﻿82 
  CAMERON, 
  Hymenoptera 
  Orientalia. 
  

  

  closely 
  striated 
  ; 
  the 
  apical 
  segment 
  smooth. 
  In 
  the 
  centre 
  

   of 
  the 
  base 
  of 
  the 
  second 
  segment 
  is 
  a 
  raised 
  keel, 
  which 
  

   becomes 
  gradually 
  narrowed 
  to 
  a 
  sharp 
  point, 
  finely 
  and 
  

   closely 
  punctured 
  at 
  the 
  base; 
  the 
  rest 
  much 
  more 
  strongly 
  

   and 
  irregularly 
  ; 
  the 
  lateral 
  depression 
  on 
  the 
  second 
  seg- 
  

   ment, 
  wide, 
  oblique, 
  shallow 
  ; 
  on 
  the 
  third 
  it 
  is 
  shallower 
  ; 
  

   on 
  the 
  fourth 
  shorter, 
  curved, 
  not 
  so 
  oblique. 
  

  

  ^ 
  Spinaria 
  albiventris, 
  sp. 
  nov. 
  

  

  Rufo-fulva 
  ; 
  metathorace 
  pedibusque 
  posticis 
  nigris 
  ; 
  

   abdomine 
  a/bo, 
  supra 
  late 
  nigro-maculato 
  ; 
  a/is 
  fulvo- 
  

   fumatis. 
  $ 
  . 
  

  

  Long. 
  12 
  mm. 
  

  

  Head 
  small, 
  shining, 
  uniformly 
  rufo-fulvous 
  ; 
  smooth, 
  

   the 
  vertex 
  with 
  a 
  few 
  fuscous 
  hairs 
  ; 
  the 
  face 
  above 
  with 
  

   long 
  fuscous, 
  below 
  with 
  some 
  longer 
  fulvous, 
  hairs 
  ; 
  the 
  

   face 
  projecting 
  in 
  the 
  middle, 
  with 
  an 
  elongated 
  fovea 
  

   above 
  ; 
  the 
  palpi 
  are 
  paler 
  ; 
  the 
  base 
  of 
  the 
  mandibles 
  

   closely 
  punctured 
  ; 
  the 
  teeth 
  black. 
  Thorax 
  smooth 
  and 
  

   shining. 
  In 
  the 
  centre 
  of 
  the 
  pronotum 
  above 
  is 
  a 
  large 
  

   curved 
  spine, 
  sharply 
  pointed 
  at 
  the 
  apex, 
  which 
  reaches 
  

   to 
  the 
  top 
  of 
  the 
  occiput 
  ; 
  in 
  front 
  of 
  this 
  tooth 
  the 
  pro- 
  

   notum 
  is 
  expanded 
  ; 
  the 
  expansion 
  widest 
  near 
  the 
  head 
  ; 
  

   the 
  sides 
  slightly 
  curved, 
  distinctly 
  margined 
  ; 
  the 
  point 
  

   curved 
  inwardly 
  towards 
  the 
  middle 
  ; 
  above 
  it 
  is 
  keeled 
  

   down 
  the 
  middle, 
  depressed 
  on 
  either 
  side 
  of 
  this 
  central 
  

   keel. 
  The 
  middle 
  lobe 
  of 
  the 
  mesonotum 
  is 
  largely 
  raised 
  

   and 
  separated 
  from 
  the 
  lateral 
  by 
  wide 
  and 
  deep 
  furrows; 
  

   at 
  its 
  apex 
  in 
  the 
  centre 
  is 
  a 
  stout 
  Y-shaped 
  keel. 
  The 
  

   scutellar 
  keels 
  stout; 
  and 
  there 
  is, 
  between, 
  in 
  the 
  middle, 
  

   a 
  longitudinal 
  one 
  of 
  the 
  same 
  thickness 
  ; 
  on 
  the 
  

   scutellum 
  behind 
  is 
  a 
  central 
  and 
  four 
  lateral 
  stout 
  keels 
  ; 
  

   the 
  post-scutellum 
  raised, 
  smooth, 
  triangular 
  ; 
  in 
  front 
  of 
  

   it 
  are 
  two 
  stout, 
  irregular 
  projections 
  ; 
  at 
  the 
  sides 
  of 
  these 
  

  

  

  