﻿488 
  REVISION 
  OK 
  THE 
  ELATERIDjE 
  

  

  tion. 
  The 
  lobe 
  of 
  the 
  prosternum 
  is 
  short, 
  and 
  hardly 
  deflexed, 
  and 
  not 
  well 
  defined 
  from 
  

   (he 
  rest 
  of 
  the 
  sternum. 
  This 
  species 
  seems 
  to 
  have 
  been 
  confounded 
  by 
  Dr. 
  Melsheimer 
  

   with 
  the 
  preceding: 
  in 
  fact 
  his 
  description 
  agrees 
  entirely 
  with 
  the 
  preceding, 
  except 
  in 
  

   the 
  description 
  of 
  the 
  spots 
  of 
  the 
  elytra. 
  I 
  have, 
  however, 
  retained 
  Dr. 
  Melshcimer's 
  

   name, 
  as 
  this 
  specimen 
  was 
  placed 
  as 
  the 
  type 
  in 
  his 
  collection. 
  It 
  is 
  quite 
  possibly 
  

   identical 
  with 
  C. 
  4-pustulatus, 
  a 
  European 
  species, 
  and 
  may 
  have 
  become 
  erro- 
  

   neously 
  labelled 
  as 
  American. 
  The 
  state 
  of 
  the 
  specimen, 
  however, 
  is 
  very 
  unsatisfactory. 
  

  

  !>. 
  C- 
  s 
  tri 
  atulus, 
  ater, 
  minus 
  convexus 
  opacus, 
  tenuiter 
  cinereo-pubescens, 
  thorace 
  latitudinc 
  

   non 
  longiorc, 
  antrorsum 
  angustato, 
  lateribus 
  regulariter 
  sat 
  rotundatis, 
  confertissime 
  punctulato, 
  linea 
  

   dorsali 
  lrevi, 
  elytris 
  distinctc 
  striatis, 
  interstitiis 
  planiusculis 
  dense 
  rugose 
  pun'ctulatis, 
  antennis 
  pedi- 
  

   busque 
  piceis, 
  tibiis 
  tarsisque 
  subtestaceis. 
  Long. 
  -14. 
  

  

  Two 
  specimens, 
  Lake 
  Superior. 
  The 
  lobe 
  of 
  the 
  prosternum 
  is 
  short, 
  broad, 
  and 
  well 
  

   defined 
  by 
  a 
  deep 
  transverse 
  impression: 
  the 
  last 
  joint 
  of 
  the 
  palpi 
  is 
  rounded 
  at 
  the 
  ex- 
  

   tremity 
  as 
  in 
  C 
  . 
  p 
  u 
  1 
  c 
  h 
  e 
  1 
  1 
  u 
  s 
  . 
  

  

  10. 
  C. 
  p 
  ec 
  t 
  o 
  r 
  alis, 
  piceus 
  flavo-pubescens, 
  thorace 
  rufescente 
  minus 
  convexo, 
  antice 
  postieeque 
  

   angustato, 
  lateribus 
  rotundato, 
  punctulato, 
  linea 
  dorsali 
  lajvi, 
  elytris 
  vix 
  obsoletissime 
  striatis, 
  confer- 
  

   tim 
  punctulatis, 
  plaga 
  utrinque 
  a 
  medio 
  fere 
  ad 
  basin 
  extensa, 
  altcraque 
  apicali 
  flavo-testaceis, 
  an- 
  

   tennis 
  pedibusque 
  flavis. 
  Long. 
  •12. 
  

  

  Elater 
  pectoralis 
  Say, 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  173. 
  

  

  Middle 
  States 
  and 
  Lake 
  Superior, 
  not 
  rare. 
  The 
  lobe 
  of 
  the 
  sternum 
  is 
  short, 
  broad, 
  

   and 
  tolerably 
  deflexed: 
  the 
  posterior 
  angles 
  of 
  the 
  thorax 
  as 
  in 
  the 
  following 
  species 
  are 
  

   small, 
  but 
  the 
  carina 
  is 
  distinct. 
  Independently 
  of 
  colour, 
  this 
  species 
  differs 
  from 
  the 
  fol- 
  

   lowing 
  by 
  the 
  thorax 
  being 
  much 
  less 
  convex, 
  and 
  by 
  the 
  traces 
  of 
  stria? 
  visible 
  on 
  the 
  

   elytra. 
  When 
  the 
  spots 
  of 
  the 
  elytra 
  are 
  large, 
  the 
  latter 
  appear 
  yellow, 
  with 
  the 
  margin, 
  

   suture 
  and 
  posterior 
  fascia, 
  blackish. 
  Specimens 
  occur 
  in 
  which 
  the 
  thorax 
  is 
  black, 
  and 
  

   the 
  spots 
  of 
  the 
  elytra 
  obsolete. 
  

  

  11. 
  C. 
  obliquatulus, 
  nigro-piceus, 
  punctulatis, 
  cinereo-pubescens, 
  thorace 
  convexo, 
  antice 
  pos- 
  

   tieeque 
  angustato, 
  lateribus 
  magis 
  rotundatis, 
  elytris 
  versus 
  apiceui 
  testaceis, 
  macula 
  utrinque 
  obliqua 
  

   ad 
  medium 
  alba 
  signatis, 
  antennis 
  pedibusque 
  flavis. 
  Long. 
  - 
  10 
  — 
  -11. 
  

  

  Melsheimer, 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  2, 
  214. 
  

  

  Pennsylvania. 
  Messrs. 
  Melsheimer 
  and 
  Zeigler. 
  

  

  12. 
  C. 
  futilis, 
  longiusculus 
  pallide 
  flavo-testaceus, 
  albo-pubescens, 
  capite 
  piceo, 
  thorace 
  quad- 
  

   rate, 
  antice 
  postieeque 
  vix 
  angustato, 
  lateribus 
  late 
  rotundatis, 
  confertim 
  rugose 
  punctulato, 
  linea 
  dor- 
  

   sali 
  lrevi, 
  elytris 
  punctulatis, 
  macula 
  subscutellari, 
  fasciaque 
  pone 
  medium 
  infuscatis. 
  Long. 
  -08. 
  

  

  San 
  Diego, 
  California, 
  in 
  wet 
  sand. 
  This 
  is 
  the 
  smallest 
  species 
  I 
  have 
  seen. 
  The 
  

   thorax 
  is 
  broadly 
  rounded 
  on 
  the 
  sides, 
  and 
  not 
  very 
  convex: 
  the 
  posterior 
  angles 
  are 
  

   very 
  minute, 
  but 
  the 
  carina 
  is 
  distinct: 
  the 
  lobe 
  of 
  the 
  prosternum 
  is 
  short, 
  and 
  defined 
  

   by 
  a 
  transverse 
  impression. 
  

  

  13. 
  C. 
  i 
  n 
  o 
  p 
  s, 
  piceus, 
  cinereo-pubescens, 
  thorace 
  latitudine 
  paulo 
  breviore, 
  convexo, 
  antice 
  postiee- 
  

   que 
  subangustato, 
  lateribus 
  rotundatis, 
  rugose 
  punctulato, 
  linea 
  tenui 
  dorsali 
  land, 
  macula 
  magna 
  dor- 
  

   sali 
  testacea, 
  elytris 
  punctulatis, 
  testaceis 
  macula 
  magna 
  communi 
  scutellari, 
  fascia 
  pone 
  medium, 
  

   suturaque 
  late 
  nigro-piceis, 
  antennis 
  pedibusque 
  flavis. 
  Long. 
  "08 
  — 
  -09. 
  

  

  