﻿500 
  REVISION 
  OF 
  THE 
  ELATER 
  ID.l. 
  

  

  14. 
  C. 
  transf 
  ugus, 
  niger, 
  subtiliter 
  cinereo-pubescens, 
  tliorace 
  latitudine 
  sublongiore 
  antice 
  

   angustato, 
  postice 
  .subangustato, 
  latoribus 
  rotundatis, 
  valde 
  convexo, 
  subalutaceo, 
  parce 
  punctulato, 
  

   basi 
  biinipresso, 
  elytris 
  striis 
  subprofundis 
  subtilius 
  punctatis, 
  interstitiis 
  subconvexis, 
  piccis 
  humeris 
  

   late 
  testaceis, 
  pedibus 
  antennisque 
  flavis, 
  his 
  extrorsum 
  fuscescentibus. 
  Long. 
  -18. 
  

  

  One 
  specimen, 
  San 
  Jose, 
  California. 
  Tiiis 
  species 
  is 
  allied 
  to 
  the 
  next, 
  but 
  the 
  thorax 
  

   is 
  much 
  more 
  rounded 
  on 
  the 
  sides: 
  the 
  basal 
  striae 
  are 
  reduced 
  to 
  extremely 
  short 
  fis- 
  

   sures, 
  and 
  the 
  space 
  around 
  them 
  is 
  broadly 
  and 
  tolerably 
  deeply 
  foveate: 
  the 
  humeral 
  

   spot 
  is 
  oblong, 
  and 
  its 
  posterior 
  limit 
  badly 
  defined, 
  appearing 
  inclined 
  to 
  form 
  an 
  obso- 
  

   lete 
  vitta, 
  extending 
  nearly 
  to 
  the 
  tip 
  of 
  the 
  elytra; 
  the 
  suture 
  is 
  darker 
  than 
  the 
  rest 
  of 
  

   the 
  elytra. 
  

  

  15. 
  C. 
  curiatus, 
  niger, 
  nitidus, 
  griseo-pubescens, 
  tliorace 
  latitudine 
  vix 
  longiore, 
  lateribus 
  late 
  

   rotundatis, 
  modice 
  convexo, 
  parce 
  punctulato, 
  elytris 
  rufo-flavis, 
  sutura, 
  fascia 
  lata 
  ad 
  medium, 
  mar- 
  

   gineque 
  pone 
  medium 
  nigris, 
  striis 
  profundis, 
  subtilius 
  punctatis, 
  interstitiis 
  convexis 
  parce 
  punctula- 
  

   tis, 
  antennis 
  palpis 
  pedibusque 
  flavis. 
  Long. 
  "18. 
  

  

  Elater 
  curiatus 
  Say, 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  173. 
  

   Cardiophorus 
  areolatus 
  \~Er. 
  Germ. 
  Zeitschr. 
  '2, 
  320. 
  

  

  Middle 
  and 
  Southern 
  States, 
  sometimes 
  quite 
  abundant. 
  The 
  basal 
  fissures 
  are 
  here 
  

   merely 
  oblong 
  punctures, 
  but 
  there 
  appear 
  to 
  be 
  two 
  on 
  each 
  side, 
  placed 
  very 
  near 
  to- 
  

   gether. 
  Erichson 
  seems 
  to 
  have 
  placed 
  great 
  confidence 
  in 
  Dejean's 
  determination 
  (vide 
  

   C. 
  nigrqfasciatus 
  Dej. 
  Cat. 
  p. 
  104) 
  in 
  considering 
  this 
  species 
  as 
  Elater 
  areolatus 
  Say, 
  to 
  

   which 
  it 
  has 
  no 
  resemblance. 
  

  

  Div.5. 
  CEBRIONITES. 
  

  

  The 
  genera 
  here 
  contained 
  are 
  considered 
  by 
  most 
  systematic 
  entomologists 
  as 
  consti- 
  

   tuting 
  a 
  peculiar 
  family: 
  and 
  indeed 
  on 
  comparing 
  any 
  species 
  of 
  Cebrio 
  with 
  Elater, 
  it 
  is 
  

   difficult 
  to 
  come 
  to 
  any 
  other 
  conclusion. 
  The 
  number 
  of 
  genera 
  composing 
  the 
  supposed, 
  

   family 
  is 
  very 
  small, 
  and 
  they 
  are, 
  moreover, 
  rare 
  in 
  collections, 
  so 
  that 
  but 
  little 
  oppor- 
  

   tunity 
  is 
  afforded 
  for 
  studying 
  the 
  differences 
  in 
  structure. 
  Having 
  been 
  so 
  fortunate 
  as 
  

   to 
  discover 
  in 
  our 
  country 
  a 
  species 
  of 
  the 
  very 
  interesting 
  genus 
  Plastocerus, 
  recognised 
  

   as 
  entering 
  this 
  family, 
  and 
  two 
  other 
  genera 
  still 
  more 
  closely 
  allied 
  to 
  Elater, 
  I 
  have 
  

   been 
  convinced 
  of 
  the 
  necessity 
  either 
  of 
  restricting 
  the 
  family 
  Cebrionidoe 
  to 
  the 
  genus 
  

   Cebrio 
  alone, 
  (with 
  my 
  genus 
  Scaptolenus, 
  as 
  probably 
  a 
  division 
  of 
  it,) 
  distinguished 
  by 
  

   the 
  fifth 
  ventral 
  segment 
  of 
  the 
  abdomen 
  being 
  truncate; 
  or 
  to 
  place 
  the 
  family 
  Cebrionidoe 
  

   as 
  now 
  received 
  by 
  entomologists 
  with 
  the 
  Elateridae, 
  making 
  of 
  it 
  a 
  division 
  equal 
  in 
  value 
  

   to 
  the 
  genuine 
  Elaters, 
  and 
  distinguished 
  by 
  having 
  the 
  mandibles 
  long, 
  and 
  prominent; 
  

   from 
  the 
  other 
  great 
  group 
  containing 
  the 
  Eucnemidoe, 
  and 
  which 
  appears 
  to 
  osculate 
  with 
  

   the 
  present 
  division 
  in 
  Perothops, 
  the 
  genera 
  here 
  contained 
  differ 
  by 
  the 
  antenna? 
  being 
  

   widely 
  separated 
  as 
  in 
  Elater. 
  

  

  The 
  characters 
  then 
  of 
  the 
  present 
  division 
  are 
  as 
  follows 
  : 
  

  

  Caput 
  porrectum, 
  oculis 
  liber 
  is; 
  mandibular 
  elongatse, 
  porrectse, 
  scepe 
  tenues 
  ; 
  labrum 
  prsecipue 
  

   connatum 
  ; 
  clypeus 
  antice 
  non 
  dilatatus; 
  antennse 
  distantes, 
  in 
  fossulis 
  vix 
  distinctis 
  insertee; 
  pro- 
  

   sternum 
  non 
  lobatum, 
  sutura 
  laterali 
  prsecipue 
  indistinct 
  'um, 
  muerone 
  postico 
  in 
  aliis 
  distincto, 
  in 
  aliis 
  

  

  