﻿NO. 
  1960. 
  YALE 
  PERUVIAN 
  EXPEDITION, 
  HYMENOPTERA—ROIIWER. 
  441 
  

  

  Genus 
  PSAMMOCHARES 
  Latreille. 
  

   PSAMMOCHARES 
  (PSAMMOCHARES) 
  DICHROMORPHA, 
  new 
  species. 
  

  

  Readily 
  distinguished 
  by 
  the 
  bluish 
  head 
  and 
  thorax 
  and 
  rufous 
  

   abdomen. 
  

  

  Female. 
  — 
  Length 
  12 
  mm. 
  Stout. 
  Anterior 
  margin 
  of 
  the 
  clypeus 
  

   very 
  shghtly 
  incurved, 
  the 
  lateral 
  angles 
  rounded 
  ; 
  frontal 
  impressed 
  

   hne 
  strong, 
  complete; 
  eyes 
  shghtly 
  convergmg 
  toward 
  the 
  vertex; 
  

   malar 
  space 
  nearly 
  obsolete; 
  ocelli 
  in 
  a 
  low 
  triangle; 
  postocellar 
  line 
  

   not 
  quite 
  twice 
  tlie 
  length 
  of 
  the 
  intraocellar 
  line; 
  antennae 
  of 
  the 
  

   usual 
  type, 
  third 
  joint 
  distinctly 
  longer 
  than 
  the 
  fourth; 
  posterior 
  

   margin 
  of 
  the 
  pronotum 
  angulately 
  emarginate; 
  scutellum 
  flat; 
  

   dorsal 
  aspect 
  of 
  the 
  propodeum 
  with 
  distinct 
  median 
  furrow, 
  the 
  

   posterior 
  aspect 
  obhque 
  and 
  not 
  sharply 
  separated 
  from 
  the 
  dorsal 
  

   aspect; 
  femora 
  rather 
  robust; 
  tarsal 
  comb 
  present; 
  legs 
  rather 
  

   strongly 
  spined, 
  the 
  apical 
  joint 
  of 
  the 
  hind 
  tarsi 
  spinose 
  beneath; 
  

   longer 
  calcarium 
  of 
  the 
  posterior 
  tibise 
  not 
  quite 
  half 
  the 
  length 
  of 
  

   the 
  post-basitarsis; 
  claws 
  not 
  strongly 
  curved, 
  with 
  an 
  erect 
  median 
  

   tooth 
  about 
  the 
  middle; 
  transverse 
  median 
  vein 
  of 
  the 
  fore 
  wings 
  

   nearly 
  its 
  own 
  length 
  beyond 
  the 
  basal; 
  third 
  cubital 
  cell 
  on 
  the 
  

   radius 
  distinctly 
  longer 
  than 
  the 
  second 
  on 
  the 
  same 
  vein; 
  first 
  

   transverse 
  cubitus 
  strongly 
  curved, 
  second 
  cubital 
  cell 
  being 
  much 
  

   narrowed 
  above; 
  third 
  cubital 
  cell 
  receiving 
  'the 
  second 
  recurrent 
  

   vein 
  distinctly 
  before 
  the 
  middle; 
  the 
  third 
  transverse 
  cubitus 
  

   obhque 
  so 
  the 
  third 
  cubital 
  cell 
  is 
  narrowed 
  above; 
  transverse 
  

   median 
  of 
  the 
  hind 
  wings 
  shghtly 
  before 
  the 
  cubitus; 
  abdomen 
  

   cylindrical, 
  normal 
  type; 
  pygidium 
  obtusely 
  rounded 
  apically; 
  

   apical 
  ventral 
  segments 
  truncate; 
  head 
  and 
  thorax 
  black, 
  at 
  least 
  

   black 
  in 
  the 
  places 
  where 
  the 
  pubescence 
  is 
  wanting 
  but 
  very 
  densely, 
  

   closely 
  clothed 
  with 
  an 
  appressed 
  dark 
  blue 
  pubescence 
  which 
  con- 
  

   ceals 
  the 
  color 
  of 
  the 
  thorax 
  and 
  its 
  sculpture; 
  legs 
  and 
  antennae 
  

   black; 
  the 
  femora 
  with 
  appressed 
  pubescence 
  like 
  the 
  thorax; 
  

   abdomen 
  entirely 
  rufous 
  with 
  a 
  fine, 
  appressed, 
  silvery 
  pubescence; 
  

   wings 
  dusky 
  hyaline; 
  venation 
  black. 
  

  

  Cuzco, 
  Peru. 
  Described 
  from 
  one 
  female 
  collected 
  July 
  4, 
  1911, 
  

   at 
  an 
  altitude 
  of 
  11,500 
  feet. 
  

  

  Type.— 
  Cat. 
  No. 
  15108, 
  U.S.N.M. 
  

  

  Genus 
  ARACHNOPHROCTONUS 
  Ashmead. 
  

  

  In 
  Banks' 
  generic 
  synopsis 
  for 
  the 
  North 
  American 
  Psammocharinae 
  

   the 
  genus 
  Arachnojphroctonus 
  is 
  placed 
  in 
  the 
  group 
  which 
  has 
  erect 
  

   hair 
  on 
  the 
  dorsal 
  aspect 
  of 
  the 
  propodeum. 
  According 
  to 
  the 
  type 
  of 
  

   the 
  genus 
  and 
  all 
  the 
  species 
  in 
  the 
  collection 
  of 
  the 
  United 
  States 
  

   National 
  Museum 
  there 
  is 
  no 
  erect 
  hair 
  on 
  the 
  dorsal 
  aspect 
  of 
  the 
  

   propodeum, 
  and 
  the 
  genus, 
  according 
  to 
  Banks' 
  arrangement, 
  wiU 
  

  

  