﻿146 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vor,. 
  os 
  

  

  where 
  they 
  merge 
  into 
  the 
  flat 
  poUshed 
  border 
  of 
  the 
  segment; 
  third 
  

   tergite 
  1.5 
  times 
  as 
  wide 
  as 
  long, 
  2.4 
  times 
  as 
  long 
  as 
  the 
  second, 
  

   evenly 
  reticulate 
  except 
  laterally, 
  and 
  narrowly 
  posteriorly, 
  the 
  areas 
  

   rather 
  small; 
  pubescence 
  sparse 
  laterally 
  on 
  the 
  third 
  tergite, 
  not 
  

   present 
  except 
  laterally; 
  black; 
  legs 
  dark 
  brown, 
  the 
  knees 
  and 
  tarsi 
  

   paler. 
  

  

  Type 
  locality 
  .—HoWyhnvn, 
  British 
  Columbia. 
  

  

  Ti/^e.— 
  U.S.N.M. 
  No. 
  57818. 
  

  

  One 
  specimen 
  collected 
  on 
  August 
  25, 
  1928, 
  by 
  Oscar 
  Wliittaker. 
  

  

  (83) 
  TRIMORUS 
  AMABILIS, 
  new 
  species 
  

  

  Female. 
  — 
  Length 
  1.33 
  mm. 
  Head 
  about 
  twice 
  as 
  wide 
  as 
  long, 
  as 
  

   wide 
  as 
  the 
  thorax, 
  as 
  wide 
  as 
  the 
  abdomen; 
  malar 
  area 
  striate; 
  Irons 
  

   just 
  above 
  malar 
  areas 
  reticulate; 
  frons 
  delicately 
  reticulate 
  and 
  with 
  

   distinct 
  punctures 
  above, 
  with 
  a 
  median 
  carma 
  which 
  vanishes 
  above 
  

   about 
  midway 
  between 
  the 
  antennae 
  and 
  the 
  anterior 
  ocellus; 
  except 
  

   as 
  noted 
  the 
  frons 
  is 
  smooth, 
  unsculptured 
  ; 
  scape 
  about 
  seven 
  times 
  as 
  

   long 
  as 
  thick, 
  about 
  one 
  and 
  one-third 
  times 
  as 
  long 
  as 
  the 
  five 
  follow- 
  

   ing 
  joints 
  combined; 
  third 
  joint 
  about 
  one 
  and 
  one-half 
  times 
  as 
  long 
  

   as 
  thick, 
  subequal 
  to 
  the 
  fourth; 
  club 
  about 
  as 
  long 
  as 
  the 
  scape; 
  

   mesonotum 
  and 
  scutellum 
  reticulate, 
  with 
  rather 
  thick 
  pubescence; 
  

   parapsidal 
  grooves 
  not 
  indicated; 
  spine 
  on 
  metanotum 
  rather 
  broad 
  

   anteriorly, 
  acute 
  at 
  apex, 
  reaching 
  above 
  middle 
  of 
  petiole; 
  lateral 
  

   posterior 
  angles 
  of 
  propodeum 
  projecting 
  slightly, 
  acute; 
  abdomen 
  not 
  

   quite 
  one 
  and 
  one-half 
  times 
  as 
  long 
  as 
  wide, 
  a 
  little 
  longer 
  than 
  the 
  

   head 
  and 
  thorax 
  combined; 
  petiole 
  nearly 
  twice 
  as 
  wide 
  as 
  long, 
  with 
  

   numerous 
  longitudinal 
  grooves 
  separated 
  by 
  naiTOwly 
  rounded 
  ridges, 
  

   these 
  grooves 
  extending 
  nearly 
  to 
  the 
  apex 
  of 
  the 
  segment; 
  viewed 
  

   from 
  the 
  side 
  the 
  upper 
  edge 
  of 
  the 
  petiole 
  is 
  straight; 
  second 
  tergite 
  

   twice 
  as 
  wide 
  as 
  long, 
  not 
  quite 
  twice 
  as 
  long 
  as 
  the 
  petiole, 
  with 
  a 
  

   number 
  of 
  grooves 
  basally 
  which 
  are 
  considerably 
  wider 
  than 
  those 
  on 
  

   the 
  petiole; 
  these 
  grooves 
  medially 
  on 
  the 
  segment 
  become 
  narrower 
  

   posteriorly 
  and 
  extend 
  about 
  to 
  the 
  apical 
  fourth 
  ; 
  behind 
  these 
  grooves 
  

   the 
  surface 
  of 
  the 
  second 
  tergite 
  is 
  smooth, 
  without 
  sculpture; 
  third 
  

   tergite 
  one 
  and 
  one-half 
  times 
  as 
  wide 
  as 
  long, 
  two 
  and 
  one-half 
  times 
  

   as 
  long 
  as 
  the 
  second, 
  entirely 
  closely 
  reticulate, 
  shining; 
  wings 
  light 
  

   brownish, 
  extending 
  slightly 
  past 
  the 
  apex 
  of 
  the 
  abdomen; 
  black; 
  

   trochanters, 
  femora 
  at 
  extreme 
  apices, 
  tibiae 
  at 
  extreme 
  bases 
  and 
  

   apices, 
  and 
  metatarsus 
  of 
  each 
  leg 
  reddish 
  brown. 
  

  

  Type 
  locality.- 
  — 
  Chilliwack, 
  British 
  Columbia. 
  

  

  7V2>e.— 
  U.S.N.M. 
  No. 
  57819. 
  

  

  Two 
  specimens 
  collected 
  by 
  Oscar 
  Whittaker 
  on 
  May 
  29 
  and 
  May 
  

   30, 
  1926. 
  Paratype 
  in 
  Whittaker 
  collection. 
  

  

  