﻿ORTHOPTERA. 
  311 
  

  

  uium 
  is 
  divided 
  into 
  an 
  occipito-vertical, 
  square 
  area 
  extending 
  from 
  

   the 
  occipital 
  foramen 
  and 
  bending 
  over 
  to 
  the 
  ocelli, 
  with 
  a 
  transverse 
  

   straight 
  suture 
  or 
  impressed 
  line 
  in 
  front 
  extending 
  to 
  the 
  orbits. 
  The 
  

   clypeus 
  is 
  very 
  distinctly 
  divided 
  into 
  a 
  post- 
  and 
  anteclypeus, 
  the 
  

   former 
  wider 
  than 
  the 
  anterior 
  division. 
  The 
  labrum 
  is 
  as 
  long 
  as 
  broad 
  

   and 
  somewhat 
  pointed 
  in 
  front. 
  The 
  gense 
  are 
  broad, 
  with 
  a 
  marked 
  

   genal 
  ridge. 
  No 
  gular 
  region 
  in 
  front 
  of 
  the 
  foramen. 
  There 
  is 
  no 
  sub- 
  

   mentumj 
  the 
  mentum 
  is 
  square, 
  the 
  ligula 
  small 
  and 
  narrow. 
  

  

  THE 
  THORAX. 
  

  

  The 
  thorax, 
  as 
  well 
  as 
  the 
  rest 
  of 
  the 
  body 
  in 
  general, 
  approaches 
  

   that 
  of 
  Blatta, 
  with, 
  of 
  course, 
  important 
  modifications 
  j 
  in 
  some 
  respects 
  

   it 
  approaches 
  the 
  Acrydii. 
  

  

  Notum. 
  

  

  The 
  pro7iotum 
  (PI. 
  XXXIII, 
  figs. 
  1-3) 
  is 
  remarkably 
  long, 
  forming 
  the 
  

   tergal 
  and 
  lateral 
  portions 
  of 
  the 
  area. 
  On 
  the 
  anterior 
  fourth 
  is 
  a 
  

   transverse, 
  impressed 
  line, 
  not, 
  however, 
  quite 
  reaching 
  the 
  sides 
  of 
  the 
  

   notum; 
  this 
  is 
  situated 
  directly 
  over 
  the 
  insertion 
  of 
  the 
  first 
  pair 
  of 
  

  

  Mesonotum. 
  (Fig. 
  4, 
  5.) 
  This 
  is 
  very 
  long, 
  being 
  about 
  twice 
  as 
  long 
  

   as 
  broad; 
  along 
  the 
  middle 
  extends 
  a 
  sclerite 
  from 
  the 
  anterior 
  to 
  the 
  

   posterior 
  margin; 
  it 
  is 
  triangular 
  in 
  front 
  and 
  behind; 
  the 
  anterior 
  end 
  

   we 
  would 
  regard 
  as 
  the 
  prsescutum, 
  and 
  the 
  posterior 
  portion 
  as 
  the 
  

   scutellum, 
  the 
  two 
  uniting 
  on 
  the 
  anterior 
  part 
  of 
  the 
  notum. 
  There 
  is 
  

   no 
  postscutellum 
  developed. 
  (This 
  union 
  of 
  the 
  prsescutum 
  and 
  scutel- 
  

   lum 
  is 
  unique 
  in 
  Phyloptera 
  and 
  Neuroptera, 
  but 
  there 
  is 
  an 
  approach 
  

   to 
  it 
  in 
  Blatta.) 
  

  

  On 
  each 
  side 
  of 
  the 
  front 
  of 
  the 
  notum, 
  and 
  in 
  front 
  of 
  the 
  insertion 
  

   of 
  the 
  wings, 
  is 
  a 
  distinct, 
  triangular 
  sclerite, 
  the 
  nature 
  of 
  which 
  is 
  un- 
  

   certain. 
  

  

  The 
  scutum 
  is 
  separated 
  into 
  two 
  long 
  halves. 
  

  

  Metanotum. 
  (Fig. 
  4, 
  5.) 
  This 
  is 
  a 
  little 
  longer 
  and 
  slightly 
  narrower 
  

   posteriorly 
  than 
  the 
  mesonotum, 
  as 
  the 
  hind 
  wings 
  are 
  nearly 
  twice 
  as 
  

   wide 
  as 
  the 
  anterior 
  pair. 
  

  

  The 
  prsescutum 
  is 
  very 
  distinct, 
  narrow, 
  triangular, 
  truncate 
  at 
  the 
  

   apex. 
  The 
  scutellum 
  is 
  very 
  long 
  and 
  narrow, 
  ending 
  in 
  a 
  long, 
  very 
  

   acute 
  point 
  before 
  reaching 
  the 
  prsescutum; 
  thus 
  the 
  scutum 
  is 
  divided 
  

   into 
  two 
  long 
  halves, 
  connected 
  by 
  a 
  very 
  narrow 
  bridge, 
  situated 
  be- 
  

   tween 
  the 
  prsescutum 
  and 
  scutellum, 
  while 
  the 
  mesoscutum 
  is 
  entirely 
  

   divided. 
  The 
  postscutellum 
  is 
  obsolete. 
  

  

  Fleurum, 
  

  

  Propleurites, 
  (Fig. 
  1-3.) 
  The 
  episternum 
  and 
  epimerum 
  are 
  very 
  

   small, 
  short, 
  rudimentary, 
  and 
  situated 
  on 
  the 
  anterior 
  fourth 
  of 
  the 
  

   prothorax. 
  

  

  