﻿220 
  Mr. 
  F. 
  Smith's 
  Monograph 
  

  

  the 
  eyes, 
  the 
  margin 
  testaceous, 
  the 
  hinder 
  angles 
  acute; 
  the 
  

   antennae 
  sprinkled 
  with 
  glittering 
  hairs 
  ; 
  the 
  sides 
  of 
  the 
  thorax 
  

   in 
  front 
  testaceous, 
  the 
  anterior 
  portion 
  transverse 
  quadrate, 
  

   behind 
  which 
  the 
  sides 
  are 
  deeply 
  notched, 
  the 
  notch 
  containing 
  

   a 
  curved 
  spine 
  ; 
  the 
  metathorax 
  transverse, 
  its 
  anterior 
  margin 
  

   arched, 
  the 
  lateral 
  and 
  posterior 
  margins 
  curved 
  inwards, 
  the 
  

   posterior 
  angles 
  produced 
  into 
  a 
  sharp 
  spine 
  ; 
  the 
  nodes 
  of 
  the 
  

   abdomen 
  transverse, 
  armed 
  on 
  each 
  side 
  with 
  a 
  sharp 
  spine 
  which 
  

   is 
  bent 
  backwards 
  ; 
  legs 
  four-sided, 
  the 
  section 
  of 
  which 
  is 
  a 
  

   square. 
  Abdomen 
  somewhat 
  heart-shaped, 
  narrowly 
  margined; 
  

   longitudinally 
  and 
  finely 
  rugulose, 
  most 
  strongly 
  so 
  at 
  the 
  base. 
  

  

  Hab. 
  Columbia. 
  

  

  This 
  species 
  is 
  in 
  the 
  Collection 
  of 
  J. 
  O. 
  Westwood, 
  Esq., 
  who 
  

   kindly 
  lent 
  it 
  me 
  for 
  description. 
  

  

  16. 
  Cryptocerus 
  cordatus, 
  new 
  sp. 
  (PI. 
  XXI. 
  fig. 
  3.) 
  

   Worker. 
  — 
  Length 
  3 
  lines. 
  Black, 
  finely 
  punctured, 
  thinly 
  

   covered 
  with 
  glittering 
  silvery 
  scales; 
  the 
  head 
  deeply 
  emarginate 
  

   in 
  front, 
  the 
  sides 
  rounded 
  anteriorly, 
  notched 
  on 
  each 
  side 
  over 
  

   the 
  eyes; 
  the 
  head 
  truncate 
  posteriorly, 
  the 
  lateral 
  angles 
  slightly 
  

   obliquely 
  truncate; 
  — 
  the 
  head 
  rufo-testaceous 
  on 
  each 
  side 
  ante- 
  

   riorly. 
  The 
  thorax 
  rounded 
  in 
  front, 
  produced 
  laterally 
  into 
  a 
  

   flattened 
  margin, 
  the 
  angles 
  of 
  which 
  are 
  acute 
  anteriorly, 
  the 
  

   sides 
  curved 
  and 
  notched 
  posteriorly, 
  forming 
  a 
  small 
  sharp 
  tooth 
  

   on 
  each 
  side, 
  between 
  which 
  is 
  a 
  transverse 
  suture; 
  the 
  posterior 
  

   portion 
  of 
  the 
  thorax 
  is 
  bidentate 
  on 
  each 
  side, 
  the 
  anterior 
  tooth 
  

   being 
  the 
  largest, 
  and 
  curving 
  slightly 
  backwards 
  ; 
  the 
  basal 
  

   margin 
  of 
  this 
  portion 
  of 
  the 
  thorax 
  notched 
  on 
  each 
  side, 
  forming 
  

   a 
  blunt 
  tooth 
  in 
  the 
  centre. 
  The 
  two 
  nodes 
  of 
  the 
  abdomen 
  are 
  

   transverse, 
  the 
  anterior 
  one 
  being 
  the 
  widest; 
  each 
  is 
  produced 
  

   laterally 
  into 
  teeth 
  or 
  spines, 
  which 
  are 
  bent 
  backwards 
  ; 
  the 
  

   abdomen 
  is 
  heart-shaped, 
  slightly 
  margined 
  at 
  the 
  base, 
  the 
  basal 
  

   margins 
  laterally 
  testaceous. 
  

  

  Hab. 
  Santarem, 
  Brazil. 
  

  

  Mr. 
  Bates, 
  in 
  a 
  note 
  on 
  this 
  species, 
  observes, 
  "Swarms 
  of 
  this 
  

   small 
  species, 
  all 
  individuals 
  of 
  the 
  same 
  size, 
  are 
  seen 
  on 
  branches 
  

   and 
  flowers 
  of 
  Byrsominae 
  and 
  other 
  trees 
  on 
  dry 
  sandy 
  campos." 
  

  

  The 
  single 
  specimen 
  sent 
  is 
  unique 
  in 
  the 
  Collection 
  of 
  the 
  

   British 
  Museum. 
  

  

  17. 
  Cryptocerus 
  jnisillus. 
  (PI. 
  XX. 
  fig, 
  8.) 
  

   Black 
  : 
  head 
  dilated 
  before 
  the 
  eyes 
  on 
  each 
  side, 
  the 
  sides 
  

   anteriorly 
  testaceous. 
  

  

  