﻿292 
  riiOCEEDINGS 
  OF 
  THE 
  SATIOXAL 
  MUSEUM. 
  

  

  The 
  supraaual 
  plate 
  is 
  generally 
  rather 
  simple, 
  triaugular 
  with 
  

   convex 
  sides 
  and 
  a 
  generally 
  produced 
  apex, 
  but 
  is 
  sometimes 
  strongly 
  

   and 
  abruptly 
  compressed 
  apically. 
  The 
  furcula 
  is 
  develo])ed 
  to 
  an 
  

   extreme 
  as 
  a 
  pair 
  of 
  parallel, 
  flattened, 
  pointed 
  plates, 
  usually 
  more 
  

   than 
  half 
  as 
  long 
  as 
  the 
  supraanal 
  plate. 
  The 
  cerci 
  are 
  rather 
  slender 
  

   or 
  only 
  moderately 
  broad, 
  apically 
  spatulate 
  or 
  subspatulate, 
  incurved 
  

   or 
  iubent, 
  of 
  variable 
  length 
  relative 
  to 
  the 
  supraanal 
  plate. 
  The 
  sub- 
  

   genital 
  plate 
  is 
  moderately 
  broad 
  apically, 
  but 
  distinctly 
  narrower 
  

   than 
  long, 
  the 
  apical 
  margin 
  entire 
  and 
  not 
  elevated, 
  or 
  only 
  slightly 
  

   elevated. 
  

  

  The 
  species, 
  six 
  in 
  number, 
  are 
  of 
  medium 
  or 
  slightly 
  above 
  the 
  

   medium 
  size 
  and 
  with 
  the 
  exception 
  of 
  the 
  typical 
  species 
  are 
  found 
  

   only 
  in 
  the 
  extreme 
  Southwestern 
  States 
  — 
  Southern 
  California, 
  Arizona^ 
  

   and 
  Texas, 
  and 
  in 
  Lower 
  California 
  and 
  Sonora, 
  but 
  the 
  typical 
  species 
  

   extends 
  the 
  range 
  on 
  the 
  north 
  to 
  Washington, 
  Idaho, 
  and 
  Wyoming, 
  

   and 
  eastward 
  to 
  Louisiana 
  and 
  westeru 
  Nebraska. 
  It 
  is 
  a 
  western 
  

   type. 
  

  

  86. 
  MELANOPLUS 
  BISPINOSUS, 
  new 
  species. 
  

   (Plate 
  XIX, 
  fig. 
  0.) 
  

  

  Cinereo-fuscous, 
  more 
  or 
  less 
  ferruginous. 
  Head 
  slightly 
  prominent 
  

   in 
  the 
  male 
  only, 
  warm 
  testaceous, 
  infuscated 
  above, 
  with 
  a 
  postocular 
  

   piceous 
  band; 
  vertex 
  gently 
  tumid, 
  raised 
  but 
  slightly 
  above 
  the 
  level 
  

   of 
  the 
  pronotum, 
  the 
  interspace 
  between 
  the 
  eyes 
  rather 
  broad, 
  much 
  

   broader 
  than 
  (male) 
  or 
  fully 
  twice 
  as 
  broad 
  as 
  (female) 
  the 
  tirst 
  anten- 
  

   nal 
  joint; 
  fastigium 
  steeply 
  declivent 
  and 
  plane 
  (female) 
  or 
  broadly 
  

   and 
  shallowly 
  sulcate 
  (male); 
  frontal 
  costa 
  fading 
  next 
  the 
  clypeus, 
  

   a 
  little 
  narrowed 
  above, 
  but 
  otherwise 
  fully 
  as 
  broad 
  as 
  (male) 
  or 
  

   slightly 
  narrower 
  than 
  (female) 
  the 
  interspace 
  between 
  the 
  eyes, 
  feebly 
  

   sulcate 
  at 
  and 
  below 
  the 
  ocellus, 
  biseriately 
  punctate 
  above; 
  eyes 
  rather 
  

   large, 
  somewhat 
  prominent, 
  a 
  little 
  longer 
  than 
  the 
  infraocular 
  portion 
  

   of 
  the 
  genae; 
  antennae 
  ferruginous, 
  apically 
  infuscated, 
  in 
  the 
  male 
  

   more 
  than 
  four-fifths 
  as 
  long 
  as 
  the 
  hind 
  femora. 
  Pronotum 
  subequal, 
  

   but 
  with 
  distinctly 
  flaring 
  metazona, 
  the 
  feebly 
  convex 
  disk 
  passing 
  by 
  

   a 
  broad 
  angle 
  into 
  the 
  subvertical 
  and 
  feebly 
  tumid 
  lateral 
  lobes, 
  leav- 
  

   ing 
  no 
  trace 
  of 
  lateral 
  carinae 
  except 
  slightly 
  on 
  the 
  metazona; 
  lateral 
  

   lobes 
  with 
  a 
  distinct 
  though 
  sometimes 
  broken 
  broad 
  yuceous 
  band 
  

   crossing 
  the 
  ui)per 
  part 
  of 
  the 
  prozoua, 
  broadest 
  on 
  its 
  posterior 
  lobe; 
  

   median 
  carina 
  distinct 
  on 
  the 
  metazona, 
  inconspicuous 
  and 
  blunt 
  

   (male) 
  or 
  subobsolete 
  (female) 
  on 
  the 
  prozoua; 
  front 
  margin 
  truncate, 
  

   hind 
  margin 
  obtusangulate, 
  the 
  angle 
  well 
  rounded; 
  j)rozona 
  quadrate, 
  

   only 
  a 
  little 
  longer 
  than 
  the 
  finely 
  punctate 
  metazona. 
  Prosternal 
  

   spine 
  moderately 
  long, 
  stout, 
  cylindrical, 
  very 
  blunt, 
  erect; 
  intersx)ace 
  

   between 
  mesosternal 
  lobes 
  fully 
  twice 
  as 
  long 
  as 
  broad 
  (male) 
  or 
  sub- 
  

   quadrate 
  (female). 
  Tegmina 
  surpassing 
  the 
  hind 
  femora, 
  of 
  moderate 
  

   width, 
  gently 
  tapering, 
  apically 
  well 
  rounded, 
  fusco-testaceous 
  more 
  or 
  

   less 
  ferruginous 
  basally, 
  flecked 
  somewhat 
  obscurely 
  with 
  fuscous 
  and 
  

  

  