﻿RE 
  VIS 
  [OX 
  OF 
  THE 
  MELAXOPLI—SCUDDEn. 
  145 
  

  

  the 
  furcula 
  longer 
  than 
  tlie 
  last 
  dorsal 
  segment, 
  and 
  the 
  lateral 
  margins 
  

   of 
  the 
  subgenital 
  plate 
  slightly 
  elevated 
  apically. 
  

  

  The 
  species, 
  six 
  in 
  number, 
  are 
  evenly 
  divided 
  between 
  macropterous 
  

   and 
  brachypterous 
  forms 
  — 
  and 
  this 
  is 
  the 
  only 
  homogeneous 
  series 
  of 
  

   Melanoplus 
  in 
  which 
  they 
  are 
  so 
  — 
  of 
  small 
  or 
  rather 
  small 
  size, 
  and 
  are 
  

   found 
  only 
  in 
  the 
  district 
  to 
  the 
  west 
  of 
  the 
  Mississippi 
  and 
  mainly 
  in 
  

   the 
  Cordilleran 
  region. 
  They 
  have 
  not 
  been 
  reported 
  north 
  of 
  the 
  

   United 
  States, 
  and 
  a 
  single 
  species 
  has 
  been 
  found 
  to 
  extend 
  south 
  of 
  

   our 
  boundary 
  in 
  northern 
  Mexico; 
  while 
  another 
  species 
  is 
  known 
  only 
  

   from 
  California 
  and 
  is 
  the 
  only 
  one 
  occurring 
  west 
  of 
  the 
  Sierra 
  Nevada, 
  

   (the 
  same 
  species, 
  M. 
  rlleyanns, 
  mentioned 
  above). 
  

  

  4. 
  MELANOPLUS 
  OCCIDENTALIS. 
  

   (Plate 
  X, 
  fig. 
  4.) 
  

  

  Caloptenus 
  occidentalis 
  Thomas!, 
  Auu. 
  Eep. 
  U. 
  S. 
  Geol. 
  Surv. 
  Terr., 
  V 
  (1872), 
  p. 
  453, 
  

   pi. 
  II, 
  tig. 
  2.— 
  Glover, 
  111. 
  N. 
  A. 
  Ent., 
  Orth. 
  (1872), 
  pi. 
  xi, 
  fig. 
  2.— 
  Thomas!, 
  

   Rep.U. 
  S. 
  Geol. 
  Snrv. 
  Terr., 
  Y 
  (1873), 
  p. 
  161;?, 
  Rep. 
  Geol. 
  Geogr. 
  Surv. 
  100th 
  

   mer.,V 
  (1875). 
  p. 
  893;?, 
  Proc. 
  Dav. 
  Acad. 
  So., 
  I 
  (1876), 
  p. 
  261.— 
  Scudder, 
  Bull. 
  

   U.S. 
  Geol. 
  8urv. 
  Terr., 
  II 
  (1876), 
  p. 
  261.— 
  Thomas, 
  ibid., 
  IV 
  (1878), 
  p. 
  484.— 
  

   Bruner, 
  Cau. 
  Ent., 
  IX 
  (1877), 
  p. 
  115.— 
  Thomas. 
  Rep. 
  U. 
  S. 
  Eut. 
  Comm..I 
  

   (1878), 
  p. 
  43.— 
  Bruner, 
  Bull. 
  Div. 
  Eut. 
  U. 
  tt. 
  Dep. 
  Agrie., 
  II 
  (1883), 
  p. 
  9; 
  ibid.. 
  

   Ill 
  (1883), 
  p. 
  60. 
  

  

  Melanoplus 
  rariolosii'^ 
  8cudder!, 
  Proc. 
  Best. 
  Soc. 
  Nat. 
  Hist., 
  XX 
  (1879), 
  pp. 
  67-68; 
  

   Cent. 
  Orth. 
  (1879), 
  pp. 
  56-57.— 
  Bruner. 
  Rep. 
  U. 
  S. 
  Ent. 
  Comm., 
  Ill 
  (1883) 
  

   p. 
  61. 
  

  

  Melanoplus 
  occidenialis 
  Bruner, 
  Publ. 
  Xebr. 
  Acad. 
  So., 
  Ill 
  (1893), 
  p. 
  28. 
  

  

  Of 
  medium 
  or 
  rather 
  small 
  size. 
  Head 
  very 
  slightly 
  elevated, 
  a 
  VTry 
  

   little 
  arched; 
  fastigium 
  rather 
  shallow, 
  particularly 
  iu 
  the 
  female, 
  the 
  

   margins 
  in 
  front 
  of 
  the 
  eyes 
  blunt, 
  gently 
  diverging 
  and 
  then 
  converg- 
  

   ing, 
  but 
  in 
  the 
  female 
  subparallel; 
  interspace 
  between 
  the 
  eyes 
  as 
  

   broad 
  (male) 
  or 
  half 
  as 
  broad 
  again 
  (female) 
  as 
  the 
  first 
  anteunal 
  joint; 
  

   frontal 
  costa 
  more 
  than 
  usually 
  prominent, 
  about 
  as 
  broad 
  as 
  the 
  inter- 
  

   space 
  between 
  the 
  eyes, 
  scarcely 
  contracted 
  above, 
  scarcely 
  enlarged 
  

   at 
  the 
  ocellus, 
  at 
  and 
  below 
  which 
  it 
  is 
  somewhat 
  sulcate; 
  ej^es 
  rather 
  

   prominent, 
  anteriorly 
  truncate; 
  antennae 
  somewhat 
  more 
  (male) 
  or 
  

   slightly 
  less 
  (female) 
  than 
  three-fourths 
  as 
  long 
  as 
  the 
  hind 
  femora. 
  

   Pronotum 
  enlarging 
  on 
  the 
  metazona, 
  laterally 
  subtumid 
  in 
  an 
  irregu- 
  

   lar 
  way 
  on 
  the 
  prozona, 
  the 
  metazona 
  faintly 
  i^unctate; 
  front 
  margin 
  

   feebly 
  convex, 
  with 
  a 
  feeble 
  median 
  emarginatiou 
  ; 
  hind 
  margin 
  roundly 
  

   obtusaiigulate; 
  median 
  carina 
  distinct 
  on 
  the 
  metazona, 
  faint 
  on 
  the 
  

   ])rozona, 
  obsolete 
  between 
  the 
  sulci; 
  sides 
  of 
  the 
  pronotum 
  hardly 
  

   shouldered 
  or 
  with 
  very 
  rounded 
  shoulders; 
  transverse 
  sulci 
  of 
  pro- 
  

   zona 
  pretty 
  distinct 
  and 
  continuous; 
  i^rozona 
  longitudinal, 
  a 
  little 
  

   longer 
  than 
  the 
  metazona 
  (male) 
  or 
  transverse, 
  no 
  longer 
  than 
  the 
  

   metazona 
  (female). 
  Prosternal 
  spine 
  rather 
  short, 
  appressed 
  conical, 
  

   broadly 
  rounded 
  at 
  tip, 
  a 
  little 
  retrorse; 
  interspace 
  between 
  mesoster- 
  

   nal 
  lobes 
  about 
  half 
  as 
  long 
  again 
  ius 
  broad 
  (male) 
  or 
  transverse 
  (female). 
  

   Proc. 
  N. 
  M. 
  vol. 
  XX 
  10 
  

  

  