﻿130 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.98 
  

  

  (52) 
  TRIMORUS 
  PETIOLATUS, 
  new 
  species 
  

  

  Female. 
  — 
  Length 
  1.0 
  mm. 
  Head 
  slightly 
  wider 
  than 
  the 
  thorax; 
  

   head 
  and 
  dorsum 
  of 
  thorax 
  moderately 
  thickly 
  covered 
  with 
  short 
  

   whitish 
  hairs; 
  frons 
  with 
  a 
  delicate 
  median 
  carina 
  from 
  antennal 
  base 
  

   to 
  anterior 
  ocellus, 
  striate 
  at 
  bases 
  of 
  mandibles 
  on 
  each 
  side 
  halfway 
  

   between 
  the 
  median 
  carina 
  and 
  the 
  inner 
  margin 
  of 
  the 
  eye 
  and 
  extend- 
  

   ing 
  upward 
  as 
  far 
  as 
  the 
  middle 
  of 
  the 
  eye 
  is 
  a 
  narrow 
  reticulate 
  area 
  ; 
  

   except 
  for 
  the 
  striations 
  and 
  reticulations 
  just 
  mentioned 
  the 
  frons 
  

   is 
  polished, 
  without 
  sculpture; 
  vertex 
  without 
  distinct 
  sculpture; 
  

   mesonotum 
  rather 
  finely 
  sculptured, 
  not 
  punctate, 
  with 
  indistinct 
  

   punctures; 
  parapsidal 
  grooves 
  briefly 
  indicated 
  posteriorly; 
  scutellum 
  

   shining, 
  with 
  the 
  anterior 
  half 
  somewhat 
  roughened; 
  spine 
  on 
  metano- 
  

   tum 
  sharp 
  and 
  rather 
  long; 
  abdomen 
  a 
  little 
  more 
  than 
  one 
  and 
  one- 
  

   third 
  times 
  as 
  long 
  as 
  wide, 
  widest 
  just 
  behind 
  the 
  middle; 
  petiole 
  and 
  

   second 
  tergite 
  with 
  numerous 
  grooves 
  separated 
  by 
  sharp 
  ridges, 
  

   these 
  grooves 
  becoming 
  narrower 
  posteriorly; 
  second 
  tergite 
  polished, 
  

   without 
  sculp 
  tiu-e 
  on 
  apical 
  half, 
  twice 
  as 
  long 
  as 
  the 
  first 
  tergite; 
  

   thu'd 
  tergite 
  one 
  and 
  one-half 
  times 
  as 
  wide 
  as 
  long, 
  two 
  and 
  three- 
  

   tenths 
  times 
  as 
  long 
  as 
  the 
  second, 
  very 
  delicately 
  reticulate 
  over 
  its 
  

   entire 
  surface, 
  sparsely 
  pubescent 
  laterally; 
  wings 
  normally 
  developed, 
  

   extending 
  a 
  little 
  beyond 
  the 
  tip 
  of 
  the 
  abdomen; 
  black; 
  legs 
  yellowish 
  

   brown, 
  the 
  femora 
  and 
  tibiae 
  medially 
  darker; 
  petiole 
  rufous; 
  mandi- 
  

   bles 
  yellow; 
  wings 
  faintly 
  brownish. 
  

  

  TyjJe 
  locality. 
  — 
  Cinnamon 
  Lake, 
  Schuyler 
  County, 
  N. 
  Y. 
  

  

  Type.—V.S.N.M. 
  No. 
  57802. 
  

  

  One 
  specimen 
  collected 
  on 
  June 
  5, 
  1925, 
  by 
  Prof. 
  C. 
  R. 
  Crosby, 
  

  

  (53) 
  TRIMORUS 
  RUFOCINCTUS. 
  new 
  species 
  

  

  Female. 
  — 
  Length 
  1.20 
  mm. 
  Head 
  about 
  twice 
  as 
  wide 
  as 
  long, 
  as 
  

   wide 
  as 
  the 
  thorax, 
  with 
  fine 
  white 
  pubescence 
  except 
  medially 
  on 
  the 
  

   frons; 
  vertex 
  and 
  frons 
  with 
  dense 
  impressed 
  reticulation; 
  frons 
  above 
  

   smooth, 
  with 
  small 
  scattered 
  punctures, 
  smooth 
  below, 
  without 
  sculp- 
  

   ture 
  except 
  a 
  fine 
  median 
  carina 
  which 
  extends 
  to 
  the 
  anterior 
  ocellus; 
  

   thorax 
  as 
  wide 
  as 
  long, 
  about 
  as 
  wide 
  as 
  the 
  abdomen; 
  mesonotum 
  

   subopaque, 
  pubescent, 
  densely 
  finely 
  punctate; 
  parapsidal 
  grooves 
  

   briefly 
  indicated 
  posteriorly; 
  scutellum 
  smooth, 
  with 
  fine 
  sculpture 
  

   anteriorly; 
  spine 
  on 
  metanotum 
  rather 
  short, 
  broad 
  basally, 
  acute 
  

   apically; 
  wings 
  extending 
  a 
  little 
  past 
  the 
  apex 
  of 
  the 
  abdomen, 
  

   brownish; 
  abdomen 
  1.7 
  times 
  as 
  long 
  as 
  wide; 
  petiole 
  one 
  and 
  one- 
  

   third 
  times 
  as 
  wide 
  as 
  long, 
  with 
  about 
  a 
  dozen 
  longitudinal 
  grooves 
  

   dorsally, 
  the 
  grooves 
  extending 
  its 
  entire 
  length; 
  petiole 
  not 
  elevated 
  

   anteriorly 
  and 
  without 
  a 
  transverse 
  depression 
  ; 
  second 
  tergite 
  1.5 
  times 
  

   as 
  wide 
  as 
  long, 
  1.7 
  times 
  as 
  long 
  as 
  the 
  petiole, 
  with 
  numerous 
  ridges 
  

   nearly 
  to 
  its 
  apex, 
  these 
  ridges 
  parallel 
  with 
  one 
  another 
  or 
  diverging 
  

   posteriorly; 
  third 
  tergite 
  1.4 
  times 
  as 
  wide 
  as 
  long, 
  two 
  and 
  one-fourth 
  

  

  