﻿NO. 
  1124. 
  BEVISION 
  OF 
  THE 
  MELANOPLI—SCUDDER. 
  391 
  

  

  I 
  kuow 
  of 
  but 
  a 
  single 
  species, 
  which 
  inhabits 
  the 
  Pacific 
  coast 
  from 
  

   Canada 
  to 
  Mexico, 
  and 
  which 
  assumes 
  three 
  forms 
  according- 
  to 
  the 
  

   length 
  of 
  the 
  organs 
  of 
  flight, 
  that 
  with 
  the 
  organs 
  fully 
  developed 
  

   being 
  thus 
  far 
  known 
  only 
  from 
  southern 
  California, 
  from 
  the 
  head 
  of 
  

   the 
  San 
  Joaquin 
  Valley 
  to 
  San 
  Diego. 
  It 
  is 
  distinguished 
  from 
  the 
  

   others 
  not 
  only 
  by 
  the 
  development 
  of 
  these 
  organs, 
  but 
  by 
  a 
  slightly 
  

   slenderer 
  body, 
  the 
  grossness 
  of 
  the 
  others 
  seeming 
  to 
  be 
  correlated 
  

   with 
  their 
  incapacity 
  of 
  flight. 
  

  

  OEDALEONOTUS 
  ENIGMA. 
  

  

  (Plate 
  XXYI, 
  jigs. 
  4-G.) 
  

  

  Melanoplus 
  colJaris 
  ScudderI, 
  Can. 
  Ent., 
  XII 
  (1880), 
  p. 
  75. 
  

   MelanoplnaflaroannuJatus 
  Brtner, 
  Ius. 
  Life, 
  III 
  (1890), 
  p. 
  140. 
  

   Pezotettlx 
  enUima 
  Bruxek, 
  Bull. 
  Div. 
  Ent. 
  U. 
  S. 
  Dep. 
  Agric, 
  XXVIII 
  (1893), 
  

   pp. 
  33-34, 
  fig. 
  17. 
  

  

  OEDALEONOTUS 
  ENIGMA 
  COLLAEIS. 
  

  

  (Plate 
  XXYI, 
  tig. 
  0.) 
  

  

  Melanoplus 
  collaris 
  Scudder!, 
  Proc. 
  Bost. 
  Soc. 
  Xat. 
  Hist., 
  XIX 
  (1878), 
  p. 
  286; 
  

  

  Eut. 
  Notes, 
  VI 
  (1878), 
  p. 
  45.— 
  Bruner, 
  Rep. 
  U. 
  S. 
  Ent. 
  Comm., 
  Ill 
  (1883), 
  p. 
  60. 
  

   Caloptenus 
  Jiavolineatus 
  Bruner 
  (nee 
  Thomas), 
  Bull. 
  Div. 
  Ent. 
  U. 
  S. 
  Dep. 
  Agric, 
  

  

  XXVIII 
  (1893), 
  p. 
  33. 
  

  

  OEDALEONOTUS 
  ENIGMA 
  ENIGMA. 
  

  

  (Plate 
  XXVI, 
  fig. 
  5.) 
  

  

  Pezotetiix 
  enigma 
  Scudder!, 
  Ann. 
  Rep. 
  Chief 
  Eng., 
  1876 
  (1876), 
  p. 
  505; 
  Ann. 
  Rep. 
  

   Geol. 
  Surv. 
  100th 
  Mer., 
  1876 
  (1876), 
  p. 
  285; 
  Proc. 
  Bost. 
  Soc. 
  Nat. 
  Hist., 
  XIX 
  

   (18?8), 
  p. 
  287 
  ; 
  Ent. 
  Notes, 
  VI 
  (1878), 
  p. 
  46.— 
  Bruner, 
  Rep. 
  U. 
  S. 
  Ent. 
  Comm., 
  

   Ill 
  (1883), 
  p. 
  59; 
  Can. 
  Ent., 
  XVII 
  (1885), 
  p. 
  15; 
  Bull. 
  Div. 
  Ent. 
  U. 
  S. 
  Dep. 
  

   Agric, 
  XXVII 
  (1892), 
  p. 
  29. 
  

  

  OEDALEONOTUS 
  ENIGMA 
  JUCUNDUS. 
  

  

  (Plate 
  XXVI, 
  fig. 
  4.) 
  

  

  Pezotettix 
  jucundus 
  Scudder!, 
  Ann. 
  Rep. 
  Chief 
  Eng., 
  1876 
  (1876), 
  p. 
  505; 
  Ann. 
  

   Rep. 
  Geol. 
  Surv. 
  100th 
  Mer., 
  1876 
  (1876), 
  p. 
  285.— 
  Bruner, 
  Rep. 
  U. 
  S. 
  Ent. 
  

   Comm., 
  Ill 
  (1883), 
  p. 
  .59. 
  

  

  Body 
  yellowish 
  testaceous 
  marked 
  with 
  brownish 
  fuscous. 
  Head 
  

   above, 
  behind 
  the 
  uarrowest 
  part 
  of 
  the 
  vertex, 
  marked 
  with 
  an 
  

   elongated, 
  expanding, 
  blackish 
  fuscous 
  stripe, 
  through 
  the 
  middle 
  of 
  

   which 
  runs 
  a 
  yellow 
  line, 
  and 
  by 
  a 
  supraorbital 
  arcuate 
  band 
  of 
  a 
  simi- 
  

   lar 
  color, 
  usually 
  broken, 
  often 
  obsolete, 
  and 
  terminating 
  just 
  below 
  

   a 
  narrow 
  short 
  yellow 
  stripe 
  behind 
  the 
  upper 
  part 
  of 
  the 
  eye; 
  space 
  

   betweeu 
  the 
  eyes 
  rather 
  narrower 
  than 
  the 
  frontal 
  costa, 
  the 
  fastigium 
  

   broadening 
  considerably 
  in 
  front 
  of 
  the 
  eyes 
  and 
  broadly 
  sulcate 
  

   throughout; 
  frontal 
  costa 
  broad 
  and 
  nearly 
  equal, 
  broadest 
  just 
  above 
  

   the 
  ocellus, 
  rather 
  sparsely 
  punctate, 
  and 
  at 
  the 
  ocellus 
  very 
  shallowly 
  

   silicate, 
  often 
  nearly 
  imi)erceptible. 
  Pronotum 
  short 
  and 
  rather 
  stout, 
  

  

  