﻿PROCEEDINGS 
  OF 
  THE 
  UNITED 
  STATES 
  NATIONAL 
  MUSEUM 
  

  

  issued 
  im^V\_y* 
  Q?J^ 
  ^y 
  '^* 
  

  

  SMITHSONIAN 
  INSTITUTION 
  

  

  U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  Vol. 
  98 
  Washington: 
  1948 
  No. 
  3225 
  

  

  PARASITIC 
  WASPS 
  OF 
  THE 
  GENUS 
  TRIMORUS 
  IN 
  NORTH 
  

  

  AMERICA 
  

  

  By 
  Robert 
  M. 
  Fouts 
  

  

  Arnold 
  Foerster 
  established 
  the 
  genus 
  Trimorus 
  in 
  1856,* 
  indi- 
  

   cating 
  as 
  representatives 
  Gryon 
  nanno 
  Walker 
  and 
  Gryon 
  phlias 
  Wal- 
  

   ker. 
  These 
  two 
  species 
  differed 
  from 
  other 
  species 
  of 
  Gryon 
  Walker 
  

   in 
  having 
  the 
  parapsidal 
  grooves 
  distinct, 
  the 
  metanotum 
  armed 
  with 
  

   a 
  strong 
  though 
  short 
  spine, 
  and 
  the 
  abdomen 
  elongate. 
  Foerster, 
  

   not 
  having 
  before 
  him 
  any 
  specimens 
  referable 
  to 
  Trimorus, 
  stated 
  

   erroneously 
  that 
  the 
  genus 
  was 
  characterized 
  by 
  having 
  the 
  marginal 
  

   vein 
  short 
  and 
  the 
  postmarginal 
  vein 
  very 
  long. 
  According 
  to 
  Kieffer 
  ^ 
  

   the 
  types 
  of 
  nanno 
  and 
  phlias 
  have 
  the 
  marginal 
  vein 
  very 
  long 
  and 
  

   the 
  postmarginal 
  vein 
  absent. 
  Ashmead 
  in 
  1893 
  ^ 
  perpetuated 
  Foer- 
  

   ster's 
  error 
  when 
  he 
  redescribed 
  Trimorus 
  and 
  included 
  his 
  new 
  species 
  

   americanus. 
  This 
  species 
  has 
  been 
  made 
  the 
  type 
  of 
  the 
  genus 
  Pro- 
  

   trimorus 
  Kieffer. 
  

  

  Ashmead's 
  numerous 
  species 
  of 
  Prosacantha 
  * 
  were 
  removed 
  from 
  

   that 
  genus 
  by 
  Kieffer 
  in 
  1908,^ 
  and, 
  since 
  they 
  differed 
  from 
  Hoplo- 
  

   gryon 
  Ashmead 
  only 
  in 
  the 
  relative 
  length 
  and 
  width 
  of 
  the 
  petiole, 
  

   a 
  character 
  of 
  doubtful 
  generic 
  value, 
  they 
  were 
  referred 
  to 
  that 
  genus. 
  

  

  Alan 
  P. 
  Dodd, 
  in 
  1930,^ 
  wrote 
  a 
  paper 
  on 
  the 
  Australian 
  Teleasinae 
  

   in 
  which 
  he 
  described 
  many 
  new 
  Australian 
  species 
  and 
  discussed 
  the 
  

   relationships 
  of 
  the 
  genera, 
  presenting 
  a 
  key 
  to 
  all 
  those 
  recognized 
  

   by 
  him. 
  He 
  showed 
  that 
  the 
  two 
  genera 
  Trimorus 
  Foerster 
  and 
  Hop- 
  

  

  » 
  Hymenopterologische 
  Studien, 
  vol. 
  2, 
  pp. 
  101, 
  104, 
  1856. 
  

   ' 
  Ann. 
  Soc. 
  Sci. 
  Bruxelles, 
  vol. 
  32, 
  p. 
  191, 
  1908. 
  

   » 
  U. 
  S. 
  Nat. 
  Mus. 
  Bull. 
  45, 
  p. 
  138, 
  1893. 
  

  

  * 
  Ibid., 
  pp. 
  185-198. 
  

  

  • 
  Ann. 
  Soc. 
  Sci. 
  Bruxelles, 
  vol. 
  32, 
  p. 
  200, 
  1908. 
  

  

  « 
  Proc. 
  Linn. 
  Soc. 
  New 
  South 
  Wales, 
  vol. 
  55, 
  pp. 
  41-91, 
  1930. 
  

  

  91 
  

  

  