﻿250 
  I'EOCEEDINGS 
  OF 
  THE 
  XATWNAL 
  MUSEUM. 
  

  

  than 
  the 
  proiiotum, 
  attingent, 
  lotimdato-ovate, 
  less 
  than 
  half 
  as 
  long- 
  

   again 
  as 
  broad, 
  apically 
  rounded, 
  brownish 
  fuscous. 
  Fore 
  and 
  middle 
  

   femora 
  somewhat 
  rounded 
  in 
  the 
  male; 
  hind 
  femora 
  ferrugineo 
  fuscous 
  

   or 
  tiavo-fuscous, 
  darkest 
  along 
  the 
  upper 
  half 
  of 
  the 
  outer 
  face, 
  without 
  

   fasciation, 
  the 
  under 
  and 
  inner 
  faces 
  tlavous 
  or 
  pale 
  sanguineous, 
  the 
  

   genicular 
  arc 
  blackish; 
  hind 
  tibiae 
  dark 
  glaucous, 
  the 
  spines 
  i^allid 
  

   in 
  basal, 
  black 
  in 
  apical 
  half, 
  nine 
  to 
  eleven, 
  usually 
  ten, 
  in 
  number 
  

   iu 
  the 
  outer 
  series. 
  Extremity 
  of 
  male 
  abdomen 
  clavate, 
  considerably 
  

   recurved, 
  the 
  supraanal 
  plate 
  hastate 
  with 
  rectangulate 
  apex, 
  the 
  sur- 
  

   face 
  nearly 
  plane, 
  the 
  median 
  sulcus 
  shallow, 
  narrow, 
  and 
  narrowing, 
  

   inclosed 
  between 
  low 
  rounded 
  walls, 
  which 
  unite 
  near 
  the 
  middle 
  of 
  the 
  

   plate; 
  furcula 
  reduced 
  to 
  two 
  slight, 
  approximate, 
  bluut 
  denticulatious, 
  

   overlying 
  the 
  base 
  of 
  the 
  just-mentioned 
  ridges; 
  cerci 
  broad 
  at 
  base, 
  

   tapering 
  rapidly 
  and 
  subequally 
  so 
  as 
  to 
  form 
  long 
  triangular 
  plates, 
  

   faintly 
  incurved, 
  apically 
  faintly 
  decurved 
  and 
  linely 
  acuminate 
  at 
  

   tip, 
  the 
  lower 
  margin 
  faintly 
  concave; 
  subgenital 
  plate 
  small, 
  not 
  much 
  

   longer 
  than 
  broad, 
  very 
  broadly 
  and 
  bluntly 
  subconical, 
  the 
  cone 
  form- 
  

   ing 
  a 
  feeble 
  and 
  blunt 
  apical 
  tubercle, 
  the 
  lateral 
  and 
  aiiical 
  margins 
  

   on 
  the 
  same 
  plane, 
  well 
  rounded, 
  entire. 
  

  

  Length 
  of 
  body, 
  male, 
  14.5 
  mm., 
  female, 
  18 
  mm.; 
  antennae, 
  male, 
  5.6 
  

   mm., 
  female, 
  ^^.^^ 
  mm. 
  ; 
  tegmina, 
  male 
  and 
  female, 
  3.25 
  mm. 
  ; 
  hind 
  femora, 
  

   male, 
  K.l 
  mm., 
  female, 
  10 
  mm. 
  

  

  Two 
  males, 
  1 
  female. 
  Mount 
  Alvarez, 
  San 
  Luis 
  Potosi, 
  Mexico, 
  E. 
  

   Palmer. 
  

  

  This 
  species 
  is 
  the 
  most 
  aberrant 
  of 
  its 
  series. 
  

  

  15. 
  PUER 
  SERIES. 
  

  

  In 
  the 
  species 
  of 
  this 
  small 
  group, 
  the 
  prozona 
  of 
  the 
  male 
  (and 
  

   generally 
  of 
  the 
  female) 
  is 
  longitudinal 
  and 
  nearly 
  twice 
  as 
  long 
  as 
  

   the 
  metazona, 
  with 
  its 
  truncate 
  or 
  feebly 
  produced 
  hind 
  margin; 
  the 
  

   median 
  carina 
  is 
  similar 
  throughout. 
  The 
  interspace 
  between 
  the 
  

   mesosternal 
  lobes 
  in 
  the 
  same 
  sex 
  is 
  slightly 
  or 
  much 
  longer 
  than 
  

   broad. 
  The 
  male 
  antennae 
  are 
  long 
  and 
  (;onsiderably 
  longer 
  propor- 
  

   tionately 
  than 
  those 
  of 
  the 
  female. 
  The 
  tegmina 
  are 
  abbreviate, 
  of 
  

   about 
  the 
  length 
  of 
  the 
  pronotum, 
  obovate 
  and 
  apically 
  rounded. 
  

   The 
  hind 
  tibiae 
  are 
  prevailingly 
  glaucous, 
  the 
  si)ines 
  ten 
  to 
  eleven, 
  

   rarely 
  nine, 
  iu 
  number 
  in 
  the 
  outer 
  series. 
  

  

  The 
  supraanal 
  plate 
  of 
  the 
  male 
  is 
  triangular 
  or 
  hastate, 
  the 
  surface 
  

   subtectate 
  with 
  a 
  deep 
  median 
  sulcus; 
  the 
  furcula 
  is 
  variable 
  in 
  length, 
  

   either 
  reduced 
  to 
  mere 
  denticulatious 
  or 
  developed 
  as 
  parallel 
  spines 
  

   nearly 
  a 
  third 
  as 
  long 
  as 
  the 
  supraanal 
  plate; 
  the 
  cerci 
  are 
  small 
  and 
  

   styliform 
  with 
  slight 
  concavity 
  of 
  the 
  upper 
  margin, 
  acuminate 
  and 
  

   much 
  shorter 
  than 
  the 
  supraanal 
  plate; 
  the 
  subgenital 
  plate 
  varies 
  

   considerably 
  but 
  is 
  rather 
  full, 
  and 
  the 
  apical 
  margin 
  entire. 
  

  

  Two 
  species 
  are 
  known. 
  o)ie 
  very 
  small 
  from 
  Florida, 
  the 
  other 
  rather 
  

   large 
  from 
  Texas, 
  and 
  they 
  are 
  brought 
  together 
  in 
  one 
  group 
  princi- 
  

   pally 
  fiom 
  their 
  simple 
  styliform 
  cerci. 
  

  

  