the 
  first 
  abscissa 
  of 
  radius 
  is 
  

   usually 
  longer 
  than 
  the 
  second; 
  the 
  only 
  entire 
  female 
  antenna 
  seen 
  

   has 
  22 
  segments, 
  that 
  of 
  the 
  male 
  25. 
  

  

  Distribution. 
  — 
  "Utah; 
  Colorado; 
  Arizona. 
  

  

  Host. 
  — 
  Euxoa, 
  species. 
  

  

  In 
  addition 
  to 
  the 
  type 
  series 
  the 
  United 
  States 
  National 
  Museum 
  

   has 
  one 
  specimen 
  from 
  Chiric 
  Mountains, 
  Arizona 
  (H. 
  G. 
  Hubbard) 
  ; 
  

   and 
  another 
  from 
  Colorado 
  (C. 
  F. 
  Baker). 
  

  

  7. 
  MICROBRACON 
  AMKRICANUS 
  (Ashmead) 
  

  

  Trachyusa 
  amcricana 
  Ashmead, 
  Bull. 
  Colorado 
  Biol. 
  Assoc, 
  1, 
  1S90, 
  p. 
  IS. 
  

   Habrobracon 
  americanus 
  Gahan, 
  Proe. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  55, 
  1919, 
  p. 
  123. 
  

  

  Type.— 
  -Cat, 
  No. 
  13421, 
  U.S.N.M. 
  

  

  Although 
  in 
  his 
  description 
  Ashmead 
  stated 
  that 
  he 
  had 
  but 
  one 
  

   specimen, 
  and 
  that 
  a 
  male, 
  the 
  specimen 
  in 
  the 
  National 
  Museum 
  

   labeled 
  " 
  type 
  " 
  is 
  a 
  female. 
  It 
  agrees 
  in 
  every 
  detail 
  with 
  Ashmead's 
  

   description 
  and 
  I 
  have 
  no 
  doubt 
  whatever 
  that 
  it 
  is 
  the 
  specimen 
  

   which 
  he 
  had 
  before 
  him. 
  The 
  face, 
  f 
  rons, 
  vertex, 
  temples, 
  even 
  occi- 
  

   put 
  to 
  some 
  extent, 
  and 
  the 
  entire 
  thorax, 
  minutely 
  punctate 
  or 
  

   reticulate 
  and 
  opaque; 
  antennae 
  of 
  type 
  23-segmented 
  ; 
  antennae 
  of 
  

   two 
  other 
  specimens, 
  one 
  female 
  and 
  one 
  male, 
  likewise 
  23-segmented, 
  

   not 
  tapering 
  toward 
  tip; 
  the 
  two 
  basal 
  flagellar 
  segments 
  twice 
  as 
  

   long 
  as 
  broad; 
  middle 
  lobe 
  of 
  mesoscutum 
  destitute 
  of 
  pubescence 
  

   medially; 
  propodeum 
  with 
  a 
  distinct 
  median 
  carina 
  on 
  its 
  posterior 
  

   third 
  or 
  half; 
  abdomen 
  beyond 
  second 
  tergite 
  a 
  little 
  more 
  strongly 
  

   punctate 
  and 
  less 
  shining 
  than 
  in 
  erucarum; 
  radial 
  cell 
  short, 
  the 
  

   radius 
  attaining 
  wing 
  margin 
  much 
  before 
  the 
  apex 
  ; 
  second 
  abscissa 
  

   of 
  radius 
  distinctly 
  longer 
  than 
  first, 
  and 
  at 
  least 
  as 
  long 
  as 
  first 
  inter- 
  

   cubitus 
  ; 
  the 
  portion 
  of 
  cubitus 
  between 
  recurrent 
  vein 
  and 
  first 
  inter- 
  

   cubitus 
  decidedly 
  shorter 
  than 
  recurrent; 
  ovipositor 
  sheaths 
  project- 
  

   ing 
  much 
  less 
  than 
  half 
  the 
  length 
  of 
  the 
  abdomen 
  beyond 
  apex 
  of 
  

   the 
  last 
  dorsal 
  segment 
  ; 
  head 
  black 
  except 
  for 
  narrow 
  superior 
  orbi- 
  

   tal 
  lines 
  and 
  a 
  yellowish 
  spot 
  on 
  cheeks 
  adjoining 
  the 
  malar 
  space; 
  

   thorax 
  and 
  abdomen 
  mostly 
  or 
  entirely 
  black; 
  coxae 
  black; 
  remainder 
  

   of 
  legs 
  more 
  or 
  less 
  black 
  ; 
  one 
  male 
  in 
  the 
  National 
  Museum 
  has 
  the 
  

   abdomen 
  almost 
  entirely 
  red, 
  and 
  the 
  antennae 
  22-segmented. 
  

  

  Distribution. 
  — 
  Colorado. 
  

  

  Host. 
  — 
  Unknown 
  . 
  

  

  In 
  addition 
  to 
  the 
  type 
  there 
  are 
  three 
  specimens, 
  one 
  female 
  and 
  

   two 
  males, 
  in 
  the 
  United 
  States 
  National 
  Museum, 
  all 
  from 
  Colorado, 
  

   the 
  female 
  labeled 
  " 
  Colo. 
  2075," 
  the 
  two 
  males 
  " 
  Colo. 
  413." 
  

  

  