﻿72 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.67 
  

  

  sheaths 
  as 
  long 
  as 
  the 
  abdomen 
  beyond 
  first 
  tergite. 
  Face 
  yellow; 
  

   vertex 
  and 
  occiput 
  somewhat 
  piceous; 
  thorax 
  mostly 
  black, 
  the 
  

   pleura 
  ferruginous; 
  legs, 
  including 
  all 
  coxae 
  bright 
  testaceous; 
  

   wings 
  very 
  slightly 
  dusky; 
  abdomen 
  yellowish, 
  the 
  first 
  tergite, 
  and 
  

   a 
  basal 
  median 
  spot 
  on 
  the 
  second, 
  blackish 
  ; 
  apical 
  tergites 
  more 
  or 
  

   less 
  brownish. 
  This 
  species 
  is 
  very 
  similar 
  to 
  apicatus, 
  but 
  differs 
  

   especially 
  in 
  the 
  shorter 
  ovipositor. 
  I 
  have 
  seen 
  no 
  males 
  of 
  either 
  

   species; 
  doubtless 
  it 
  will 
  be 
  found 
  almost 
  impossible 
  to 
  separate 
  the 
  

   two 
  species 
  on 
  the 
  basis 
  of 
  this 
  sex. 
  

  

  Distribution. 
  — 
  Branford, 
  Connecticut. 
  

  

  Host. 
  — 
  Unknown. 
  

  

  Known 
  only 
  from 
  the 
  holotype. 
  

  

  60. 
  MICROBRACON 
  CAULICOLA 
  Gahan 
  

  

  Fig. 
  13 
  

  

  Microbracon 
  caulicola 
  Gahan, 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  61, 
  1922, 
  p. 
  2. 
  

  

  Type.— 
  Cat. 
  No. 
  24982, 
  U.S.N.M. 
  

  

  Closely 
  resembles 
  mellitor, 
  but 
  differs 
  in 
  the 
  shorter 
  ovipositor, 
  in 
  

   the 
  longer 
  flagellar 
  segments 
  of 
  antennae, 
  the 
  usually 
  straight 
  pos- 
  

   terior 
  margin 
  of 
  second 
  abdominal 
  tergite; 
  in 
  the 
  second 
  abscissa 
  of 
  

   radius 
  being 
  much 
  more 
  than 
  twice 
  as 
  long 
  as 
  the 
  first, 
  in 
  the 
  radius 
  

   going 
  more 
  nearly 
  to 
  the 
  extreme 
  apex 
  of 
  wing, 
  and 
  in 
  the 
  propodeum 
  

   being 
  usually 
  minutely 
  reticulated 
  over 
  most 
  of 
  its 
  surface. 
  The 
  an- 
  

   tennae 
  are 
  usually 
  29 
  to 
  35-segmented, 
  the 
  two 
  basal 
  flagellar 
  seg- 
  

   ments 
  usually 
  twice 
  as 
  long 
  as 
  thick; 
  propodeum 
  usually 
  delicately 
  

   reticulated, 
  sometimes 
  granular 
  and 
  more 
  strongly 
  sculptured 
  on 
  the 
  

   median 
  line; 
  abdomen 
  broadly 
  oval; 
  the 
  first 
  tergite 
  rugulose 
  later- 
  

   ally 
  and 
  at 
  apex, 
  the 
  second 
  coarsely 
  granular 
  or 
  rugulose; 
  the 
  third 
  

   to 
  sixth 
  tergites 
  in 
  the 
  female, 
  the 
  third 
  to 
  fifth 
  in 
  the 
  male, 
  granular, 
  

   much 
  less 
  strongly 
  sculptured 
  than 
  the 
  second; 
  ovipositor 
  sheaths 
  

   nearly 
  as 
  long 
  as 
  the 
  dorsum 
  of 
  the 
  abdomen 
  beyond 
  first 
  tergite. 
  

   Usually 
  entirely 
  yellow; 
  rarely 
  the 
  propodeum 
  and 
  first 
  abdominal 
  

   tergite 
  more 
  or 
  less 
  fuscous; 
  wings 
  dusky, 
  the 
  stigma 
  nearly 
  always 
  

   yellow 
  except 
  at 
  apex; 
  in 
  some 
  small 
  male 
  specimens 
  the 
  stigma 
  is 
  

   brownish; 
  legs, 
  including 
  all 
  coxae, 
  yellow. 
  

  

  Distribution. 
  — 
  Evidently 
  occurs 
  throughout 
  the 
  eastern 
  half 
  of 
  the 
  

   United 
  States 
  wherever 
  its 
  principal 
  hosts 
  are 
  found. 
  

  

  Hosts. 
  — 
  Pyrausta 
  ainsliei 
  Heinrich; 
  P. 
  penitalis 
  Grote; 
  P. 
  nubilalis 
  

   Huebner. 
  

  

  In 
  addition 
  to 
  the 
  types 
  and 
  the 
  other 
  material 
  mentioned 
  by 
  

   Gahan 
  as 
  being 
  contained 
  in 
  the 
  collection 
  of 
  the 
  National 
  Museum, 
  

   there 
  are 
  two 
  specimens 
  received 
  from 
  R. 
  W. 
  Harned, 
  of 
  Mississippi, 
  

   bearing 
  his 
  No. 
  S4750. 
  At 
  the 
  Corn 
  Borer 
  Laboratory 
  of 
  the 
  Bureau 
  

   of 
  Entomology, 
  at 
  Arlington, 
  Massachusetts, 
  there 
  is 
  a 
  large 
  quantity 
  

   of 
  material 
  of 
  this 
  species, 
  most 
  of 
  it 
  reared 
  from 
  Pyrausta 
  ainsliei, 
  

  

  