﻿of 
  the 
  Genus 
  Cryptocerus. 
  225 
  

  

  A 
  rare 
  species 
  apparently. 
  I 
  have 
  only 
  seen 
  the 
  single 
  speci- 
  

   men 
  in 
  my 
  own 
  Collection. 
  

  

  Genus 
  Cataulacus, 
  new 
  gen. 
  

  

  Sexes 
  three, 
  male, 
  female 
  and 
  neuter, 
  or 
  worker. 
  Female. 
  — 
  

   The 
  sides 
  of 
  the 
  head 
  not 
  expanded, 
  the 
  eyes 
  not 
  concealed. 
  An- 
  

   tennse 
  inserted 
  before 
  the 
  eyes 
  ; 
  in 
  repose, 
  received 
  into 
  an 
  oblique 
  

   groove 
  or 
  channel 
  in 
  the 
  cheek 
  ; 
  scape 
  of 
  the 
  antennae 
  grooved 
  

   beneath 
  for 
  the 
  reception 
  of 
  the 
  basal 
  portion 
  of 
  the 
  flagellum. 
  

   Wings 
  having 
  one 
  marginal 
  and 
  one 
  complete 
  sub-marginal 
  cell, 
  

   the 
  discoidal 
  cells 
  obsolete. 
  Abdomen 
  elongate 
  in 
  the 
  female, 
  

   ovate 
  in 
  the 
  workers 
  or 
  neuters. 
  

  

  Male 
  not 
  known. 
  

  

  1. 
  Cataulacus 
  Taprohance, 
  Westvv. 
  MSS., 
  new 
  sp. 
  (PI. 
  XX. 
  

   fig. 
  10.) 
  

  

  Neuter. 
  — 
  Length 
  2 
  lines. 
  Black 
  : 
  the 
  head 
  and 
  thorax 
  roughly 
  

   longitudinally 
  rugose, 
  the 
  vertex 
  behind, 
  and 
  a 
  small 
  centra! 
  por- 
  

   tion 
  of 
  the 
  thorax, 
  anteriorly 
  transversely 
  rugose 
  ; 
  the 
  antennae 
  

   rufo-testaceous, 
  the 
  scape 
  and 
  extreme 
  apex 
  pale 
  ; 
  sides 
  of 
  the 
  

   head 
  and 
  thorax 
  crenulated, 
  the 
  posterior 
  angles 
  of 
  the 
  latter 
  

   armed 
  with 
  a 
  stout 
  spine 
  ; 
  the 
  tibiae 
  and 
  tarsi 
  rufo-testaceous. 
  

   The 
  nodes 
  of 
  the 
  abdomen 
  coarsely 
  sculptured 
  ; 
  abdomen 
  ovate, 
  

   finely 
  shagreened, 
  and 
  longitudinally 
  and 
  delicately 
  rugose 
  at 
  the 
  

   base 
  and 
  sides, 
  the 
  rugosity 
  consisting 
  of 
  a 
  series 
  of 
  raised 
  striae 
  

   which 
  do 
  not 
  reach 
  the 
  middle 
  of 
  the 
  abdomen 
  excepting 
  at 
  the 
  

   sides. 
  

  

  Hab. 
  Ceylon. 
  

  

  This 
  species 
  is 
  unique 
  in 
  the 
  Collection 
  of 
  the 
  Entomological 
  

   Society, 
  to 
  which 
  it 
  was 
  presented 
  by 
  Mr. 
  G. 
  H. 
  K. 
  Thwaites, 
  

   who 
  captured 
  it 
  in 
  Ceylon. 
  

  

  2. 
  Cataulacus 
  Guineensis, 
  Westw. 
  MSS., 
  new 
  sp. 
  (PI. 
  XX. 
  

  

  fig. 
  5.) 
  

   Neuter. 
  — 
  Length 
  2| 
  lines. 
  Black 
  : 
  head 
  and 
  thorax 
  longitudi- 
  

   nally 
  rugose-striate, 
  most 
  deep 
  and 
  coarse 
  on 
  the 
  thorax 
  ; 
  sides 
  of 
  

   the 
  head 
  crenulate, 
  the 
  scape 
  ferruginous, 
  apical 
  joint 
  of 
  the 
  

   flagellum 
  testaceous, 
  the 
  palpi 
  testaceous. 
  Thorax, 
  the 
  anterior 
  

   portion 
  transverse 
  and 
  inclining 
  downwards 
  towards 
  the 
  head, 
  the 
  

   sides 
  crenulate, 
  the 
  posterior 
  angles 
  acute 
  ; 
  behind 
  the 
  transverse 
  

   portion 
  the 
  thorax 
  becomes 
  much 
  narrower 
  towards 
  the 
  meta- 
  

   thorax, 
  from 
  which 
  it 
  is 
  separated 
  by 
  a 
  transverse 
  deep 
  suture 
  ; 
  

  

  VOL. 
  II. 
  N.S. 
  PART 
  VII. 
  — 
  JAN. 
  1854. 
  Q, 
  

  

  