﻿436 
  REVISION 
  OF 
  THE 
  ELATEKIIH 
  

  

  Melanactes 
  of 
  the 
  present 
  essay) 
  must 
  receive 
  a 
  distinct 
  name, 
  as 
  the 
  definitions 
  both 
  of 
  

   Germar 
  and 
  Latreille 
  absolutely 
  exclude 
  it, 
  while 
  the 
  second 
  division 
  must 
  be 
  united 
  with 
  

   the 
  present 
  genus. 
  

  

  Our 
  species 
  may 
  be 
  grouped 
  as 
  follows: 
  

  

  A. 
  Tarsi 
  sitbtus 
  sequaliter 
  pubescentes. 
  

  

  1. 
  Antennse 
  subserrata-, 
  articulo 
  3 
  io 
  cylindrico, 
  sequentibus 
  triangularibus, 
  requalibus 
  : 
  

  

  frons 
  subconvcxa 
  ; 
  corpus 
  dilatatum, 
  pubescens, 
  clytris 
  priecipue 
  testaceis 
  - 
  Sp. 
  1 
  — 
  11. 
  

  

  2. 
  Antenna 
  subserrata, 
  articulo 
  3 
  i0 
  cylindrico, 
  4 
  to 
  sequentibus 
  longiorc 
  ; 
  

  

  «. 
  Corpus 
  dilatatum 
  supra 
  pracipue 
  glabrum, 
  frons 
  planiuscula 
  - 
  - 
  Sp. 
  12 
  — 
  17. 
  

  

  P. 
  Corpus 
  valde 
  dilatatum 
  pubescens, 
  frons 
  valde 
  concava 
  - 
  - 
  - 
  Sp. 
  18. 
  

  

  v. 
  Corpus 
  lincare, 
  supra 
  glabrum, 
  antennis 
  articulis 
  2 
  et 
  3 
  singulis 
  4 
  10 
  vix 
  

  

  minoribus 
  -------- 
  Sp. 
  U 
  -0. 
  

  

  3. 
  Antenna 
  serratse, 
  articulo 
  3 
  io 
  cylindrico, 
  sequentibus 
  triangularibus, 
  sequalibus, 
  

  

  ll 
  m0 
  sub-constricto 
  ; 
  corpus 
  lineare, 
  glabrum 
  vel 
  pubescens 
  - 
  - 
  - 
  Sp. 
  21 
  — 
  24. 
  

  

  4. 
  Antenna 
  serratse, 
  articulo 
  3 
  io 
  dilatato; 
  4 
  — 
  10 
  sequalibus, 
  ll 
  m0 
  constrictor 
  frons 
  

  

  plana: 
  corpus 
  lincare 
  parallelum 
  ._..-- 
  Sp. 
  25. 
  

  

  5. 
  Antenna 
  serratse, 
  articulo 
  3 
  io 
  vario, 
  4 
  — 
  10 
  sequalibus, 
  ll 
  rao 
  constricto; 
  frons 
  con- 
  

  

  cava, 
  corpus 
  subparallelum 
  ----- 
  - 
  - 
  Sp. 
  26 
  — 
  31. 
  

  

  6. 
  Antenna 
  serratse, 
  articulo 
  3 
  io 
  triangulari, 
  prsecipue 
  4 
  t0 
  sequali, 
  4 
  — 
  10 
  sequalibus, 
  

  

  11'"° 
  prsecipue 
  non 
  constricto; 
  frons 
  subconvcxa 
  vel 
  plana: 
  corpus 
  non 
  dilatatum. 
  

   * 
  Elytra 
  posticc 
  rotundatim 
  attenuata: 
  

  

  <*. 
  Thorax 
  angulis 
  posticis 
  carinatis 
  ----- 
  Sp. 
  32 
  — 
  '■)■>. 
  

  

  /3. 
  Thorax 
  angulis 
  posticis 
  non 
  carinatis 
  - 
  Sp. 
  36 
  — 
  37. 
  

  

  ** 
  Elytra 
  postico 
  oblique 
  attenuata, 
  fortius 
  marginata 
  ... 
  Sp. 
  38 
  — 
  41. 
  

  

  7. 
  Antenna 
  compressse, 
  vix 
  serratse, 
  articulo 
  3 
  io 
  scquenti 
  aquali, 
  ll 
  mo 
  vix 
  constricto: 
  

  

  frons 
  concava, 
  corpus 
  prsecipue 
  lineare 
  - 
  Sp. 
  42 
  — 
  45. 
  

  

  B. 
  Tarsi, 
  articulis 
  2 
  — 
  4 
  sublus 
  ad 
  apicem 
  sericeo-spongiosi 
  ... 
  Sp. 
  46 
  — 
  49. 
  

  

  A.— 
  1. 
  

  

  1. 
  C. 
  hamatus, 
  crassiusculus, 
  capite 
  thoraceque 
  atris 
  dense 
  subtilius 
  punctatis, 
  aureo-pilosis, 
  hoc 
  

   postice 
  canaliculato 
  lateribus 
  rotundatis, 
  angulis 
  posticis 
  subdivergentibus, 
  margineque 
  testaceis, 
  ely- 
  

   tris 
  testaceis, 
  macula 
  laterali 
  transversa 
  margineque 
  pone 
  medium 
  fuscis, 
  striis 
  profundis 
  punctatis, 
  

   interstitiis 
  punctatis, 
  abdomine 
  rufo, 
  pectore 
  nigro, 
  pedibus 
  antennisque 
  testaceis. 
  Long. 
  -43. 
  

  

  Elater 
  hamatus 
  Say, 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  170. 
  

  

  New 
  Jersey, 
  Mr. 
  Guex, 
  one 
  specimen. 
  A 
  very 
  peculiar 
  and 
  well 
  marked 
  species, 
  

   having 
  the 
  form 
  of 
  C. 
  hieroglyphicus, 
  but 
  very 
  distinct 
  by 
  its 
  characters. 
  The 
  third 
  joint 
  

   of 
  the 
  antennas 
  is 
  not 
  perceptibly 
  larger 
  than 
  the 
  second; 
  the 
  front 
  is 
  more 
  elevated 
  than 
  

   usual, 
  and 
  almost 
  angulated 
  at 
  tip, 
  the 
  lateral 
  margins 
  converging 
  so 
  as 
  almost 
  to 
  meet; 
  

   the 
  palpi 
  are 
  black. 
  The 
  dense 
  golden 
  yellow 
  hair 
  of 
  the 
  thorax 
  conceals 
  the 
  punctures, 
  

   which 
  are 
  dense, 
  but 
  not 
  coarse; 
  the 
  lateral 
  margin, 
  posterior 
  angles, 
  and 
  indexed 
  portion 
  

   are 
  rufo-testaceous 
  ; 
  the 
  dorsal 
  channel 
  is 
  distinct 
  posteriorly. 
  The 
  stria? 
  of 
  the 
  elytra 
  

   are 
  strongly 
  impressed, 
  the 
  interstices 
  convex 
  and 
  densely 
  punctured. 
  

  

  