﻿138 
  REVISION 
  OF 
  THE 
  ELATEIUD 
  1 
  

  

  Lake 
  Superior. 
  Ohio, 
  Maine; 
  not 
  rare. 
  The 
  joints 
  of 
  the 
  antennae 
  diminish 
  slightly 
  in 
  

   length 
  From 
  the 
  fourth, 
  but 
  the 
  difference 
  is 
  not 
  so 
  obvious 
  as 
  in 
  many 
  of 
  the 
  following 
  

   species. 
  The 
  black 
  markings 
  of 
  the 
  elytra 
  are 
  connected 
  by 
  their 
  sutural 
  extensions; 
  in 
  

   one 
  specimen 
  the 
  oblique 
  line 
  from 
  the 
  humerus 
  to 
  the 
  suture 
  is 
  wanting, 
  although 
  the 
  

   sutural 
  portion 
  of 
  the 
  spot 
  is 
  as 
  large 
  as 
  in 
  the 
  other 
  specimens. 
  

  

  7. 
  C. 
  furcifer, 
  niger, 
  cinereo-pubescens, 
  thorace 
  latitudine 
  longiore, 
  subtilitcr 
  punctato, 
  lateribus 
  

   late 
  rotundatis, 
  angulis 
  posticis 
  subtcstaccis, 
  elytris 
  luteo-testaceis, 
  macula 
  humerali 
  obliqua 
  per 
  sutu- 
  

   ram 
  extensa, 
  alteraque 
  Iunata 
  pone 
  medium 
  nigris, 
  striis 
  punctatis, 
  interstitiis 
  distincte 
  punctatis, 
  an- 
  

   tennis 
  pedibusque 
  piceis, 
  illis 
  articulo 
  l 
  mo 
  testaceo. 
  Long. 
  "32. 
  

  

  One 
  specimen 
  found 
  at 
  Eagle 
  Harbour, 
  Lake 
  Superior. 
  Marked 
  like 
  the 
  preceding, 
  but 
  

   in 
  size 
  only 
  equal 
  to 
  C. 
  propola, 
  from 
  which 
  it 
  differs 
  by 
  the 
  longer 
  thorax, 
  and 
  more 
  

   deeply 
  striate 
  and 
  more 
  distinctly 
  punctured 
  elytra. 
  In 
  form 
  it 
  is 
  a 
  little 
  less 
  dilated 
  than 
  

   any 
  of 
  the 
  preceding 
  species. 
  

  

  8. 
  C. 
  nubilus, 
  crassiusculus, 
  nigcr, 
  cinereo-pubescens, 
  thorace 
  non 
  transverso, 
  lateribus 
  rotun- 
  

   datis, 
  subtilissime 
  punctulato, 
  angulis 
  posticis 
  testaceis, 
  elytris 
  lurido-testaceis, 
  maculis 
  3 
  pone 
  basin 
  

   (una 
  communi) 
  rotundatis, 
  alteraque 
  utrinque 
  pone 
  medium 
  Iunata, 
  nigricantibus, 
  tenuiter 
  striatis, 
  in- 
  

   terstitiis 
  fere 
  planis 
  punctulatis, 
  antennis 
  pedibusque 
  nigris. 
  Long. 
  - 
  35. 
  

  

  One 
  specimen, 
  collected 
  in 
  California 
  by 
  Mr. 
  Child, 
  and 
  given 
  me 
  by 
  Mr. 
  Rathvon. 
  

   The 
  markings 
  are 
  on 
  the 
  same 
  plan 
  as 
  those 
  of 
  the 
  preceding 
  species, 
  but 
  they 
  are 
  not 
  

   dilated 
  along 
  the 
  suture, 
  and 
  the 
  anterior 
  is 
  broken 
  up 
  so 
  as 
  to 
  form 
  a 
  rounded 
  spot 
  each 
  

   side 
  behind 
  the 
  humerus, 
  and 
  a 
  larger 
  less 
  distinct 
  one 
  at 
  the 
  suture. 
  The 
  finer 
  punctua- 
  

   tion 
  of 
  the 
  thorax, 
  and 
  the 
  black 
  feet, 
  will 
  enable 
  it 
  to 
  be 
  readily 
  recognised. 
  

  

  9. 
  C. 
  in 
  flatus, 
  obesus, 
  tcneo-niger, 
  cinereo-pubescens, 
  fronte 
  plana 
  convexa, 
  thorace 
  convexo, 
  dense 
  

   subtilius 
  punctato, 
  subtransverso, 
  lateribus 
  antice 
  rotundatis, 
  elytris 
  striis 
  punctatis, 
  interstitiis 
  sub- 
  

   convexis, 
  confertim 
  punctulatis, 
  antennis 
  piceis 
  basi 
  rufescentibus, 
  pedibus 
  runs. 
  Long. 
  -33 
  — 
  '45. 
  

  

  Mater 
  inflatus 
  Say, 
  Ann. 
  Lye. 
  1, 
  258; 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  174; 
  Germ. 
  Zeitschr. 
  4, 
  74. 
  

  

  Common 
  in 
  the 
  Southern 
  and 
  Western 
  States; 
  rare 
  in 
  Pennsylvania. 
  The 
  interstices 
  

   of 
  the 
  elytra 
  vary, 
  being 
  sometimes 
  almost 
  flat, 
  and 
  sometimes 
  distinctly 
  convex. 
  This 
  

   species 
  is 
  properly 
  attached 
  to 
  the 
  first 
  division, 
  from 
  the 
  other 
  species 
  of 
  which 
  it 
  differs 
  

   only 
  by 
  the 
  elytra 
  being 
  less 
  broadly 
  margined; 
  the 
  joints 
  of 
  the 
  antennce 
  following 
  the 
  

   fourth 
  are 
  equal; 
  and 
  the 
  fourth 
  is 
  hardly 
  perceptibly 
  longer 
  than 
  the 
  fifth. 
  

  

  10. 
  C. 
  n 
  i 
  t 
  i 
  d 
  u 
  1 
  u 
  s 
  , 
  piceo-ceneus, 
  tenuiter 
  cinereo-pubescens, 
  thorace 
  convexiusculo, 
  latitudine 
  sub- 
  

   longiorc, 
  antrorsum 
  subangustato, 
  lateribus 
  paruni 
  rotundatis, 
  angulis 
  posticis 
  acutis 
  productis, 
  rufes- 
  

   centibus, 
  minus 
  dense 
  subtiliter 
  punctato, 
  postice 
  canaliculato, 
  elytris 
  striis 
  impunctatis, 
  interstitiis 
  

   planis 
  disperse 
  punctulatis, 
  antennis 
  piceis 
  basi 
  pedibusque 
  runs. 
  Long. 
  '35 
  — 
  - 
  4. 
  

  

  Abundant 
  at 
  Lake 
  Superior. 
  Smaller 
  and 
  more 
  slender 
  than 
  the 
  next 
  species; 
  hardly 
  

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

   punctured 
  thorax. 
  

  

  11. 
  C. 
  aratus, 
  crassiusculus, 
  seneb-niger, 
  tenuiter 
  cinereo 
  pubescens, 
  thorace 
  latitudine 
  sublon- 
  

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

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

   terstitiis 
  prsecipue 
  planis, 
  disperse 
  punctulatis, 
  pedibus 
  runs, 
  antennis 
  piceis. 
  Long. 
  - 
  43 
  — 
  -53. 
  

  

  