﻿OF 
  THE 
  UNITED 
  STATES. 
  457 
  

  

  scure 
  sanguineis, 
  elytris 
  striis 
  subtilius 
  punctatis, 
  interstitiis 
  confcrtim 
  rugose 
  punctulatis. 
  Long. 
  

   •43— 
  -55. 
  

  

  Lake 
  Superior 
  and 
  Vermont. 
  The 
  antennae 
  and 
  legs 
  are 
  black, 
  with 
  a 
  faint 
  pitchy 
  lus- 
  

   tre: 
  the 
  sanguineous 
  colour 
  of 
  the 
  sides 
  of 
  the 
  thorax 
  is 
  sometimes 
  almost 
  wanting; 
  at 
  

   other 
  times 
  it 
  is 
  quite 
  bright, 
  and 
  extends 
  upon 
  the 
  indexed 
  portion, 
  and 
  even 
  to 
  the 
  anterior 
  

   margin 
  of 
  the 
  presternum. 
  

  

  6. 
  D. 
  pubescens, 
  ater, 
  subnitidus, 
  pubescens, 
  thoracc 
  latitudine 
  vix 
  longiore, 
  postice 
  canalicu- 
  

   late, 
  lateribus 
  postice 
  parallelis 
  antice 
  rotundatis, 
  sat 
  dense 
  punctato, 
  elytris 
  striis 
  subtiliter 
  punctatis, 
  

   interstitiis 
  confertim 
  rugose 
  punctulatis, 
  antennarum 
  basi 
  pedibusque 
  fusco-testaceis. 
  Long. 
  - 
  36. 
  

  

  Agriotes 
  pubescens 
  Melsheiiuer, 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  2, 
  217. 
  

  

  Pennsylvania 
  and 
  Lake 
  Superior. 
  Smaller 
  and 
  more 
  robust 
  than 
  the 
  preceding, 
  and 
  

   with 
  the 
  punctures 
  of 
  the 
  thorax 
  less 
  dense: 
  differs 
  from 
  D. 
  avulsus 
  by 
  its 
  larger 
  size, 
  

   shorter 
  and 
  more 
  densely 
  punctured 
  thorax, 
  and 
  by 
  its 
  much 
  less 
  lustrous 
  surface. 
  The 
  

   antennas 
  in 
  one 
  specimen 
  are 
  fuscous, 
  in 
  the 
  other 
  black, 
  with 
  the 
  basal 
  joints 
  testaceous. 
  

  

  7. 
  D. 
  avulsus, 
  niger, 
  nitidus, 
  minus 
  dense 
  hclvo-pubescens, 
  thorace 
  latitudine 
  longiore 
  postice 
  

   canaliculato, 
  lateribus 
  paulo 
  obliquis, 
  antice 
  rotundatis, 
  parcius 
  grossius 
  punctato, 
  angulis 
  posticis 
  sub- 
  

   divergentibus, 
  elytris 
  striis 
  punctatis, 
  interstitiis 
  vage 
  punctulatis 
  et 
  rugosis, 
  antennis 
  pedibusque 
  rufis. 
  

   Long. 
  - 
  3. 
  

  

  Pennsylvania 
  and 
  Vermont. 
  Differs 
  from 
  the 
  preceding 
  by 
  its 
  more 
  brilliant 
  colour, 
  

   brownish 
  and 
  less 
  dense 
  pubescence, 
  and 
  by 
  the 
  coarser 
  and 
  more 
  distant 
  punctures 
  of 
  

   the 
  thorax. 
  

  

  8. 
  D. 
  sordidus, 
  fuscus, 
  dense 
  cinereo-pubescens, 
  thoraGe 
  latitudine 
  non 
  longiore, 
  lateribus 
  pa- 
  

   rallelis 
  antice 
  rotundatis, 
  postice 
  canaliculato, 
  confertim 
  punctato, 
  angulis 
  posticis 
  non 
  divergentibus, 
  

   elytris 
  striis 
  punctatis, 
  interstitiis 
  confertim 
  rugose 
  punctulatis, 
  antennis 
  rufis 
  pedibus 
  flavis. 
  Long. 
  "3. 
  

  

  New 
  York, 
  Mr. 
  Guex: 
  a 
  specimen 
  also 
  in 
  Dr. 
  Harris' 
  collection. 
  Resembles 
  somewhat 
  

   D. 
  mancus, 
  but 
  is 
  less 
  robust; 
  the 
  mandibles, 
  although 
  obtuse, 
  are 
  not 
  dilated 
  and 
  emar- 
  

   ginate, 
  as 
  in 
  that 
  species: 
  it 
  is 
  sufficiently 
  distinct 
  from 
  all 
  the 
  other 
  species 
  of 
  this 
  divi- 
  

   sion 
  by 
  its 
  densely 
  and 
  more 
  finely 
  punctured 
  thorax, 
  and 
  more 
  dense 
  pubescence. 
  

  

  9. 
  D. 
  s 
  t 
  a 
  b 
  i 
  1 
  i 
  s 
  , 
  ater, 
  fere 
  opacus, 
  pubescens, 
  thorace 
  latitudine 
  longiore, 
  lateribus 
  subparallelis, 
  

   antice 
  rotundatis, 
  alutaceo, 
  ante 
  medium 
  confertim 
  subtilius 
  punctato, 
  angulis 
  posticis 
  vix 
  divergenti- 
  

   bus, 
  elytris 
  ssepe 
  piceo-testaceis, 
  striis 
  acutis 
  punctatis, 
  interstitiis 
  planis 
  confertissime 
  rugose 
  punc- 
  

   tulatis, 
  antennis 
  pedibusque 
  piceo-testaceis. 
  Long. 
  "33 
  — 
  - 
  45. 
  

  

  Lake 
  Superior, 
  abundant. 
  A 
  species 
  easily 
  recognised, 
  and 
  very 
  remarkable 
  for 
  the 
  

   sculpture 
  of 
  the 
  thorax, 
  the 
  surface 
  of 
  which 
  is 
  finely 
  chagrined, 
  with 
  distinct 
  punctures 
  

   only 
  in 
  front 
  of 
  the 
  middle: 
  the 
  head 
  is 
  densely 
  punctured. 
  By 
  a 
  very 
  powerful 
  lens, 
  the 
  

   chagrining 
  of 
  the 
  thorax 
  is 
  seen 
  to 
  be 
  produced 
  by 
  an 
  infinity 
  of 
  very 
  small 
  punctures. 
  

  

  B.— 
  2**. 
  

  

  10. 
  D. 
  limosus, 
  ater, 
  flavo-pubescens, 
  clypeo 
  truncato, 
  thorace 
  latitudine 
  longiore, 
  lateribus 
  

   parallelis, 
  ad 
  apicem 
  rotundatis, 
  postice 
  canaliculato, 
  confertim 
  punctato, 
  angulis 
  posticis 
  rufescentibus 
  

   non 
  divaricatis, 
  elytris 
  tcstaceis, 
  striis 
  acutis 
  punctatis, 
  interstitiis 
  confertim 
  rugose 
  punctulatis, 
  an- 
  

   tennis 
  pedibusque 
  rufo-testaceis. 
  Long. 
  -35. 
  

  

  