﻿I 
  s 
  I 
  REVISION 
  OF 
  THE 
  ELATEUIDA! 
  

  

  auritus, 
  and 
  easily 
  distinguished 
  from 
  both 
  hy 
  the 
  punctuation 
  of 
  the 
  thorax 
  being 
  com- 
  

   posed 
  of 
  large 
  and 
  small 
  points 
  intermixed: 
  a 
  large 
  series 
  of 
  specimens 
  would 
  undoubtedly 
  

   show 
  great 
  variations 
  in 
  colour. 
  

  

  8. 
  M. 
  bell 
  us, 
  crassiusculus, 
  niger, 
  flavo-pubescena, 
  thorace 
  distinctius 
  punctato, 
  linea 
  dorsali 
  an- 
  

   gulisque 
  posticis 
  brevibus 
  testaccis, 
  elytris 
  lineolis 
  pluribus 
  maculaque 
  ante 
  apicem 
  testaceis, 
  striis 
  

   antice 
  valde 
  punctatis, 
  interstitiia 
  subtilissime 
  punctulatis, 
  pedibus 
  antenuisque 
  flavis, 
  his 
  extrorsuui 
  

   crassioribus, 
  articulis 
  2 
  ct 
  '■'> 
  aequalibus, 
  4"' 
  vix 
  longiore. 
  Long. 
  "14 
  — 
  "16. 
  

  

  Dej. 
  Cat. 
  p. 
  98. 
  

  

  Elater 
  bellus 
  Say, 
  Journ. 
  Acad. 
  Nat. 
  Sc. 
  3, 
  168. 
  

  

  Oryptohypnus 
  bellus 
  Germ. 
  Zeitschr. 
  5, 
  147. 
  

  

  Abundant 
  in 
  the 
  middle 
  and 
  Western 
  States. 
  Although 
  Germar 
  affirms 
  positively 
  that 
  

   the 
  fourth 
  tarsal 
  joint 
  is 
  not 
  lobed, 
  I 
  find 
  no 
  difficulty 
  in 
  distinguishing 
  the 
  appendage, 
  

   when 
  it 
  is 
  not 
  obscured 
  by 
  dust; 
  it 
  seems, 
  in 
  proportion 
  to 
  size, 
  quite 
  as 
  distinct 
  as 
  in 
  M. 
  

   auritus. 
  

  

  C. 
  Tarsi 
  articulo 
  4 
  l 
  ° 
  nun 
  lobato 
  ; 
  frons 
  convexa. 
  

  

  9. 
  M. 
  c 
  omis, 
  testaccus, 
  subtiliter 
  longius 
  pubescens, 
  capite 
  piceo, 
  thorace 
  latitudine 
  longiore 
  an- 
  

   tice 
  angustato, 
  et 
  lateribus 
  rotundato, 
  sat 
  dense 
  subtilius 
  punctato, 
  vitta 
  dorsali 
  saepe 
  dilatata 
  picea, 
  

   elytris 
  striis 
  subtilibus 
  punctatis, 
  interstitiis 
  vix 
  subtilissime 
  punctulatis, 
  vitta 
  dorsali 
  antice 
  abbre- 
  

   viata 
  stcpissime 
  cum 
  sutura 
  confluente, 
  fasciaque 
  postica 
  nigro-piceis, 
  postpectore 
  abdomineque 
  piceis. 
  

   Long. 
  -22— 
  -3. 
  

  

  California: 
  found 
  at 
  San 
  Francisco 
  and 
  San 
  Jose. 
  This 
  species 
  resembles, 
  in 
  appear- 
  

   ance, 
  M. 
  dorsalis, 
  but 
  is 
  at 
  once 
  distinguished 
  by 
  the 
  finer 
  punctures 
  of 
  the 
  thorax, 
  and 
  

   the 
  less 
  deep 
  and 
  less 
  strongly 
  punctured 
  striae 
  of 
  the 
  elytra: 
  the 
  pubescence 
  is 
  longer 
  

   and 
  denser, 
  although 
  not 
  less 
  fine. 
  The 
  general 
  form 
  of 
  the 
  markings 
  of 
  the 
  elytra 
  is 
  that 
  

   of 
  M. 
  dorsalis, 
  but 
  the 
  dorsal 
  vitta 
  does 
  not 
  appear 
  to 
  be 
  ever 
  interrupted, 
  nor 
  is 
  it 
  ever 
  

   well 
  separated 
  from 
  the 
  suture, 
  and 
  is 
  most 
  frequently 
  entirely 
  confluent 
  with 
  the 
  suture. 
  

   The 
  prosternum 
  seems 
  to 
  be 
  always 
  more 
  or 
  less 
  piceous. 
  

  

  10. 
  M. 
  livens, 
  testaceus, 
  subtiliter 
  longius 
  pubescens, 
  capite 
  subinfuscato, 
  thorace 
  latitudine 
  lon- 
  

   giore, 
  antice 
  angustato 
  et 
  lateribus 
  rotundato, 
  sat 
  dense 
  minus 
  subtiliter 
  punctato, 
  vitta 
  dorsali 
  antice 
  

   abbreviata 
  infuscata, 
  saepe 
  obsoleta, 
  elytris 
  striis 
  modice 
  profundis 
  punctatis, 
  interstitiis 
  subtilissime 
  

   punctulatis, 
  sutura, 
  vitta 
  dorsali 
  antice 
  paulo 
  divergente 
  fasciaque 
  postica 
  infuscatis. 
  Long. 
  *29. 
  

  

  California, 
  at 
  Vallecitas 
  and 
  at 
  the 
  Colorado 
  river. 
  Differs 
  from 
  the 
  preceding 
  by 
  the 
  

   coarser 
  punctuation 
  of 
  the 
  thorax, 
  and 
  the 
  uniform 
  yellow 
  colour 
  of 
  the 
  under 
  surface. 
  

   In 
  one 
  specimen 
  the 
  fuscous 
  markings 
  of 
  the 
  upper 
  surface 
  are 
  reduced 
  to 
  an 
  ahgulated 
  

   band 
  near 
  the 
  tip 
  of 
  the 
  elytra, 
  and 
  slightly 
  dilated 
  along 
  the 
  suture. 
  

  

  11. 
  M. 
  circumscriptus, 
  nigro-piceus, 
  subtiliter 
  parce 
  pubescens, 
  thorace 
  latitudine 
  longiore, 
  

   testaceo, 
  vitta 
  dorsali 
  dilatata 
  nigro-picea, 
  confertim 
  minus 
  subtiliter 
  punctato, 
  elytris 
  striis 
  punc- 
  

   tatis, 
  sat 
  profundis, 
  interstitiis 
  punctulatis, 
  testaceis 
  vitta 
  integra 
  nigro-picea 
  postice 
  cum 
  sutura 
  con- 
  

   fluente; 
  abdomine 
  lateribus 
  rufescente, 
  antennis 
  pedibusque 
  flavis. 
  Long. 
  -2 
  — 
  -3. 
  

  

  Elater 
  circumseripfus 
  Germ. 
  Ins. 
  Nov. 
  46. 
  

  

  ? 
  Oryptohypnus 
  circumscriptus 
  Germ. 
  Zeitschr. 
  5, 
  146. 
  

  

  Middle 
  and 
  Southern 
  States. 
  I 
  place 
  a 
  query 
  before 
  the 
  last 
  synonym, 
  as 
  nothing 
  is 
  

  

  