﻿OF 
  THE 
  UNITED 
  STATES. 
  459 
  

  

  beneath, 
  and 
  all 
  belong 
  to 
  Erichson's 
  first 
  division. 
  Their 
  appearance 
  is 
  altogether 
  that 
  

   of 
  Dolopius, 
  except 
  that 
  the 
  elytra 
  arc 
  slightly 
  enneate, 
  and 
  the 
  front 
  is 
  distinctly 
  angulated 
  : 
  

   the 
  angles 
  of 
  the 
  thorax 
  are 
  not 
  carinated, 
  and 
  the 
  basal 
  fissures 
  are 
  long. 
  

  

  1. 
  A. 
  recticollis, 
  piccus, 
  pubescens, 
  thorace 
  latcribus 
  dilutioribus, 
  antice 
  paulo 
  rotundatis, 
  

   minus 
  dense 
  punctato, 
  angulis 
  posticis 
  subdivergentibus, 
  elytris 
  testaceis 
  sutura 
  infuscata, 
  striis 
  pro- 
  

   fundis 
  punctatis, 
  interstitiis 
  parce 
  punctatis, 
  antennis 
  pedibusque 
  rufo-testaceis. 
  Long. 
  -2. 
  

  

  Slater 
  recticollis 
  Say, 
  Journ. 
  Acad. 
  Nat. 
  Sc. 
  3, 
  168: 
  (inseius) 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  184. 
  

   Adrastus 
  pumilus 
  Ericbson, 
  Germ. 
  Zeitschr. 
  3, 
  120. 
  

  

  Middle 
  States, 
  not 
  common. 
  The 
  difference 
  between 
  this 
  and 
  the 
  following, 
  except 
  in 
  

   colour, 
  is 
  not 
  obvious: 
  the 
  sides 
  of 
  the 
  thorax, 
  however, 
  appear 
  to 
  be 
  less 
  suddenly 
  rounded 
  

   in 
  front, 
  and 
  the 
  disc 
  is 
  more 
  convex: 
  the 
  posterior 
  angles 
  appear 
  more 
  elongated 
  and 
  di- 
  

   vergent. 
  

  

  2. 
  A. 
  testa 
  ceus, 
  rufo-testaceus, 
  pubescens, 
  thorace 
  minus 
  dense 
  punctato, 
  lateribus 
  rectis, 
  

   antice 
  breviter 
  paulo 
  rotundatis, 
  angulis 
  posticis 
  non 
  divergentibus, 
  elytris 
  striis 
  profundis 
  punctatis, 
  

   interstitiis 
  parce 
  punctatis. 
  Long. 
  "18. 
  

  

  Melsheimer, 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  2, 
  219. 
  

  

  Pennsylvania 
  and 
  Georgia. 
  The 
  sides 
  of 
  the 
  thorax 
  are 
  entirely 
  straight, 
  except 
  imme- 
  

   diately 
  at 
  the 
  apex, 
  where 
  they 
  arc 
  rounded. 
  

  

  Two 
  specimens 
  from 
  the 
  Southern 
  States 
  agree 
  in 
  form 
  with 
  this 
  species, 
  but 
  are 
  of 
  a 
  

   fuscous 
  colour, 
  with 
  the 
  antennae 
  and 
  feet 
  testaceous; 
  they 
  can 
  scarcely 
  be 
  separated. 
  

  

  To 
  this 
  genus 
  must 
  belong 
  Elater 
  quietus 
  Say, 
  (Trans. 
  Am. 
  1'hil. 
  Soc. 
  6, 
  184:) 
  a 
  black 
  

   species 
  with 
  yellow 
  antennae 
  and 
  feet, 
  and 
  having 
  the 
  apex 
  of 
  the 
  clypeus 
  more 
  obtuse 
  

   than 
  in 
  A. 
  recticollis. 
  It 
  is 
  *2 
  unc. 
  long, 
  and 
  was 
  found 
  in 
  Indiana. 
  

  

  Here, 
  probably, 
  must 
  be 
  placed 
  Elater 
  inquinatus 
  Say, 
  (ibid. 
  175:) 
  but 
  the 
  serration 
  

   of 
  the 
  ungues 
  is 
  not 
  mentioned: 
  vide 
  remarks 
  under 
  Dolopius 
  pauper. 
  

  

  Anchastus 
  Lcc. 
  

   Frons 
  convexa, 
  antice 
  subangulatim 
  marginata: 
  mandibulre 
  breves, 
  basi 
  triangulariter 
  extus 
  dila- 
  

   tatse 
  (sicut 
  in 
  Dolopio 
  :) 
  labrum 
  antice 
  rotundatum: 
  antenna; 
  articulo 
  l 
  mu 
  mediocri, 
  parum 
  serratic, 
  

   articulis 
  2 
  et 
  3, 
  4'° 
  coniunctis 
  non 
  longioribus 
  : 
  presternum 
  lobatum, 
  mucrone 
  postico 
  subinflexo, 
  sutura 
  

   laterali 
  concava, 
  antice 
  excavata: 
  mesosternum 
  non 
  protubcrans: 
  coxa; 
  postica; 
  laminis 
  intus 
  valde 
  

   dilatatis, 
  margine 
  autem 
  postico 
  non 
  emarginato, 
  dente 
  forti 
  interno 
  instructo: 
  tarsi 
  pubescentes, 
  ar- 
  

   ticulo 
  l 
  m 
  ° 
  elongato, 
  sequentibus 
  duobus 
  longiore 
  : 
  3'° 
  subtus 
  longe 
  lobato, 
  4'° 
  parvo, 
  5 
  t0 
  tenui 
  unguiculis 
  

   integris. 
  

  

  From 
  Dicrepidius 
  this 
  genus 
  differs 
  by 
  the 
  second 
  joint 
  of 
  the 
  tarsi 
  being 
  simple; 
  from 
  

   Dicrepidius, 
  Elater, 
  and 
  in 
  fact 
  from 
  all 
  the 
  genera 
  of 
  true 
  Elateridre, 
  described 
  in 
  this 
  

   essay, 
  it 
  differs 
  by 
  the 
  very 
  great 
  dilatation 
  of 
  the 
  coxal 
  plates 
  internally; 
  their 
  posterior 
  

   margin 
  is 
  somewhat 
  oblique, 
  though 
  not 
  sinuate 
  as 
  in 
  Dicrepidius 
  and 
  Elater. 
  The 
  pos- 
  

   terior 
  angles 
  of 
  the 
  thorax 
  are 
  acute, 
  strongly 
  carinate, 
  and 
  not 
  diverging; 
  there 
  are 
  no 
  

   basal 
  fissures. 
  This 
  genus 
  seems 
  related 
  to 
  Physorhinus. 
  

  

  1. 
  A. 
  digit 
  atus, 
  fusco-piceus, 
  elongatus, 
  helvo-pubescens, 
  thorace 
  latitudine 
  longiore, 
  antror- 
  

   sum 
  angustato, 
  lateribus 
  rectis 
  ante 
  medium 
  rotundatis, 
  angulis 
  posticis 
  elongatis, 
  dense 
  punctato. 
  

  

  