﻿334 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.xx. 
  

  

  tical 
  lateral 
  lobes 
  by 
  a 
  distinct 
  but 
  rounded 
  shoulder, 
  sometimes 
  form- 
  

   ing 
  feeble 
  blunt 
  lateral 
  carinae, 
  especially 
  on 
  the 
  metazona; 
  median 
  

   carina 
  distinct 
  and 
  sharp 
  on 
  the 
  metazona, 
  less 
  distinct 
  and 
  in 
  the 
  

   female 
  sometimes 
  subobsolete 
  on 
  the 
  prozona; 
  front 
  margin 
  truncate, 
  

   hind 
  margin 
  bluntly 
  obtusaugulate; 
  prozona 
  transverse, 
  rarely 
  quad- 
  

   rate 
  or 
  subquadrate, 
  slightly 
  longer 
  in 
  the 
  male 
  than 
  in 
  the 
  female, 
  at 
  

   least 
  a 
  fourth 
  (male) 
  or 
  scarcely 
  (female) 
  longer 
  than 
  the 
  finely 
  but 
  

   obscurely 
  punctate 
  metazona. 
  Prosternal 
  spine 
  short, 
  very 
  blunt 
  con- 
  

   ical, 
  erect 
  or 
  suberect, 
  feebly 
  (male) 
  or 
  strongly 
  (female) 
  appressed; 
  

   interspace 
  between 
  mesosternal 
  lobes 
  fully 
  twice 
  as 
  long 
  as 
  broad 
  

   (male) 
  or 
  quadrate 
  (female). 
  Tegmina 
  reaching, 
  rarely 
  surpassing, 
  the 
  

   tips 
  of 
  the 
  hind 
  femora, 
  of 
  normal 
  width 
  and 
  form, 
  brownish 
  fuscous, 
  

   distinctly 
  but 
  not 
  heavily 
  maculate 
  along 
  the 
  discoidal 
  area, 
  rather 
  

   more 
  distinctly 
  in 
  the 
  female 
  than 
  in 
  the 
  male; 
  wings 
  moderately 
  

   broad, 
  hyaline, 
  the 
  veins 
  pale 
  fuscous, 
  deepening 
  apically 
  and 
  ante- 
  

   riorly. 
  Fore 
  and 
  middle 
  femora 
  very 
  little 
  tumid 
  in 
  the 
  male; 
  hind 
  

   femora 
  of 
  normal 
  length, 
  above 
  and 
  within 
  bimaculate 
  with 
  fuscous, 
  

   which 
  is 
  ordinarily 
  confined 
  in 
  extent, 
  but 
  when 
  extended 
  takes 
  on 
  the 
  

   form 
  of 
  very 
  oblique 
  fasciations, 
  developed 
  more 
  on 
  the 
  inner 
  than 
  on 
  

   the 
  outer 
  face, 
  the 
  latter 
  luteo 
  testaceous 
  more 
  or 
  less 
  infuscated 
  espe- 
  

   cially 
  along 
  the 
  upi^er 
  margin, 
  beneath 
  and 
  on 
  lower 
  half 
  of 
  inner 
  face 
  

   luteous 
  or 
  llavous, 
  the 
  genicular 
  arc 
  fuscous; 
  hind 
  tibiae 
  variable, 
  red, 
  

   yellow, 
  or 
  green, 
  but 
  always 
  i^ale 
  and 
  rather 
  dull 
  in 
  tint, 
  the 
  spines 
  

   black 
  beyond 
  the 
  base, 
  ten 
  to 
  twelve, 
  usually 
  eleven, 
  in 
  number 
  in 
  the 
  

   outer 
  series. 
  Extremity 
  of 
  male 
  abdomen 
  clavate, 
  recurved, 
  the 
  supra- 
  

   anal 
  plate 
  triangular, 
  the 
  apex 
  acutangulate, 
  the 
  surface 
  nearly 
  plane, 
  

   with 
  a 
  shallow 
  median 
  sulcus 
  on 
  the 
  basal 
  three-fourths, 
  formed 
  by 
  

   parallel 
  and 
  at 
  last 
  united, 
  not 
  very 
  high, 
  rounded, 
  bounding 
  ridges; 
  

   furcula 
  consisting 
  of 
  a 
  pair 
  of 
  approximate, 
  feeble, 
  triangular 
  denticu- 
  

   lations 
  overlying 
  these 
  ridges; 
  cerci 
  gently 
  arcuate 
  inward, 
  consisting 
  

   of 
  a 
  stout, 
  tumid, 
  very 
  rapidly 
  narrowing 
  basal 
  portion, 
  a 
  short, 
  sub- 
  

   cylindrical, 
  median 
  stem, 
  and 
  an 
  apical 
  furcation 
  which 
  develops 
  two 
  

   flanges: 
  an 
  upper, 
  inward 
  directed 
  brief 
  finger, 
  hardly 
  longer 
  than 
  

   broad 
  and 
  blunt 
  tipped; 
  and 
  a 
  long, 
  downcurved, 
  tapering, 
  pointed 
  

   apophysis, 
  angulate 
  on 
  its 
  upper 
  margin 
  and 
  reaching 
  far 
  beyond 
  the 
  

   supraanal 
  plate 
  to 
  the 
  base 
  of 
  the 
  apical 
  elevation 
  of 
  the 
  subgenital 
  

   plate; 
  the 
  latter 
  moderately 
  broad 
  and 
  equal 
  excei:>t 
  for 
  the 
  extreme 
  

   and 
  abrupt 
  apical 
  elevation 
  of 
  the 
  margin, 
  forming, 
  as 
  viewed 
  from 
  

   behind, 
  a 
  quadrate 
  truncate 
  plate, 
  mesially 
  appressed, 
  rising 
  above 
  

   the 
  lateral 
  margins 
  of 
  the 
  plate. 
  

  

  Length 
  of 
  body, 
  male, 
  22 
  mm., 
  female, 
  24 
  mm.; 
  antennae, 
  male, 
  7.5 
  

   mm., 
  female, 
  6.25 
  mm. 
  ; 
  tegmina, 
  male 
  and 
  female, 
  16 
  mm.; 
  hind 
  femora, 
  

   male, 
  10.5 
  mm., 
  female, 
  13 
  mm. 
  

  

  Thirteen 
  males, 
  11 
  females. 
  British 
  Columbia, 
  Crotch 
  (Museum 
  

   Comparative 
  Zoology); 
  Fort 
  McLeod, 
  Alberta, 
  August, 
  L. 
  Bruner 
  

  

  