﻿454 
  REVISION 
  OF 
  THE 
  ELATERIDjE 
  

  

  Georgia 
  and 
  Texas; 
  South 
  America, 
  according 
  to 
  Gcrmar. 
  The 
  posterior 
  angles 
  of 
  

   the 
  thorax 
  arc 
  long, 
  acute, 
  and 
  carinated; 
  there 
  arc 
  no 
  basal 
  fissures. 
  

  

  2. 
  ('. 
  texanus, 
  obscure 
  castaneus, 
  dense 
  longius 
  helvo-pubescens, 
  thorace 
  confertim 
  punctato, 
  

   antrorsum 
  angustato, 
  latitudine 
  non 
  longiore, 
  lateribus 
  rectis 
  antice 
  rotundatis, 
  elytria 
  fastigiatis, 
  

   muticis, 
  striia 
  punctatis, 
  intcrstitiis 
  confertim 
  punctatis 
  ct 
  rugosis, 
  pedibus 
  rufescentibus. 
  Long. 
  -7. 
  

  

  Two 
  specimens 
  collected 
  by 
  Mr. 
  Schott, 
  of 
  the 
  Mexican 
  Boundary 
  Commission, 
  at 
  

   Eagle 
  Pass, 
  on 
  the 
  lower 
  Rio 
  Grande. 
  Only 
  differs 
  from 
  the 
  preceding 
  by 
  the 
  thorax 
  

   being 
  shorter 
  and 
  distinctly 
  narrowed 
  anteriorly. 
  

  

  Atractopterus 
  Lcc. 
  

  

  Frons 
  modice 
  convcxa, 
  lateribus 
  oblique 
  marginatis, 
  margine 
  fere 
  ad 
  apicem 
  extendentc, 
  fossulis 
  

   antennarum 
  bene 
  definitis 
  distantibus: 
  labrum 
  subemarginatum 
  : 
  mandibulae 
  versus 
  apicem 
  dentatae, 
  

   apicc 
  acutse: 
  antennas 
  serratse, 
  articulo 
  l 
  mo 
  brcviusculo, 
  2 
  ct 
  3 
  subcylindricis, 
  illo 
  breviore, 
  4—10 
  

   triangularibus, 
  ll 
  m0 
  apice 
  subacuminato: 
  palpi 
  articulo 
  ultimo 
  parum 
  dilatato 
  apice 
  rotundato: 
  pros- 
  

   tcrnum 
  antice 
  brevitcr 
  lobatum, 
  mucrone 
  postico 
  vix 
  inflexo, 
  sutura 
  laterali 
  non 
  excavata, 
  oblique 
  

   concava: 
  mesosternum 
  non 
  protuberans: 
  coxse 
  posticre 
  laminis 
  angustis, 
  intus 
  parum 
  dilatatis, 
  dente 
  

   interno 
  minusculo 
  acuto: 
  tarsi 
  sequaliter 
  pubescentes, 
  filiformes, 
  articulo 
  l 
  mo 
  vix 
  longiore, 
  2 
  — 
  4 
  sen- 
  

   sim 
  paulo 
  brevioribus, 
  5 
  t0 
  prsecedentibus 
  3 
  sequali 
  unguiculis 
  maiusculis 
  integris. 
  

  

  Differs 
  from 
  Crigmus 
  by 
  its 
  convex 
  front, 
  and 
  less 
  elongate 
  first 
  tarsal 
  joint; 
  from 
  Lu- 
  

   dius 
  by 
  the 
  narrower, 
  less 
  dilated, 
  and 
  less 
  dentate 
  coxal 
  laminae. 
  The 
  form 
  of 
  body 
  is 
  

   narrow 
  and 
  fusiform, 
  being 
  narrowed 
  each 
  way 
  from 
  the 
  base 
  of 
  the 
  elytra, 
  which 
  are 
  

   acute 
  at 
  the 
  tip; 
  the 
  posterior 
  angles 
  of 
  the 
  thorax 
  arc 
  acute, 
  and 
  carinated; 
  there 
  are 
  

   no 
  basal 
  fissures. 
  

  

  1. 
  A. 
  fusiformis, 
  nigro-viridis, 
  cinereo-pubescens, 
  thorace 
  punctato, 
  latitudine 
  longiore, 
  antror- 
  

   sum 
  angustato, 
  lateribus 
  rectis, 
  angulis 
  posticis 
  elongatis, 
  ssepe 
  testaceis, 
  elytris 
  piceo-testaceis, 
  stri- 
  

   atis, 
  interstitiis 
  paulo 
  convexis 
  sat 
  dense 
  punctatis, 
  apice 
  subacutis, 
  pedibus 
  testaceis, 
  antennarum 
  

   articulo 
  l 
  m0 
  rufo. 
  Long. 
  -55. 
  

  

  Lake 
  Superior, 
  not 
  rare. 
  It 
  is 
  the 
  Prislilophus 
  fusiformis 
  of 
  my 
  catalogue 
  in 
  Agassiz' 
  

   Lake 
  Superior. 
  

  

  2. 
  A. 
  viridanus, 
  ferruginous, 
  supra 
  piceo-seneus, 
  tenuitcr 
  cinereo-pubescens, 
  thorace 
  latitudine 
  

   longiore, 
  subcylindrico, 
  lateribus 
  rectis, 
  ad 
  apicem 
  rotundatis, 
  parcc 
  punctato, 
  margine 
  omni 
  ferrugi- 
  

   neo, 
  pone 
  medium 
  canaliculato, 
  ante 
  medium 
  utrinque 
  fovea 
  profunda 
  impresso, 
  elytris 
  striis 
  punctatis 
  

   vix 
  imprcssis, 
  interstitiis 
  planis, 
  parce 
  punctulatis, 
  antennis 
  nigris 
  basi 
  rufis. 
  Long. 
  -35. 
  

  

  Elater 
  viridanus 
  Say, 
  Ann. 
  Lye. 
  1, 
  250. 
  

  

  Mater 
  sublueens 
  Randall, 
  Bost. 
  Journ. 
  Nat. 
  Hist. 
  2, 
  37. 
  

  

  Pennsylvania, 
  Dr. 
  Melsheimcr. 
  A 
  small 
  species, 
  looking 
  like 
  a 
  Dolopius, 
  and 
  very 
  re- 
  

   markable 
  by 
  the 
  two 
  deep 
  foveoa 
  before 
  the 
  middle 
  of 
  the 
  thorax; 
  the 
  form 
  is 
  less 
  cuneate 
  

   than 
  that 
  of 
  the 
  preceding 
  species; 
  the 
  thorax 
  is 
  almost 
  parallel 
  on 
  the 
  sides, 
  and 
  the 
  

   elytra 
  slightly 
  rounded 
  in 
  their 
  outline. 
  The 
  vertex 
  is 
  marked 
  with 
  a 
  longitudinal 
  fovea, 
  

   as 
  in 
  Dolopius, 
  from 
  which, 
  however, 
  it 
  differs 
  essentially 
  by 
  its 
  less 
  convex 
  front, 
  and 
  

   shorter 
  basal 
  joint 
  of 
  the 
  antenna. 
  

  

  3. 
  A. 
  incongruus, 
  tenuitcr 
  cinereo-pubescens, 
  capite 
  thoraceque 
  olivaceis, 
  opacis, 
  confertim 
  

   punctatis, 
  thorace 
  latitudine 
  longiore, 
  lateribus 
  postice 
  parallelis 
  ante 
  medium 
  late 
  rotundatis, 
  srcpe 
  

  

  