﻿274 
  PEOCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.xx. 
  

  

  Ligli 
  and 
  ratlier 
  sharp 
  walls; 
  furcula 
  consisting 
  of 
  a 
  pair 
  of 
  luinnte, 
  dis- 
  

   tant 
  denticulations 
  ; 
  cerci 
  moderately 
  broad 
  and 
  stout 
  at 
  base, 
  gradu- 
  

   ally 
  narrowing 
  to 
  two-tbirds 
  tbe 
  width 
  in 
  the 
  middle, 
  beyond 
  very 
  

   faintly 
  enlarging, 
  the 
  tip 
  rounded 
  but 
  slightly 
  augulate, 
  the 
  whole 
  sub- 
  

   erect, 
  feebly 
  incurved, 
  and 
  only 
  apically 
  strongly 
  compressed, 
  fully 
  as 
  

   long 
  as 
  the 
  supraanal 
  plate; 
  subgenital 
  plate 
  as 
  broad 
  as 
  long 
  by 
  the 
  

   considerable 
  rounded 
  elevation 
  of 
  the 
  apical 
  margin, 
  which 
  has 
  a 
  

   scarcely 
  perceptible 
  thickening, 
  is 
  entire, 
  and, 
  as 
  seen 
  from 
  above, 
  

   regularly 
  and 
  strongly 
  arcuate, 
  with 
  no 
  lateral 
  angles, 
  the 
  base 
  of 
  the 
  

   lateral 
  margins 
  rectangulate, 
  slightly 
  incurved. 
  

  

  Length 
  ofbody, 
  male, 
  17mm.; 
  antennae, 
  10 
  mm.; 
  tegmina, 
  9 
  nmi. 
  ; 
  hind 
  

   femora, 
  10.75 
  mm. 
  

  

  Two 
  males. 
  Crawford 
  County, 
  Iowa, 
  July 
  13-24, 
  J. 
  A. 
  Allen 
  ; 
  explor- 
  

   ations 
  in 
  Dakota 
  under 
  General 
  Sully, 
  S. 
  M. 
  Eothhammer. 
  

  

  This 
  species 
  is 
  very 
  closely 
  related 
  to 
  Ilel.fasciatus, 
  but 
  has 
  an 
  api- 
  

   cally 
  broader, 
  less 
  thickened, 
  and 
  regularly 
  arcuate 
  subgenital 
  plate, 
  

   and 
  slightly 
  different 
  cerci, 
  these 
  being 
  considerably 
  broader 
  at 
  base 
  

   than 
  apically. 
  It 
  is 
  named 
  for 
  my 
  ornithological 
  friend, 
  Mr. 
  J. 
  A. 
  Allen, 
  

   of 
  the 
  American 
  Museum 
  of 
  Natural 
  History, 
  who 
  many 
  years 
  ago 
  

   obtained 
  for 
  me 
  much 
  of 
  the 
  material 
  on 
  which 
  this 
  memoir 
  is 
  based. 
  

  

  8o. 
  MELANOPLUS 
  SNOWII, 
  new 
  species. 
  

  

  (Plate 
  XVIII, 
  fig. 
  7.) 
  

  

  Of 
  medium 
  size, 
  moderately 
  stout, 
  dark 
  brownish 
  fuscous. 
  Head 
  

   not 
  prominent, 
  pallid 
  testaceous 
  more 
  or 
  less 
  begrimed 
  with 
  fuscous, 
  

   above 
  almost 
  wholly 
  fuscous, 
  separated 
  by 
  a 
  pallid 
  testaceous 
  streak 
  

   from 
  the 
  broad 
  piceous 
  i^ostocular 
  band; 
  vertex 
  somewhat 
  tumid, 
  ele- 
  

   vated 
  slightly 
  above 
  the 
  pronotum, 
  the 
  interspace 
  between 
  the 
  eyes 
  

   nearly 
  (male) 
  or 
  fully 
  (female) 
  half 
  as 
  broad 
  again 
  as 
  the 
  first 
  antennal 
  

   joint; 
  fastigium 
  gently 
  declivent, 
  broadly 
  and 
  in 
  the 
  female 
  slightly 
  

   sulcate; 
  frontal 
  costa 
  fading 
  before 
  the 
  clypeus, 
  equal, 
  nearly 
  (male) 
  or 
  

   quite 
  (female) 
  as 
  broad 
  as 
  the 
  interspace 
  between 
  the 
  eyes, 
  feebly 
  sul- 
  

   cate 
  at 
  and 
  briefly 
  below 
  the 
  ocellus, 
  punctate 
  throughout; 
  eyes 
  moder- 
  

   ately 
  large, 
  moderately 
  and 
  in 
  the 
  two 
  sexes 
  equally 
  i)rominent, 
  but 
  

   little 
  longer 
  than 
  the 
  intraocular 
  portion 
  of 
  the 
  genae 
  ; 
  antennae 
  basally 
  

   ferruginous. 
  Pronotum 
  feebly 
  and 
  gradually 
  enlarging 
  from 
  in 
  front 
  

   posteriorly, 
  the 
  disk 
  blackish 
  fuscous 
  with 
  lateral 
  stripes 
  of 
  ijallid 
  testa- 
  

   ceous 
  at 
  least 
  in 
  the 
  male, 
  the 
  lateral 
  lobes 
  testaceous 
  or 
  ferruginous, 
  

   with 
  a 
  very 
  broad 
  jjiceous 
  postocular 
  band 
  confined 
  to 
  the 
  prozona; 
  

   disk 
  considerably 
  convex, 
  passing 
  by 
  a 
  slight 
  shoulder 
  (better 
  marked 
  

   in 
  the 
  female 
  than 
  in 
  the 
  male 
  and 
  forming 
  feeble 
  lateral 
  cariuae) 
  into 
  

   the 
  tumid 
  but 
  inferiorly 
  vertical 
  lateral 
  lobes 
  ; 
  median 
  carina 
  low 
  but 
  

   tolerably 
  distinct, 
  equal, 
  percurrent; 
  front 
  margin 
  truncate, 
  hind 
  mar- 
  

   gin 
  rotundato-obtusangulate; 
  x>rozona 
  longitudinal 
  (male) 
  or 
  quadrate 
  

   (female), 
  nearly 
  a 
  half 
  (male) 
  or 
  about 
  a 
  fourth 
  (female) 
  longer 
  than 
  the 
  

   shallowly 
  but 
  closely 
  punctate 
  metazona. 
  Prosterual 
  spine 
  stout 
  and 
  not 
  

  

  