﻿NOTES 
  ON 
  AFRICAN 
  CHALCIDOIDEA. 
  — 
  I. 
  257 
  

  

  Family 
  Chalcididae. 
  

  

  Dr. 
  Lamborn 
  has 
  submitted 
  a 
  species 
  of 
  Chalcis 
  from 
  Southern 
  Nigeria 
  differing 
  

   from 
  any 
  hitherto 
  described 
  from 
  Africa 
  under 
  Chalcis 
  or 
  Oncochalcis. 
  It 
  is 
  abun- 
  

   dantly 
  distinct 
  in 
  colour, 
  in 
  dimensions 
  and 
  markings 
  from 
  C. 
  amenocles, 
  Walker 
  

   (List. 
  Hym. 
  Brit. 
  Mus. 
  Chalcid., 
  i, 
  p. 
  84, 
  1846), 
  and 
  C. 
  visellus, 
  Walker 
  (Ann. 
  Mag. 
  

   Nat. 
  Hist., 
  xvii, 
  p. 
  109, 
  1846), 
  both 
  from 
  Sierra 
  Leone. 
  To 
  C. 
  amphilochus, 
  Walker 
  

   (Ann. 
  Mag. 
  Nat. 
  Hist., 
  xvii, 
  p. 
  109, 
  1846), 
  from 
  the 
  same 
  locality, 
  it 
  somewhat 
  

   approaches 
  in 
  size, 
  but 
  the 
  hind 
  tibiae 
  of 
  amphilochus 
  are 
  apically 
  lighter, 
  the 
  

   scutellum 
  is 
  posteriorly 
  indented, 
  and 
  the 
  first 
  abdominal 
  tergite 
  closely 
  punctate. 
  

  

  Chalcis 
  olethrius, 
  sp. 
  now 
  (fig. 
  5). 
  

  

  A 
  small 
  coarsely 
  punctate 
  species 
  distinguished 
  by 
  the 
  entirely 
  black 
  hind 
  femora, 
  

   the 
  pale 
  tegulae 
  and 
  the 
  rounded 
  posterior 
  margin 
  of 
  the 
  scutellum. 
  

  

  <J. 
  Head. 
  — 
  Vertex 
  and 
  frons 
  coarsely 
  punctate. 
  Antennae 
  inserted 
  below 
  the 
  

   middle 
  of 
  the 
  face, 
  but 
  distinctly 
  above 
  the 
  base 
  of 
  the 
  eye, 
  with 
  13 
  joints, 
  viz. 
  : 
  — 
  

   scape, 
  pedicel, 
  one 
  ring 
  and 
  7 
  cylindrical 
  joints 
  in 
  the 
  funicle, 
  and 
  the 
  club 
  divided 
  

   by 
  a 
  distinct 
  suture 
  at 
  about 
  one-third 
  and 
  by 
  another, 
  indistinct 
  and 
  incomplete, 
  

   near 
  the 
  apex 
  ; 
  all 
  the 
  funicular 
  joints 
  broader 
  than 
  long, 
  the 
  fourth 
  (sixth) 
  longest, 
  

   and 
  the 
  seventh 
  (ninth) 
  shortest 
  ; 
  the 
  first 
  division 
  of 
  the 
  club 
  is 
  two-thirds 
  the 
  

   second. 
  The 
  antennal 
  furrows 
  are 
  separated 
  near 
  the 
  scrobes 
  by 
  a 
  slight 
  median 
  

   keel, 
  but 
  united 
  towards 
  the 
  anterior 
  ocellus 
  which 
  the 
  scape 
  just 
  fails 
  to 
  reach. 
  

   The 
  orbits 
  diverge 
  steadily 
  from 
  the 
  vertex 
  downwards, 
  and 
  at 
  the 
  point 
  where 
  the 
  

   eyes 
  are 
  at 
  their 
  widest 
  the 
  diameter 
  of 
  each 
  is 
  rather 
  less 
  than 
  the 
  width 
  of 
  the 
  frons. 
  

  

  Fig. 
  5. 
  Chalcis 
  olethrius, 
  sp. 
  nov. 
  ; 
  hind 
  leg 
  (tarsus 
  not 
  shown). 
  

  

  Thorax 
  uniformly 
  covered 
  above 
  with 
  thimble-like 
  punctures, 
  each 
  having 
  a 
  

   slight 
  central 
  elevation 
  bearing 
  a 
  bristle 
  ; 
  between 
  the 
  punctures, 
  the 
  surface 
  of 
  the 
  

   thorax 
  is 
  rugose 
  or 
  reticulate. 
  Prothorax, 
  facing 
  the 
  occiput, 
  coarsely 
  punctate, 
  

   save 
  along 
  a 
  broad 
  median 
  line 
  which 
  is 
  merely 
  reticulate. 
  Pronotum 
  posteriorly 
  

   narrowed 
  by 
  the 
  mid 
  lobe 
  of 
  the 
  mesonotum. 
  Mesonotum 
  with 
  distinct 
  parapsidal 
  

   furrows. 
  As 
  a 
  guide 
  to 
  the 
  degree 
  of 
  the 
  puncturation 
  of 
  this 
  region, 
  it 
  may 
  be 
  

   noted 
  that 
  parallel 
  to 
  the 
  anterior 
  edge 
  of 
  the 
  mid 
  lobe 
  there 
  are 
  18-20 
  thimble-like 
  

   depressions, 
  and 
  on 
  the 
  posterior 
  edge 
  6. 
  Tegulae 
  pale 
  whitish 
  yellow. 
  Scutellum 
  

   with 
  the 
  puncturation 
  coarser 
  than 
  on 
  any 
  other 
  region 
  ; 
  lateral 
  and 
  posterior 
  

   bristles 
  longer. 
  

  

  Fore 
  wings, 
  length, 
  2'9 
  mm. 
  ; 
  breadth, 
  1.1 
  mm. 
  

  

  Abdomen. 
  — 
  First 
  segment 
  covering 
  more 
  than 
  half, 
  its 
  surface 
  delicately 
  reticulate, 
  

   at 
  least 
  in 
  the 
  middle, 
  but 
  entirely 
  shining 
  ; 
  second 
  segment 
  with 
  all 
  the 
  dorsal 
  

  

  