﻿WASPS 
  OF 
  GENUS 
  TRIMORUS 
  — 
  FOUTS 
  107 
  

  

  Two 
  specimens 
  collected 
  by 
  Oscar 
  Wliittaker. 
  

  

  In 
  the 
  paratype 
  the 
  pubescence 
  is 
  absent 
  medially 
  on 
  the 
  third 
  

   tergite. 
  Paratype 
  in 
  Whitaker's 
  collection. 
  

  

  (10) 
  TRIMORUS 
  EXILIS, 
  new 
  species 
  

  

  Female. 
  — 
  Length 
  1.27 
  mm. 
  Head 
  about 
  twice 
  as 
  wide 
  as 
  long, 
  

   1.15 
  times 
  as 
  wide 
  as 
  the 
  thorax, 
  indistinctly 
  narrower 
  than 
  the 
  

   abdomen; 
  frons 
  with 
  a 
  delicate 
  impressed 
  median 
  line 
  to 
  upper 
  third, 
  

   with 
  short 
  striae 
  below, 
  with 
  an 
  impressed-reticulate 
  area 
  laterally 
  

   just 
  above 
  the 
  striae, 
  narrowly 
  reticulate 
  along 
  inner 
  eye 
  margin, 
  

   finely 
  reticulate 
  on 
  upper 
  third, 
  the 
  impressions 
  less 
  distinct 
  medially; 
  

   thorax 
  as 
  wide 
  as 
  long, 
  convex 
  above; 
  mesonotum 
  scaly 
  reticulate, 
  

   the 
  sculpture 
  moderately 
  strong; 
  parapsidal 
  grooves 
  distinct 
  on 
  

   posterior 
  third; 
  scutellum 
  convex, 
  reticulate, 
  more 
  strongly 
  so 
  an- 
  

   teriorly; 
  mesonotum 
  and 
  scutellum 
  evenly 
  pubescent; 
  propodeum 
  

   arcuately 
  emarginate 
  posteriorly, 
  the 
  lateral 
  angles 
  sharp; 
  metanotal 
  

   spine 
  triangular, 
  rather 
  broad 
  basally, 
  acute 
  apically, 
  about 
  half 
  as 
  

   long 
  as 
  the 
  scutellum; 
  abdomen 
  broadly 
  elliptical, 
  1.5 
  times 
  as 
  long 
  

   as 
  wide, 
  1 
  .8 
  times 
  as 
  long 
  as 
  the 
  thorax 
  ; 
  petiole 
  twice 
  as 
  wide 
  as 
  long, 
  

   with 
  numerous 
  narrov/ 
  deep 
  grooves 
  to 
  anterior 
  margin, 
  the 
  anterior 
  

   margin 
  narrowly 
  reflexed 
  ; 
  second 
  tergite 
  about 
  twice 
  as 
  wide 
  as 
  long, 
  

   about 
  twice 
  as 
  long 
  as 
  the 
  petiole, 
  with 
  ridges 
  medially 
  to 
  posterior 
  

   fourth, 
  the 
  ridges 
  becoming 
  progressively 
  shorter 
  laterally, 
  reticulate 
  

   behind 
  these 
  shorter 
  ridges; 
  third 
  tergite 
  1.5 
  times 
  as 
  wide 
  as 
  long, 
  

   2.2 
  times 
  as 
  long 
  as 
  the 
  second, 
  pubescent 
  all 
  over 
  but 
  more 
  sparsely 
  

   so 
  medially, 
  evenly 
  reticulate, 
  the 
  impressions 
  finer 
  along 
  the 
  lateral 
  

   margins, 
  with 
  the 
  posterior 
  margin 
  narrowly 
  smooth, 
  without 
  sculp- 
  

   ture; 
  wings 
  narrow, 
  not 
  quite 
  attaining 
  the 
  apex 
  of 
  the 
  propodeum; 
  

   black; 
  legs 
  very 
  dark 
  brown, 
  the 
  trochanters, 
  tibiae 
  proximally 
  and 
  

   distally, 
  and 
  metatarsi 
  basally, 
  reddish 
  brown. 
  

  

  Type 
  locality. 
  — 
  Chilliwack, 
  British 
  Columbia. 
  

  

  2V^e.— 
  U.S.N.M. 
  No. 
  57777. 
  

  

  One 
  specimen 
  collected 
  September 
  9, 
  1927, 
  by 
  Oscar 
  Whittaker. 
  

  

  (U) 
  TRIMORUS 
  CRASSICEPS. 
  new 
  species 
  

  

  Female. 
  — 
  Length 
  0.97 
  mm. 
  Head 
  about 
  one 
  and 
  one-fourth 
  times 
  

   as 
  wide 
  as 
  long, 
  1.2 
  times 
  as 
  wide 
  as 
  the 
  thorax; 
  frons 
  strongly 
  convex, 
  

   with 
  impressed 
  reticulation 
  and 
  pubescent 
  except 
  medially 
  below, 
  with 
  

   a 
  median 
  carina 
  to 
  anterior 
  ocellus, 
  this 
  carina 
  not 
  distinct 
  except 
  

   below 
  where 
  the 
  surface 
  is 
  smooth; 
  vertex 
  and 
  occiput 
  impressed- 
  

   reticulate 
  like 
  the 
  frons; 
  thorax 
  about 
  as 
  wide 
  as 
  long, 
  somewhat 
  

   flattened 
  above; 
  parapsidal 
  grooves 
  nearly 
  reaching 
  anterior 
  margin 
  

   of 
  mesonotum, 
  sharply 
  indicated; 
  mesonotum 
  scaly-reticulate, 
  the 
  

   sculpture 
  moderately 
  strong; 
  scutellum 
  with 
  dense 
  impressed 
  reticu- 
  

   lation, 
  the 
  areas 
  small; 
  metanotal 
  spine 
  very 
  short, 
  blunt 
  apically, 
  

   a,bout 
  a 
  third 
  the 
  length 
  of 
  the 
  scutellum; 
  wings 
  short, 
  narrow, 
  ex- 
  

  

  