﻿OKTHOPTERA. 
  319 
  

  

  a 
  little 
  longer 
  and 
  larger, 
  the 
  entire 
  segment 
  being 
  a 
  little 
  larger 
  than 
  

  

  the 
  mesothorax. 
  The 
  coxse 
  are 
  stout 
  and 
  thick; 
  those 
  of 
  the 
  prothorax 
  

  

  spined. 
  

  

  Sternum. 
  

  

  The 
  sternites 
  (PI. 
  XXXI, 
  XXXII) 
  are 
  peculiar 
  in 
  this 
  genus 
  and 
  family. 
  

   The 
  prosternum 
  is 
  very 
  short 
  and 
  broad; 
  the 
  coxae 
  are 
  situated 
  rather 
  

   far 
  apart. 
  The 
  mesosternum 
  is 
  divided 
  into 
  two 
  portions; 
  the 
  anterior 
  

   (praesternite) 
  is 
  divided 
  by 
  a 
  median 
  sinus 
  into 
  two 
  lateral 
  swollen 
  areas^ 
  

   while 
  behind, 
  at 
  the 
  base 
  of 
  each 
  coxa, 
  is 
  a 
  stout, 
  triangular 
  spine. 
  

  

  In 
  the 
  metasternum 
  the 
  anterior 
  sternal 
  portion 
  or 
  prsesternite 
  merely 
  

   forms 
  a 
  transverse, 
  curvilinear 
  ridge, 
  from 
  each 
  side 
  of 
  which 
  arises 
  a 
  

   stouter 
  posterior 
  spine 
  than 
  in 
  the 
  mesosternum. 
  

  

  THE 
  ABDOMEN. 
  

  

  There 
  are 
  ten 
  and 
  perhaps 
  eleven 
  uromeres; 
  nine 
  large 
  square 
  ter- 
  

   gites 
  and 
  a 
  tenth 
  narrower 
  one, 
  the 
  tenth 
  segment 
  bearing 
  the 
  small 
  

   unjointed 
  cercopoda. 
  The 
  supra-anal 
  plate 
  probably 
  represents 
  the 
  

   eleventh 
  tergite, 
  but 
  it 
  is 
  not 
  separated 
  very 
  distinctly 
  by 
  suture 
  from 
  

   the 
  tenth 
  uromere. 
  The 
  pleurites 
  are 
  broad 
  but 
  membranous. 
  There 
  

   are 
  eight 
  pairs 
  of 
  abdominal 
  stigmata, 
  which 
  are 
  situated 
  on 
  the 
  pleurum. 
  

   Of 
  the 
  sternites, 
  the 
  first 
  seven 
  are 
  small 
  and 
  narrow, 
  surrounded 
  by 
  

   membrane; 
  the 
  eighth 
  is 
  large 
  and 
  square. 
  The 
  oviposito| 
  is 
  enormous. 
  

   (The 
  proportion 
  of 
  parts 
  in 
  Phaneroptera 
  is 
  seen 
  in 
  Plates 
  XXXIV- 
  

   XXXYIII.) 
  

  

  Family 
  GRYLLID^. 
  

  

  THE 
  HEAD. 
  

  

  Gryllus 
  neglectm. 
  The 
  head 
  is 
  rounded, 
  fall, 
  vertical 
  in 
  position, 
  

   smooth, 
  with 
  no 
  areas, 
  although 
  the 
  three 
  ocelli 
  are 
  present. 
  The 
  clypeus 
  

   is 
  separated 
  by 
  suture 
  from 
  the 
  epicranium; 
  it 
  is 
  divided 
  into 
  two 
  parts, 
  

   the 
  post-clypeus 
  being 
  short 
  and 
  very 
  broad, 
  and 
  separated 
  on 
  the 
  

   sides 
  by 
  a 
  well-marked 
  suture 
  from 
  the 
  ante-clypeus, 
  which 
  is 
  consid- 
  

   erably 
  shorter 
  and 
  not 
  so 
  wide 
  as 
  the 
  labrum, 
  the 
  latter 
  being 
  one-half 
  

   as 
  long 
  as 
  broad. 
  The 
  genal 
  ridges 
  are 
  remote 
  and 
  posterior 
  to 
  the 
  

   orbits. 
  The 
  gular 
  region 
  is 
  unusually 
  broad; 
  the 
  mentum 
  is 
  much 
  

   shorter 
  and 
  smaller 
  than 
  the 
  submentum. 
  

  

  THE 
  THORAX. 
  

  

  Notum. 
  

  

  Pronotum 
  is 
  broad 
  and 
  flat, 
  square, 
  nearly 
  as 
  long 
  as 
  broad, 
  and 
  bent, 
  

   over 
  the 
  sides, 
  so 
  that 
  the 
  pleurites 
  are 
  very 
  short; 
  posteriorly 
  it 
  over- 
  

   laps 
  the 
  mesonotum. 
  

  

  Mesonotum 
  is 
  very 
  simple 
  in 
  structure. 
  It 
  is 
  very 
  short, 
  being 
  one- 
  

   third 
  as 
  long 
  as 
  the 
  pronotum 
  and 
  also 
  one-third 
  as 
  long 
  as 
  the 
  meta- 
  

   notum 
  ; 
  the 
  scutum 
  is 
  very 
  short, 
  consisting 
  of 
  two 
  lateral 
  raised 
  areas, 
  

   nearly 
  separated 
  by 
  the 
  large, 
  broad, 
  swollen 
  scutellum, 
  the 
  latter 
  

   transversely 
  lozenge-shaped, 
  being 
  rounded 
  in 
  front 
  and 
  a 
  little 
  more 
  

   angular 
  behind. 
  

  

  