﻿222 
  Mr. 
  F. 
  Smith's 
  Monograph 
  

  

  posterior 
  angles 
  have 
  also 
  a 
  longer 
  stout 
  acute 
  spine, 
  the 
  legs 
  black 
  ; 
  

   the 
  head 
  and 
  thorax 
  are 
  both 
  sprinkled 
  with 
  short 
  bright 
  golden 
  

   hairs 
  ; 
  each 
  node 
  of 
  the 
  abdomen 
  has 
  on 
  each 
  side 
  an 
  acute 
  spine. 
  

   Abdomen 
  ovate, 
  eraarginate 
  at 
  the 
  base 
  ; 
  an 
  oblong 
  black 
  stripe 
  

   runs 
  from 
  the 
  apex 
  to 
  the 
  middle 
  of 
  the 
  abdomen; 
  beneath 
  black. 
  

   Hab. 
  Brazil. 
  

  

  This 
  appears 
  to 
  be 
  a 
  rare 
  species 
  ; 
  I 
  have 
  only 
  seen 
  the 
  single 
  

   specimen 
  in 
  ray 
  own 
  Collection. 
  

  

  23. 
  Cryptocerus 
  discocephalus, 
  new 
  sp. 
  (PI. 
  XX. 
  fig. 
  2.) 
  

  

  Neuter. 
  — 
  Length 
  2| 
  lines. 
  Entirely 
  ferruginous, 
  the 
  entire 
  

   margin 
  of 
  the 
  head 
  curving 
  upwards, 
  forming 
  the 
  exact 
  model 
  of 
  

   a 
  dish 
  or 
  bowl, 
  which 
  has 
  a 
  few 
  large 
  scattered 
  punctures 
  within 
  ; 
  

   the 
  posterior 
  angles 
  of 
  the 
  head 
  produced 
  laterally, 
  and 
  bent 
  

   slightly 
  upwards 
  ; 
  the 
  thorax 
  without 
  spines, 
  somewhat 
  oblong- 
  

   quadrate, 
  but 
  narrower 
  posteriorly 
  ; 
  nodes 
  of 
  the 
  abdomen 
  trans- 
  

   verse, 
  acute 
  at 
  their 
  outer 
  angles 
  ; 
  abdomen 
  elongate-ovate, 
  deeply 
  

   emarginate 
  at 
  the 
  base 
  ; 
  legs 
  very 
  short 
  and 
  stout. 
  

  

  Hab. 
  Brazil. 
  

  

  Of 
  this 
  remarkable 
  species 
  I 
  have 
  only 
  seen 
  two 
  specimens, 
  one 
  

   in 
  the 
  Collection 
  at 
  the 
  British 
  Museum, 
  and 
  one 
  in 
  my 
  own. 
  

  

  24. 
  Cri/ptocerus 
  causticus. 
  

   Formica 
  caustica, 
  Pohl 
  and 
  KoUar, 
  Braz. 
  Insect. 
  17. 
  Tab. 
  

  

  fig. 
  12. 
  

   Cryptocerus 
  caustica, 
  Guer. 
  Icon, 
  R. 
  Anim. 
  426. 
  

  

  25. 
  Cryptocerus 
  elegans, 
  new 
  sp. 
  (PI. 
  XIX. 
  fig. 
  3.) 
  

   *Neuter. 
  — 
  Length 
  2| 
  lines. 
  Head, 
  antennae 
  and 
  legs 
  rufo-tes- 
  

   taceous 
  ; 
  margins 
  of 
  the 
  head 
  broadly 
  expanded 
  at 
  the 
  sides, 
  nar- 
  

   rowly 
  so 
  behind, 
  and 
  of 
  a 
  pale 
  testaceous 
  hue 
  ; 
  eyes 
  black 
  ; 
  

   mandibles 
  rufo-testaceous. 
  Thorax 
  elongate, 
  rounded 
  in 
  front, 
  

   its 
  lateral 
  angles 
  produced 
  into 
  spines 
  curving 
  backwards 
  ; 
  the 
  

   metathorax 
  has 
  three 
  teeth 
  on 
  each 
  side 
  ; 
  the 
  shoulders 
  and 
  

   teeth 
  at 
  the 
  sides 
  of 
  the 
  thorax 
  pale 
  testaceous 
  ; 
  the 
  posterior 
  

   femora 
  testaceous, 
  and 
  having 
  a 
  minute 
  tooth 
  above 
  ; 
  the 
  first 
  

   node 
  of 
  the 
  abdomen 
  rounded 
  in 
  front, 
  curving 
  outwardly 
  at 
  the 
  

   sides 
  to 
  half 
  its 
  length, 
  then 
  abruptly 
  curving 
  inwards 
  on 
  each 
  

  

  * 
  Mr. 
  H. 
  W. 
  Bates, 
  in 
  a 
  note 
  on 
  this 
  species, 
  observes 
  : 
  — 
  "This 
  pretty 
  little 
  

   species 
  was 
  found 
  swimming 
  nimbly 
  over 
  the 
  broad 
  leaves 
  of 
  Heticonia: 
  in 
  a 
  

   moist 
  forest. 
  I 
  have 
  not 
  yet 
  detected 
  its 
  male 
  or 
  female, 
  but 
  suppose 
  its 
  nest 
  to 
  

   be 
  made 
  in 
  the 
  hollow 
  branches 
  of 
  trees 
  like 
  the 
  other 
  species." 
  

  

  