﻿442 
  VROCEEDjyai^ 
  op 
  the 
  national 
  museum. 
  vol.44. 
  

  

  fall 
  near 
  Sericopom'pilus, 
  from 
  which 
  it 
  may 
  be 
  separated 
  by 
  hav- 
  

   ing 
  the 
  hind 
  tarsi 
  spincd, 
  cs})ecially 
  the 
  apical 
  joint 
  beneath; 
  the 
  

   propodeal 
  spiracle 
  opening 
  posteriorly; 
  the 
  abdomen 
  cylindri- 
  

   cal, 
  the 
  first 
  segment 
  subequal 
  in 
  length 
  with 
  the 
  second 
  and 
  not 
  

   narrowed 
  anteriorly; 
  the 
  dorsal 
  aspect 
  of 
  the 
  propodeum 
  with 
  a 
  me- 
  

   dian 
  impressed 
  line, 
  more 
  distinct 
  basally; 
  the 
  posterior 
  margin 
  of 
  

   the 
  pronotum 
  with 
  a 
  longitudinal 
  impressed 
  median 
  line; 
  and 
  the 
  

   species 
  largely 
  ferruginous. 
  In 
  some 
  of 
  the 
  Neotropical 
  species 
  of 
  the 
  

   genus 
  ArachnopJiroctonus 
  the 
  dorsal 
  lateral 
  angles 
  of 
  the 
  pronotum 
  

   are 
  strongly 
  tuberculate. 
  This 
  tuberculation 
  is 
  much 
  stronger 
  in 
  

   tuberculatus 
  Smith. 
  

  

  ARACHNOPHROCTONUS 
  XANTHOPTERUS, 
  new 
  species. 
  

  

  This 
  species 
  is 
  related 
  to 
  tuberculatus 
  (Smith), 
  but 
  may 
  easily 
  be 
  

   separated 
  by 
  not 
  having 
  the 
  wings 
  banded 
  with 
  fuscous. 
  liubigino- 
  

   sus 
  Taschenberg 
  may 
  belong 
  to 
  this 
  genus, 
  but 
  the 
  black 
  on 
  the 
  

   abdomen 
  will 
  readily 
  separate 
  xantJiopterus 
  from 
  Taschenberg's 
  

   species. 
  The 
  yellow 
  wings 
  readily 
  separate 
  xantliopterus 
  from 
  the 
  

   Nearctic 
  ferrugineus 
  . 
  

  

  Female. 
  — 
  Length 
  14 
  mm. 
  Clypeus 
  gently 
  convex, 
  the 
  anterior 
  

   margin 
  nearly 
  truncate; 
  supraclypeal 
  area 
  flat; 
  above 
  and 
  between 
  

   the 
  bases 
  of 
  the 
  antennae 
  is 
  a 
  large 
  rounded 
  tubercule; 
  impressed 
  line 
  

   line-like, 
  complete; 
  Qcelli 
  in 
  a 
  low 
  triangle; 
  postocellar 
  line 
  dis- 
  

   tinctly 
  longer 
  than 
  the 
  ocellocular 
  line; 
  inner 
  margins 
  of 
  the 
  eyes 
  

   curved, 
  closer 
  together 
  at 
  the 
  vertex 
  than 
  at 
  the 
  clypeus; 
  malar 
  

   space 
  short 
  but 
  present; 
  antenna? 
  tapering 
  apically, 
  the 
  thhd 
  joint 
  

   nearly 
  twice 
  as 
  long 
  as 
  the 
  fourth 
  ; 
  posterior 
  margin 
  of 
  the 
  pronotum 
  

   broadly, 
  arcuately 
  emarginate, 
  well 
  developed 
  laterally; 
  metanotum 
  

   with 
  rather 
  long, 
  dense, 
  gray 
  hair; 
  dorsal, 
  posterior 
  lateral 
  angles 
  

   of 
  the 
  propodeum 
  strongly 
  tuberculate; 
  dorsal 
  middle 
  of 
  the 
  pro- 
  

   podeum 
  strongly 
  convex; 
  third 
  cubital 
  cell 
  on 
  the 
  radius 
  subequal 
  

   in 
  length 
  with 
  the 
  distance 
  between 
  the 
  third 
  transverse 
  cubitus 
  and 
  

   the 
  costal 
  margin 
  of 
  the 
  radius; 
  second 
  recurrent 
  vein 
  received 
  

   about 
  the 
  middle 
  of 
  the 
  third 
  cubital 
  cell, 
  first 
  recurrent 
  vein 
  received 
  

   about 
  the 
  apical 
  fifth 
  of 
  the 
  second 
  cubital 
  cell; 
  transverse 
  median 
  

   of 
  the 
  fore 
  wings 
  interstitial 
  wdth 
  the 
  basal 
  vein; 
  transverse 
  median 
  

   of 
  the 
  hind 
  wings 
  interstitial 
  with 
  the 
  cubitus; 
  legs 
  rather 
  strongly 
  

   spined, 
  tarsal 
  claws 
  with 
  an 
  erect 
  inner 
  tooth, 
  tarsal 
  comb 
  well 
  de- 
  

   fined; 
  abdomen 
  normal, 
  the 
  apical 
  dorsal 
  segment 
  broadly 
  rounded 
  

   apically. 
  Ferruginous; 
  four 
  apical 
  joints 
  of 
  the 
  antennas, 
  base 
  of 
  

   the 
  first 
  abdominal 
  segment, 
  narrow 
  apical 
  margin 
  of 
  the 
  first 
  and 
  

   second 
  tergites 
  and 
  most 
  of 
  the 
  thoracic 
  sutures 
  black 
  ; 
  Avings 
  strongly 
  

   yellowish, 
  apices 
  dusky; 
  venation 
  the 
  color 
  of 
  the 
  wings; 
  dorsal 
  

   aspect 
  of 
  the 
  thorax 
  and 
  the 
  mesepisternum 
  with 
  very 
  fme, 
  ap- 
  

   pressed 
  golden 
  pubescence; 
  head 
  with 
  rather 
  sparse, 
  erect, 
  golden 
  

   hair. 
  

  

  