﻿NEW 
  WASPS 
  FROM 
  SOUTHERN 
  NIGERIA 
  — 
  PATE 
  157 
  

  

  elongate, 
  unicaiinate 
  lengthwise; 
  flagellum 
  generally 
  simple 
  in 
  fe- 
  

   males, 
  but 
  in 
  males 
  with 
  the 
  first 
  three 
  segments 
  apparently 
  ankylosed. 
  

   Clypeus 
  reduced 
  laterally 
  to 
  a 
  mere 
  line, 
  medially 
  with 
  a 
  very 
  short 
  

   lobe 
  which 
  is 
  diversely 
  dentate 
  or 
  excised 
  apically. 
  Maxillary 
  palpi 
  

   with 
  six, 
  labial 
  palpi 
  with 
  three, 
  segments. 
  Mandibles 
  slender, 
  very 
  

   elongate, 
  strongly 
  decussate; 
  apices 
  either 
  simple 
  and 
  acuminate, 
  

   bidentate 
  or 
  truncate 
  ; 
  inner 
  margins 
  dentate 
  or 
  edentate 
  ; 
  lower 
  mar- 
  

   gins 
  entire. 
  Females 
  without 
  a 
  psammophore. 
  

  

  Thorax 
  compact, 
  perfulgid, 
  finely 
  punctate 
  at 
  most. 
  Pronotum 
  

   relatively 
  elongate, 
  transverse, 
  anterior 
  dorsal 
  margin 
  furnished 
  with 
  a 
  

   sharp, 
  transverse 
  carina 
  which 
  descends 
  vertically 
  at 
  the 
  humeri 
  ; 
  the 
  

   dorsal 
  surface 
  with 
  a 
  transverse 
  torus 
  and 
  frequently 
  with 
  a 
  row 
  of 
  

   large 
  foveae. 
  Mesonotum 
  polite, 
  impunctate, 
  though 
  sometimes 
  with 
  

   pits 
  or 
  foveae 
  anteriorly; 
  suture 
  between 
  mesonotum 
  and 
  scutellum 
  

   foveolate; 
  axillae 
  small, 
  lateral 
  margins 
  rounded; 
  scutellum 
  polite; 
  

   postscutellum 
  short, 
  transversely 
  linear, 
  longitudinally 
  striate. 
  Meso- 
  

   pleura 
  more 
  or 
  less 
  horizontally 
  striate, 
  generally 
  impunctate; 
  pre- 
  

   pectus 
  sharply 
  margined 
  anteriorly 
  ; 
  episternal 
  suture, 
  hypersternauli, 
  

   and 
  sternauli 
  present, 
  well 
  developed 
  and 
  strongly 
  foveate, 
  and 
  a 
  ver- 
  

   tical 
  carina 
  before 
  the 
  middle 
  coxae. 
  Metapleura 
  finely 
  sculptured. 
  

   Mesosternum 
  rounded, 
  ecarinate 
  anteriorly. 
  Propodeum 
  f 
  ulgid 
  ; 
  dor- 
  

   sal 
  face 
  with 
  a 
  more 
  or 
  less 
  well 
  defined 
  trigonal 
  enclosure; 
  lateral 
  

   carinae 
  present 
  and 
  well 
  developed 
  along 
  posterior 
  and 
  dorsal 
  faces; 
  

   posterior 
  face 
  with 
  a 
  discal 
  areole. 
  

  

  Forewing 
  with 
  marginal 
  cell 
  narrow 
  and 
  elongate, 
  four 
  times 
  as 
  long 
  

   as 
  wide, 
  truncate 
  at 
  apex 
  and 
  with 
  a 
  small 
  appendiculate 
  cell 
  ; 
  radial 
  

   vein 
  with 
  first 
  abscissa 
  one-half 
  the 
  length 
  of 
  second 
  abscissa 
  ; 
  trans- 
  

   verse 
  cubital 
  vein 
  oblique, 
  inclivous, 
  one-third 
  the 
  length 
  of 
  second 
  

   abscissa 
  of 
  cubitus; 
  cubitus 
  with 
  first 
  abscissa 
  two-thirds 
  the 
  length 
  of 
  

   second 
  abscissa 
  and 
  somewhat 
  angled 
  backward 
  at 
  point 
  of 
  reception 
  

   of 
  recurrent 
  vein. 
  Hind 
  wing 
  with 
  anal 
  lobe 
  distinctly 
  shorter 
  than 
  

   the 
  short 
  submedian 
  cell. 
  

  

  Legs 
  simple 
  or 
  variously 
  modified. 
  Fore 
  trochanters 
  slender, 
  ob- 
  

   terete, 
  about 
  one-half 
  the 
  length 
  of 
  fore 
  femora. 
  Middle 
  tibiae 
  with 
  a 
  

   calcar 
  in 
  both 
  sexes. 
  

  

  Abdomen 
  slender, 
  elongate, 
  clavate 
  ; 
  nitidous, 
  immaculate 
  black, 
  and 
  

   impunctate 
  or 
  at 
  best 
  very 
  finely 
  punctate. 
  First 
  segment 
  elongate, 
  

   petiolif 
  orm 
  and 
  more 
  or 
  less 
  nodose 
  at 
  apex. 
  Tergites 
  with 
  basal 
  aca- 
  

   rid 
  chambers, 
  the 
  ultimate 
  in 
  the 
  females 
  with 
  a 
  fully 
  marginate 
  pygid- 
  

   ial 
  area, 
  which 
  is 
  more 
  or 
  less 
  narrowed 
  and 
  excavate 
  apically, 
  the 
  disc 
  

   shallowly 
  concave, 
  the 
  lateral 
  margins 
  glabrous. 
  Males 
  probably 
  with- 
  

   out 
  a 
  distinct 
  pygidial 
  area. 
  

  

  Remarks. 
  — 
  Although 
  Arnold 
  has 
  recognized 
  the 
  discreteness 
  of 
  the 
  

   present 
  group, 
  he 
  has 
  consistently 
  assigned 
  the 
  component 
  species 
  to 
  the 
  

  

  