﻿OF 
  THE 
  UNITED 
  STATES. 
  439 
  

  

  Abundant 
  at 
  Lake 
  Superior: 
  smaller 
  and 
  more 
  slender 
  than 
  the 
  next 
  species, 
  hardly 
  di- 
  

   lated 
  on 
  the 
  sides: 
  it 
  is 
  easily 
  distinguished 
  by 
  its 
  convex, 
  less 
  rounded 
  and 
  less 
  densely 
  

   punctured 
  thorax. 
  - 
  

  

  11. 
  C. 
  ara 
  t 
  us, 
  crassiusculus, 
  a?neo-niger, 
  tenuiter 
  cinereo-pubescens, 
  thorace 
  latitudine 
  sublon- 
  

   giore, 
  paulo 
  convexo, 
  lateribus 
  antice 
  rotundatis, 
  angulis 
  posticis 
  acutis, 
  productis, 
  rufescentibus, 
  postice 
  

   profunde 
  canaliculato, 
  confertim, 
  lateribus 
  densius 
  punctato, 
  elytris 
  striis 
  tenuibus, 
  punctatis, 
  inter- 
  

   stitiis 
  praecipue 
  planis, 
  disperse 
  punctulatis, 
  pedibus 
  rufis, 
  antennis 
  piceis. 
  Long. 
  '43 
  — 
  "53. 
  

  

  Abundant 
  at 
  Lake 
  Superior: 
  closely 
  resembles 
  in 
  form 
  and 
  characters 
  C. 
  splendcns, 
  but 
  

   is 
  distinctly 
  pubescent, 
  and 
  a 
  little 
  more 
  slender 
  in 
  its 
  general 
  form: 
  the 
  fourth 
  joint, 
  of 
  the 
  

   antennae 
  is 
  not 
  longer 
  than 
  the 
  fifth. 
  

  

  A.— 
  2.— 
  o. 
  

  

  12. 
  C. 
  splendens, 
  crassiusculus 
  cupreo-aeneus, 
  vel 
  brunneo-aeneus, 
  supra 
  vix 
  tenuissimo 
  pubes- 
  

   eens, 
  thorace 
  paulo 
  convexo, 
  latitudine 
  longiore, 
  lateribus 
  antice 
  rotundatis, 
  angulis 
  posticis 
  productis, 
  

   rufescentibus, 
  confertim 
  lateribus 
  confertissime 
  punctato, 
  elytris 
  striis 
  punctulatis, 
  antennis 
  nigiis, 
  

   pedibus 
  prosternique 
  lobo 
  rufis. 
  Long. 
  *4 
  — 
  - 
  52. 
  

  

  Diacanthus 
  splendens 
  Ziegler, 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  2, 
  44. 
  

  

  Pennsylvania, 
  Massachusetts, 
  Lake 
  Superior: 
  it 
  is 
  Elater 
  metallicus 
  of 
  Harris' 
  cata- 
  

   logue. 
  The 
  epipleurce 
  are 
  sometimes 
  tinged 
  with 
  rufous. 
  The 
  specimens 
  from 
  Lake 
  Su- 
  

   perior 
  usually 
  have 
  the 
  thorax 
  more 
  densely 
  punctured, 
  but 
  otherwise 
  do 
  not 
  differ 
  from 
  

   those 
  found 
  nearer 
  the 
  Atlantic. 
  

  

  13. 
  C. 
  aer 
  i 
  p 
  e 
  n 
  n 
  i 
  s, 
  crassiusculus, 
  niger, 
  supra 
  glaberrimus, 
  thorace 
  minus 
  convexo, 
  latitudine 
  

   sublongiore, 
  lateribus 
  late 
  rotundatis, 
  confertim 
  punctato, 
  angulis 
  posticis 
  elongatis, 
  elytris 
  viridi- 
  

   reneis 
  nitidis, 
  striis 
  punctatis, 
  interstitiis 
  minus 
  dense 
  punctulatis. 
  Long. 
  - 
  5 
  — 
  "58. 
  

  

  Aphotistus 
  eeripennis 
  Kirby, 
  Fauna 
  Bor. 
  Am. 
  150, 
  (1837.) 
  

   Elater 
  appropinquans 
  Randall, 
  Bost. 
  Jour. 
  Nat. 
  Hist. 
  2, 
  5, 
  (1838.) 
  

   Diacanthus 
  eeripennis 
  Germ. 
  Zeitschr. 
  4, 
  82. 
  

  

  Very 
  abundant 
  at 
  Lake 
  Superior: 
  found 
  by 
  Randall 
  in 
  Maine. 
  The 
  elytra 
  vary 
  in 
  co- 
  

   lour, 
  being 
  sometimes 
  almost 
  coppery. 
  

  

  14. 
  C. 
  c 
  ar 
  b 
  o, 
  nigerrimus, 
  supra 
  glaber, 
  thorace 
  latitudine 
  longiore, 
  paulo 
  convexo, 
  dense 
  late- 
  

   ribus 
  confertissime 
  punctato, 
  antice 
  angustato 
  et 
  lateribus 
  rotundato, 
  angulis 
  posticis 
  elongatis, 
  elytris 
  

   striis 
  punctatis, 
  interstitiis 
  fere 
  planis, 
  punctulatis. 
  Long. 
  '56. 
  

  

  One 
  specimen 
  from 
  Oregon. 
  Not 
  so 
  broad 
  in 
  its 
  form 
  as 
  C. 
  Eeripennis, 
  but 
  having, 
  like 
  

   that 
  species, 
  the 
  fourth 
  joint 
  of 
  the 
  antenna} 
  conspicuously 
  longer 
  than 
  the 
  fifth: 
  it 
  resem- 
  

   bles 
  very 
  much 
  the 
  next, 
  but 
  the 
  thorax 
  is 
  entirely 
  black, 
  and 
  the 
  dorsal 
  line 
  is 
  very 
  faint, 
  

   and 
  visible 
  only 
  near 
  the 
  base. 
  

  

  15. 
  C. 
  1 
  at 
  e 
  ral 
  is 
  , 
  nigerrimus, 
  supra 
  glaber, 
  thorace 
  latitudine 
  longiore, 
  paulo 
  convexo, 
  dense 
  

   lateribus 
  sanguineis 
  confertissime 
  punctato, 
  antice 
  angustato 
  et 
  lateribus 
  rotundato, 
  angulis 
  posticis 
  

   productis, 
  dorso 
  acute 
  canaliculato, 
  elytris 
  striis 
  vix 
  punctulatis, 
  interstitiis 
  fere 
  planis 
  punctulatis. 
  

   Long. 
  - 
  .j4. 
  

  

  One 
  specimen, 
  Oregon, 
  Col. 
  M'Call. 
  The 
  indexed 
  portion 
  of 
  the 
  thorax, 
  as 
  well 
  as 
  a 
  

   broad 
  lateral 
  margin, 
  is 
  sanguineous: 
  the 
  antennas 
  arc 
  as 
  in 
  the 
  two 
  preceding 
  species. 
  

  

  