﻿of 
  the 
  Genus 
  Cryptocerus. 
  227 
  

  

  the 
  anterior 
  angles 
  produced 
  into 
  short 
  acute 
  spines, 
  t'le 
  jjosterior 
  

   angles 
  armed 
  with 
  short 
  stout 
  obtuse 
  spines 
  ; 
  anterior 
  wings 
  having 
  

   one 
  elongate 
  marginal 
  cell 
  nearly 
  reaching 
  the 
  apex 
  of 
  the 
  wing, 
  

   and 
  of 
  nearly 
  equal 
  width 
  throughout, 
  truncate 
  at 
  the 
  apex, 
  one 
  

   marginal 
  cell 
  complete, 
  and 
  one 
  discoidal 
  cell 
  ; 
  nodes 
  of 
  the 
  abdo- 
  

   men 
  without 
  spines 
  ; 
  abdomen 
  ovate, 
  pointed 
  at 
  the 
  apex. 
  

  

  Male. 
  — 
  Length 
  5 
  lines. 
  Head 
  and 
  thorax 
  black 
  ; 
  on 
  the 
  sides 
  

   of 
  the 
  head 
  and 
  face 
  a 
  little 
  scattered 
  hoary 
  pubescence, 
  the 
  

   vertex 
  roughly 
  sculptured 
  longitudinally 
  ; 
  the 
  antennse 
  and 
  mouth 
  

   rufo-testaceous, 
  the 
  former 
  as 
  long 
  as 
  the 
  entire 
  insect. 
  Thorax 
  

   above 
  having 
  a 
  few 
  long 
  scattered 
  griseous 
  hairs 
  ; 
  the 
  mesothorax 
  

   has 
  in 
  front 
  a 
  narrow 
  abbreviated 
  smooth 
  oblong 
  space, 
  a 
  similar 
  

   smooth 
  line 
  is 
  also 
  observable 
  parallel 
  with 
  the 
  tegulse 
  ; 
  the 
  post- 
  

   scutellum 
  is 
  pale 
  testaceous, 
  wings 
  sub-hyaline, 
  the 
  nervures 
  thick 
  

   and 
  of 
  a 
  pale 
  testaceous 
  colour, 
  the 
  marginal 
  cell 
  is 
  occupied 
  by 
  

   a 
  fuscous 
  cloud. 
  Legs 
  pale 
  rufo-testaceous; 
  the 
  nodes 
  of 
  the 
  

   abdomen 
  fuscous 
  as 
  well 
  as 
  the 
  sides 
  of 
  the 
  following 
  segment, 
  

   the 
  rest 
  of 
  the 
  abdomen 
  ferruginous. 
  

  

  Hab. 
  Brazil 
  (Santarem). 
  Mr. 
  H. 
  W. 
  Bates. 
  

  

  The 
  male 
  and 
  female 
  in 
  the 
  British 
  Museum, 
  the 
  latter 
  also 
  in 
  

   my 
  own 
  Collection. 
  

  

  The 
  male 
  and 
  female 
  were 
  captured 
  by 
  Mr. 
  Bates, 
  who 
  says 
  : 
  — 
  

   " 
  This 
  species 
  I 
  always 
  find 
  wandering 
  about 
  the 
  trunks 
  of 
  large 
  

   trees, 
  not 
  in 
  numerous 
  bands, 
  following 
  in 
  regular 
  order, 
  but 
  

   only 
  a 
  few 
  scattered 
  individuals, 
  apparently 
  wandering 
  each 
  on 
  

   his 
  own 
  account 
  in 
  pursuit 
  of 
  prey. 
  When 
  observed, 
  they 
  are 
  

   seen 
  to 
  carry 
  their 
  mandibles 
  wide 
  open 
  at 
  right 
  angles 
  to 
  the 
  

   axis 
  of 
  their 
  bodies 
  ; 
  and 
  when 
  a 
  stalk 
  of 
  grass 
  or 
  any 
  other 
  

   article 
  is 
  presented 
  at 
  their 
  heads, 
  they 
  close 
  their 
  jaws 
  with 
  a 
  

   sudden 
  snap. 
  I 
  do 
  not 
  know 
  where 
  or 
  how 
  they 
  construct 
  their 
  

   nests. 
  I 
  have 
  never 
  seen 
  it 
  occupied 
  in 
  any 
  regular 
  industry, 
  or 
  

   associated 
  in 
  great 
  numbers 
  like 
  CEcodoma 
  cephalotes, 
  to 
  which 
  it 
  

   appears 
  to 
  be 
  allied." 
  

  

  Genus 
  4. 
  Orectognathus, 
  new 
  gen. 
  

  

  Head 
  heart-shaped 
  ; 
  eyes 
  prominent, 
  placed 
  forwards 
  on 
  the 
  

   sides 
  of 
  the 
  head 
  ; 
  mandibles 
  elongate, 
  projecting 
  forwards 
  in 
  a 
  

   line 
  with 
  the 
  body 
  ; 
  antennae 
  elongate, 
  inserted 
  near 
  the 
  base 
  of 
  

   the 
  mandibles, 
  5-jointed 
  in 
  the 
  worker. 
  Thorax 
  narrow, 
  a 
  little 
  

   longer 
  than 
  the 
  head 
  ; 
  abdomen 
  attached 
  to 
  the 
  thorax 
  by 
  two 
  

   narrow 
  elongate 
  ovate 
  nodes. 
  

  

  Q 
  2 
  

  

  