﻿ORTHOPTERA. 
  313 
  

  

  mucli 
  developed 
  posteriorly 
  towards 
  the 
  occipital 
  region, 
  being 
  reduced 
  

   to 
  a 
  minimum 
  in 
  front 
  of 
  the 
  antennae. 
  The 
  clyijeus 
  is 
  very 
  short, 
  undi- 
  

   vided, 
  and 
  the 
  labrum 
  is 
  deeply 
  cleft. 
  There 
  is 
  no 
  genal 
  ridge. 
  The 
  

   gula 
  is 
  rather 
  broad. 
  The 
  submentum 
  and 
  men 
  turn 
  are 
  rather 
  small 
  

   and 
  narrow. 
  

  

  THE 
  THORAX. 
  

  

  Notum, 
  

  

  The 
  pronotum 
  (PL 
  XXYIII) 
  is 
  oblong, 
  quadrangular, 
  about 
  twice 
  as 
  

   long 
  as 
  broad. 
  

  

  The 
  mesonotum 
  (PI. 
  XXX) 
  and 
  metanotuni 
  are 
  remarkably 
  long 
  and 
  

   slender, 
  the 
  raesothorax 
  being 
  a 
  little 
  longer 
  than 
  the 
  metathorax, 
  and 
  

   not 
  differentiated, 
  owing 
  to 
  the 
  want 
  of 
  wings. 
  

  

  Fleurum, 
  

  

  The 
  propleurum. 
  (PI. 
  XXIX.) 
  There 
  are 
  three 
  sclerites 
  on 
  the 
  sides 
  — 
  

   minute, 
  short, 
  and 
  rudimentary 
  ; 
  the 
  anterior 
  is 
  the 
  episternum 
  ; 
  the 
  

   middle 
  the 
  epimerum 
  ; 
  and 
  the 
  third 
  and 
  hindermost 
  is 
  the 
  peritreme, 
  

   bearing 
  the 
  first 
  thoracic 
  stigma 
  ; 
  the 
  second 
  pair 
  of 
  stigmata 
  being 
  at 
  

   the 
  end 
  of 
  the 
  mesopleurum. 
  The 
  coxa 
  is 
  large, 
  cylindrical 
  (a 
  vertical 
  

   suture 
  along 
  the 
  outer 
  side 
  shows 
  that 
  it 
  is 
  made 
  up 
  of 
  the 
  coxa 
  and 
  

   trochantine 
  *?). 
  

  

  The 
  mesopleurum 
  (PI. 
  ^XXI) 
  is 
  as 
  in 
  the 
  propleurum, 
  but 
  the 
  epister- 
  

   num, 
  as 
  we 
  are 
  disposed 
  to 
  regard 
  it, 
  is 
  larger 
  and 
  extends 
  along, 
  form- 
  

   ing 
  a 
  long, 
  very 
  narrow 
  lateral 
  strip, 
  reaching 
  to 
  the 
  prothorax. 
  

  

  The 
  metapleurum 
  (PI. 
  XXXI) 
  exactly 
  repeats 
  the 
  form 
  of 
  the 
  mesopleu- 
  

   rum, 
  the 
  episternum 
  in 
  front 
  being 
  somewhat 
  narrower 
  and 
  ending 
  at 
  

   the 
  mesostigma. 
  

  

  Sternum. 
  

  

  The 
  prosternum 
  (PI. 
  XXXI) 
  is 
  subscutellate, 
  rapidly 
  narrowing 
  in 
  

   front 
  of 
  the 
  insertion 
  of 
  the 
  legs. 
  

  

  The 
  mesosternum 
  (PI. 
  XXXII) 
  is 
  very 
  long, 
  with 
  a 
  separate 
  piece 
  which 
  

   we 
  may 
  call 
  the 
  prcesternite, 
  and 
  which 
  is 
  narrow 
  and 
  crescent- 
  shaped. 
  

  

  The 
  metasternum 
  (PI. 
  XXXII) 
  is 
  as 
  in 
  the 
  mesosternum, 
  but 
  the 
  prse- 
  

   sternite 
  is 
  much 
  smaller. 
  

  

  THE 
  ABDOMEN. 
  

  

  There 
  are 
  ten 
  tergites 
  and 
  a 
  rudimentary 
  eleventh. 
  There 
  are 
  nine 
  

   urosternites. 
  The 
  pleurites 
  are 
  more 
  developed 
  in 
  the 
  $ 
  than 
  in 
  the 
  $ 
  . 
  

  

  THE 
  HEAD. 
  

  

  Prisoptis.'"^ 
  (Plate 
  XXXIII, 
  figs. 
  6-9.) 
  The 
  head 
  is 
  as 
  in 
  Diaphero- 
  

   mera 
  ; 
  the 
  epicranium 
  and 
  clypeus 
  are 
  as 
  described 
  under 
  that 
  genus, 
  

   but 
  the 
  labrum 
  is 
  less 
  deeply 
  cleft. 
  

  

  161 
  A 
  common 
  Brazilian 
  species. 
  

  

  