﻿OF 
  THE 
  UNITED 
  STATES. 
  417 
  

  

  4. 
  F. 
  cylindricollis, 
  niger, 
  valde 
  elongatus, 
  tenuissime 
  fusco-pubescens, 
  thorace 
  latitudine 
  lon- 
  

   giore, 
  lateribus 
  parallelis, 
  ante 
  medium 
  paulo 
  angustato 
  et 
  rotundato, 
  sat 
  dense 
  punctato, 
  pone 
  medium 
  

   profunde 
  late 
  exarato, 
  angulis 
  posticis 
  paulo 
  productis, 
  elytris 
  a 
  basi 
  vix 
  angustatis, 
  punctatis, 
  striis 
  

   obsoletis, 
  suturali 
  sola 
  conspicua, 
  antennis 
  articulo 
  3 
  10 
  sequento 
  duplo 
  longiore, 
  versus 
  apicem 
  non 
  at- 
  

   tenuatis. 
  Long. 
  -26 
  — 
  -31. 
  

  

  Lee. 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  6, 
  47. 
  

  

  Eucnemis 
  cylindricollis 
  Say, 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  0, 
  188. 
  

  

  Middle, 
  Southern, 
  and 
  Western 
  States. 
  The 
  proportions 
  of 
  the 
  joints 
  of 
  the 
  antenna? 
  

   are 
  as 
  in 
  the 
  preceding: 
  the 
  legs 
  are 
  black, 
  with 
  the 
  tibiae 
  and 
  tarsi 
  slightly 
  piceous. 
  

   This 
  species 
  very 
  much 
  resembles 
  the 
  next: 
  the 
  stria) 
  of 
  the 
  elytra 
  are, 
  however, 
  obso- 
  

   lete, 
  the 
  sutural 
  one 
  alone 
  being 
  distinct, 
  and 
  the 
  punctures 
  arc 
  more 
  distinct, 
  and 
  less 
  

   confluent. 
  

  

  5. 
  F. 
  striatus, 
  niger, 
  valde 
  elongatus, 
  tenuissime 
  fusco-pubescens, 
  thovace 
  latitudine 
  longiore, 
  

   lateribus 
  postice 
  parallelis, 
  antice 
  paulo 
  rotundatis, 
  confertim 
  subtilius 
  punctato, 
  pone 
  medium 
  late 
  

   exarato, 
  angulis 
  posticis 
  paulo 
  productis, 
  elytris 
  a 
  basi 
  subangustatis, 
  confertim 
  rugose 
  punctatis, 
  

   striis 
  distinctis, 
  interstitiis 
  paulo 
  convexis, 
  pedibus 
  antennisque 
  rufescentibus, 
  his 
  articulo 
  3'° 
  sequente 
  

   duplo 
  longiore, 
  versus 
  apicem 
  non 
  attenuatis. 
  Long. 
  -22 
  — 
  "28. 
  

  

  Lee. 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  6, 
  47. 
  

  

  Middle 
  and 
  Southern 
  States. 
  The 
  feet 
  are 
  sometimes 
  almost 
  rufo-piceous, 
  the 
  antennte 
  

   have 
  also 
  a 
  reddish 
  tinge 
  in 
  one 
  specimen: 
  the 
  joints 
  have 
  the 
  same 
  relative 
  proportions 
  

   as 
  in 
  the 
  two 
  preceding 
  species. 
  

  

  C. 
  Tarsi 
  articulo 
  4 
  t0 
  non 
  lobato; 
  ungues 
  non 
  dentati. 
  

  

  6. 
  F. 
  spretus, 
  elongatus, 
  fusco-niger, 
  pubescens, 
  thorace 
  latitudine 
  fere 
  breviore, 
  antrorsum 
  an- 
  

   gustato, 
  et 
  lateribus 
  rotundato, 
  dense 
  sat 
  grosse 
  punctato, 
  angulis 
  posticis 
  modice 
  productis, 
  elytris 
  

   sat 
  grosse 
  confluenter 
  punctatis, 
  striis 
  tenuibus, 
  interstitiis 
  externis 
  paulo 
  convexis, 
  pedibus 
  antennis- 
  

   que 
  rufis, 
  his 
  versus 
  apicem 
  paulo 
  crassioribus, 
  articulis 
  2-12 
  subrequalibus. 
  Long. 
  - 
  2. 
  

  

  Isarthrus 
  spretus 
  Lee. 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  0, 
  48. 
  

  

  One 
  specimen, 
  Lake 
  Superior: 
  the 
  punctures 
  of 
  the 
  head 
  arc 
  a 
  little 
  smaller 
  than 
  those 
  

   of 
  the 
  thorax; 
  there 
  is 
  a 
  faintly 
  impressed 
  fovea 
  at 
  the 
  vertex, 
  which 
  is 
  perhaps 
  accidental. 
  

  

  Eucnemis 
  Ahrens. 
  

   From 
  Fornax, 
  this 
  genus 
  seems 
  to 
  be 
  essentially 
  distinguished 
  by 
  the 
  plates 
  of 
  the 
  pos- 
  

   terior 
  coxa? 
  being 
  less 
  dilated, 
  and 
  truncate 
  posteriorly, 
  so 
  as 
  to 
  extend 
  no 
  farther 
  at 
  the 
  

   middle 
  than 
  at 
  the 
  internal 
  margin. 
  The 
  antenna) 
  are 
  either 
  serrate 
  or 
  pectinate, 
  but 
  

   never 
  filiform, 
  as 
  in 
  Fornax: 
  the 
  ungues 
  are 
  not 
  dentate, 
  and 
  the 
  fourth 
  joint 
  of 
  the 
  tarsi 
  

   is 
  slightly 
  lobed. 
  The 
  first 
  species, 
  from 
  the 
  bad 
  condition 
  of 
  the 
  specimen 
  in 
  my 
  collec- 
  

   tion, 
  was 
  incorrectly 
  stated 
  by 
  me 
  to 
  have 
  the 
  tarsi 
  not 
  lobed. 
  

  

  1. 
  E. 
  clypeatus, 
  fusco-niger, 
  fusco-pubescens, 
  capite 
  thoraceque 
  confertim 
  punctatis, 
  hoc 
  latitu- 
  

   dine 
  vix 
  breviore, 
  lateribus 
  postice 
  parallelis, 
  ante 
  medium 
  rotundatis, 
  elytris 
  striis 
  vix 
  distinctis, 
  con- 
  

   fluenter 
  punctatis, 
  pedibus 
  antennisque 
  totis 
  rufo-testaceis, 
  his 
  serratis, 
  articulo 
  3'° 
  sequente 
  plus 
  

   sesqui 
  longiore. 
  Long. 
  46 
  — 
  48. 
  

  

  Say, 
  Trans. 
  Ann. 
  Phil. 
  Soc. 
  G, 
  189. 
  

  

  Elater 
  clypeatua 
  Say, 
  Ann. 
  Lye. 
  of 
  New 
  York, 
  1, 
  266, 
  

  

  