﻿114 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.88 
  

  

  Type 
  locality. 
  — 
  Texas. 
  

  

  Type. 
  — 
  In 
  Kieffer's 
  collection. 
  

  

  (21) 
  TRIMORUS 
  ERYTHROPUS 
  (Ashmead) 
  

  

  Prosacantha 
  erythropus 
  Ashmead, 
  U. 
  S. 
  Nat. 
  Mus. 
  Bull. 
  45, 
  p. 
  195, 
  1893 
  (female). 
  

   Hoplogryon 
  erythropus, 
  Kieffkr, 
  Das 
  Tierreich, 
  Lief. 
  48, 
  p. 
  226, 
  1926. 
  

  

  Type 
  locality. 
  — 
  District 
  of 
  Columbia. 
  

   Type.—XJ.S.'N.M. 
  No. 
  24511. 
  

   Described 
  from 
  two 
  specimens. 
  

  

  (22) 
  TRIMORUS 
  CROSBYI, 
  new 
  species 
  

  

  Female. 
  — 
  Length 
  2.0 
  mm. 
  Head 
  about 
  1.9 
  times 
  as 
  wide 
  as 
  long, 
  

   slightly 
  wider 
  than 
  the 
  thorax; 
  frons 
  without 
  a 
  median 
  carina 
  except 
  

   just 
  above 
  antennae; 
  frons 
  immediately 
  above 
  bases 
  of 
  antennae 
  and 
  

   laterally 
  nearly 
  to 
  summits 
  of 
  eyes, 
  and 
  the 
  genae, 
  strongly 
  striate; 
  

   medially 
  the 
  frons 
  is 
  smooth, 
  without 
  sculpture; 
  upper 
  part 
  of 
  frons 
  

   sparsely 
  covered 
  with 
  small 
  pmictures, 
  otherwise 
  without 
  sculpture; 
  

   occiput 
  and 
  genae 
  posteriorly 
  aciculate; 
  scape 
  about 
  1.3 
  times 
  as 
  long 
  

   as 
  the 
  club, 
  1.12 
  times 
  as 
  long 
  as 
  the 
  joints 
  between 
  scape 
  and 
  club 
  

   combined; 
  thorax 
  scarcely 
  longer 
  than 
  wide, 
  as 
  wide 
  as 
  the 
  abdomen; 
  

   mesonotmn 
  thickly 
  pubescent, 
  with 
  a 
  rather 
  strong, 
  somewhat 
  irregu- 
  

   lar 
  reticulation; 
  the 
  intervals 
  between 
  the 
  areas 
  are 
  raised 
  lines 
  so 
  that 
  

   the 
  areas 
  themselves 
  appear 
  as 
  small, 
  shallow 
  depressions; 
  parapsidal 
  

   grooves 
  appearing 
  as 
  irregidar 
  punctate 
  and 
  roughened 
  lines 
  to 
  about 
  

   the 
  middle 
  of 
  the 
  mesonotum; 
  scutellum 
  smooth, 
  pubescent 
  laterally 
  

   and 
  on 
  anterior 
  half, 
  sparsely 
  punctate 
  on 
  anterior 
  half; 
  spine 
  on 
  

   metanotum 
  rather 
  broad 
  basally, 
  sharp 
  apically, 
  reaching 
  a 
  little 
  

   beyond 
  the 
  base 
  of 
  the 
  petiole; 
  posterior 
  angles 
  of 
  propodemn 
  about 
  

   as 
  long 
  as 
  the 
  metanotal 
  spine, 
  acute 
  at 
  apices; 
  abdomen 
  about 
  1.3 
  

   times 
  as 
  long 
  as 
  the 
  head 
  and 
  thorax 
  com.bined, 
  about 
  1.8 
  times 
  as 
  long 
  

   as 
  wide, 
  ovate; 
  petiole 
  traversed 
  longitudinally 
  by 
  a 
  number 
  of 
  rather 
  

   broad 
  gi-ooves 
  which 
  are 
  separated 
  one 
  from 
  another 
  by 
  rounded 
  

   ridges 
  ; 
  dorsal 
  surface 
  of 
  the 
  petiole 
  no 
  t 
  elevated 
  anteriorly 
  and 
  without 
  

   a 
  transverse 
  depression; 
  second 
  tergite 
  with 
  seven 
  longitudinal 
  grooves 
  

   as 
  on 
  the 
  petiole 
  but 
  these 
  grooves 
  wider, 
  extending 
  about 
  to 
  apical 
  

   fifth 
  of 
  the 
  segment, 
  each 
  on 
  posterior 
  half 
  traversed 
  longitudinally 
  

   by 
  a 
  ridge 
  (fig. 
  14) 
  ; 
  posterior 
  to 
  the 
  grooves 
  and 
  ridges 
  the 
  second 
  

   tergite 
  is 
  smooth, 
  without 
  sculpture; 
  third 
  tergite 
  traversed 
  longitudi- 
  

   nally 
  by 
  grooves 
  on 
  anterior 
  half; 
  these 
  grooves 
  are 
  not 
  like 
  those 
  on 
  

   the 
  petiole 
  and 
  second 
  tergite 
  but 
  are 
  about 
  half 
  as 
  wide 
  as 
  on 
  those 
  

   segments 
  and 
  narrow 
  to 
  sharp 
  points 
  apically; 
  the 
  intervals 
  between 
  

   the 
  grooves 
  are 
  flattened, 
  not 
  so 
  convex; 
  toward 
  the 
  middle 
  of 
  the 
  

   segment 
  the 
  gi-ooves 
  become 
  shallower 
  as 
  well 
  as 
  narrower 
  and 
  the 
  

   intervals 
  merge 
  with 
  the 
  flat 
  smooth 
  surface 
  posterior 
  to 
  them; 
  

   laterally 
  the 
  third 
  tergite 
  is 
  smooth, 
  without 
  sculpture 
  except 
  for 
  a 
  

  

  