﻿OF 
  THE 
  UNITED 
  STATES. 
  .]3l 
  

  

  8. 
  L. 
  plebeius, 
  reneo-piceus, 
  minus 
  subtiliter 
  cinereo-pubcscens, 
  clypeo 
  truncato, 
  thorace 
  latitu- 
  

   dine 
  longiore, 
  antrorsum 
  subangustato 
  (minus 
  in 
  femina) 
  lateribus 
  late 
  rotundatis, 
  punctato, 
  angulis 
  

   posticis 
  carinatis 
  brcvibus 
  vix 
  divaricatis, 
  elytris 
  striis 
  punctatis 
  interstitiis 
  sat 
  punctatis, 
  antennarum 
  

   basi 
  pcdibusque 
  piceo-rufis. 
  Long. 
  -34 
  — 
  -37. 
  

  

  Elater 
  plebeius 
  Say, 
  Ann. 
  Lye. 
  1, 
  263. 
  

  

  Limonius 
  metallescens 
  Melsheimer, 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  2, 
  158. 
  

  

  Common 
  in 
  the 
  Middle 
  and 
  Southern 
  States. 
  The 
  base 
  of 
  the 
  antenna) 
  is 
  sometimes 
  

   dark 
  coloured, 
  but 
  never 
  black, 
  as 
  in 
  the 
  preceding 
  species: 
  the 
  second 
  and 
  third 
  joints 
  are 
  

   equal, 
  and 
  together 
  are 
  longer 
  than 
  the 
  fourth 
  : 
  the 
  clypeus 
  is 
  moderately 
  produced, 
  trun- 
  

   cate 
  anteriorly, 
  and 
  even 
  very 
  slightly 
  sinuous. 
  In 
  the 
  females 
  the 
  sides 
  of 
  the 
  thorax 
  

   are 
  more 
  rounded, 
  and 
  the 
  antennae 
  are 
  a 
  little 
  shorter 
  than 
  the 
  thorax. 
  The 
  margin 
  of 
  

   the 
  epipleurce 
  is 
  always 
  rufo-testaceous. 
  

  

  9. 
  L. 
  senescens, 
  fusco-ameus, 
  griseo-pubescens, 
  clypeo 
  truncato, 
  thorace 
  latitudine 
  paulo 
  lon- 
  

   giore, 
  antrorsum 
  subangustato, 
  lateribus 
  omnino 
  rectis, 
  angulis 
  posticis 
  carinatis 
  brevibus 
  divaricatis 
  

   densius 
  punctato, 
  postice 
  subcanaliculato, 
  elytris 
  striis 
  punctatis, 
  interstitiis 
  planis 
  punctatis, 
  pedibus 
  

   rufis. 
  Long. 
  -35. 
  

  

  One 
  specimen, 
  New 
  Jersey, 
  Mr. 
  Guex. 
  Allied 
  to 
  the 
  two 
  preceding 
  species, 
  but 
  suffi- 
  

   ciently 
  distinct 
  by 
  the 
  perfectly 
  straight 
  sides 
  of 
  the 
  thorax: 
  the 
  posterior 
  angles 
  are 
  short, 
  

   and 
  continue 
  the 
  line 
  of 
  the 
  sides; 
  they 
  therefore 
  appear 
  divergent: 
  the 
  antenna? 
  are 
  

   hardly 
  piceous 
  at 
  base; 
  the 
  second 
  and 
  third 
  joints 
  together 
  are 
  longer 
  than 
  the 
  fourth: 
  

   the 
  margin 
  of 
  the 
  epipleurse 
  is 
  testaceous. 
  

  

  10. 
  L. 
  seger, 
  fusco-sencus, 
  griseo-pubescens, 
  clypeo 
  truncato, 
  thorace 
  latitudine 
  longiore 
  antror- 
  

   sum 
  subangustato, 
  lateribus 
  late 
  rotundatis 
  confertim 
  subtilius 
  punctato, 
  angulis 
  posticis 
  vix 
  carinatis 
  

   brevibus 
  subacutis, 
  elytris 
  striis 
  subtiliter 
  punctatis, 
  interstitiis 
  plane 
  discrete 
  punctatis, 
  antennarum 
  

   basi 
  pedibusque 
  rufis. 
  Long. 
  - 
  2G. 
  

  

  One 
  specimen, 
  Lake 
  Superior. 
  In 
  form 
  and 
  structure 
  resembles 
  very 
  much 
  L. 
  p 
  1 
  e 
  - 
  

   beius, 
  but 
  is 
  much 
  smaller: 
  the 
  thorax 
  is 
  more 
  finely 
  and 
  densely 
  punctured: 
  from 
  the 
  

   next 
  it 
  is 
  distinguished 
  by 
  its 
  larger 
  size 
  and 
  more 
  densely 
  punctured 
  thorax, 
  as 
  well 
  as 
  by 
  

   its 
  truncate 
  clypeus: 
  the 
  thorax 
  is 
  scarcely 
  channelled 
  posteriorly. 
  

  

  11. 
  L. 
  que 
  rein 
  us, 
  niger, 
  cinereo-pubcscens, 
  clypeo 
  late 
  emarginato, 
  thorace 
  postice 
  canalicu- 
  

   lar, 
  latitudine 
  longiore, 
  antrorsum 
  subangustato, 
  lateribus 
  paulo 
  rotundatis, 
  minus 
  dense 
  punctato, 
  

   angulis 
  posticis 
  vix 
  carinatis 
  subacutis, 
  elytris 
  striis 
  punctatis, 
  interstitiis 
  discrete 
  punctatis, 
  antenna- 
  

   rum 
  articulis 
  tribus 
  pedibusque 
  rufis. 
  Long. 
  -2— 
  -27. 
  

  

  Dejcan, 
  Cat. 
  103. 
  

  

  Mater 
  quercinus 
  Say, 
  Ann. 
  Lye. 
  1, 
  262. 
  

  

  A 
  very 
  common 
  species 
  in 
  every 
  portion 
  of 
  the 
  United 
  States. 
  From 
  the 
  next 
  it 
  may 
  

   be 
  distinguished 
  by 
  the 
  more 
  acute 
  posterior 
  angles 
  of 
  the 
  thorax, 
  and 
  by 
  the 
  second 
  and 
  

   third 
  joints 
  of 
  the 
  antenna 
  1 
  being 
  longer 
  than 
  the 
  fourth, 
  as 
  in 
  the 
  preceding 
  species: 
  the 
  

   posterior 
  angles 
  of 
  the 
  thorax 
  are 
  sometimes 
  piceous, 
  but 
  never 
  yellow, 
  as 
  in 
  the 
  follow- 
  

   ing 
  species. 
  

  

  A.— 
  8. 
  

  

  12. 
  L. 
  b 
  asil 
  1 
  ar 
  is, 
  niger, 
  tenuiter 
  cinereo-pubcscens, 
  clypeo 
  late 
  emarginato, 
  thorace 
  postice 
  

   canaliculato, 
  latitudine 
  longiore, 
  lateribus 
  fere 
  rectis 
  antice 
  paulo 
  rotundatis, 
  minus 
  dense 
  punctato, 
  

  

  vol. 
  x. 
  — 
  72 
  

  

  