﻿494 
  REVISION 
  OF 
  the 
  elaterida: 
  

  

  punctured 
  at 
  the 
  sides: 
  the 
  abdomen 
  is 
  -densely 
  and 
  finely 
  punctured, 
  the 
  last 
  joint 
  has 
  

   a 
  lew 
  larger 
  setigerous 
  punctures 
  each 
  side 
  near 
  the 
  tip. 
  

  

  2. 
  M. 
  piceus, 
  niger 
  nitidissimus, 
  thorace 
  a 
  basi 
  antforsum 
  subangustato, 
  latitudine 
  longiore, 
  la- 
  

   teribus 
  antice 
  rotundatis, 
  subtilius 
  punctato, 
  dcnsius 
  ad 
  latera, 
  elytris 
  subtiliter 
  seriatim 
  punctatis, 
  in- 
  

   terstitiis 
  subtilissime 
  parce 
  punctulatis. 
  Long. 
  -9 
  — 
  1-2. 
  

  

  Elater 
  piceus 
  De 
  Geer, 
  Ins. 
  4, 
  1(12, 
  tab. 
  18, 
  fig. 
  3, 
  (177.").) 
  

  

  -Elater 
  Isevigatus 
  Fabr. 
  Ent. 
  Syst. 
  emend. 
  Suppl. 
  138, 
  (1798:) 
  Syst. 
  El. 
  2, 
  22."): 
  Herbst, 
  Ka- 
  

   fer, 
  10, 
  15. 
  

  

  Elater 
  morio 
  (var.) 
  Say, 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  165. 
  

  

  Pristilophus 
  Isevigatus 
  Germ. 
  Zeitschr. 
  4, 
  84. 
  

  

  Pristilophus 
  femoralis 
  Melsheimer, 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  2, 
  210. 
  

  

  Middle, 
  Southern 
  and 
  Western 
  States, 
  abundant. 
  The 
  antennae 
  and 
  feet 
  are 
  described 
  

   as 
  fuscous 
  by 
  all 
  the 
  authors 
  : 
  the 
  latter 
  appear 
  to 
  me 
  to 
  be 
  black, 
  with 
  the 
  tarsi 
  brownish 
  

   piceous: 
  the 
  antennae 
  are 
  dull 
  black, 
  becoming 
  brownish 
  towards 
  the 
  tip. 
  These 
  are, 
  

   however, 
  characters 
  of 
  no 
  importance, 
  as 
  they 
  are 
  the 
  same 
  in 
  all 
  the 
  species. 
  

  

  A 
  specimen 
  from 
  Missouri 
  Territory, 
  has 
  the 
  punctures 
  of 
  the 
  thorax 
  and 
  of 
  the 
  elytra! 
  

   series 
  much 
  larger, 
  but 
  otherwise 
  presents 
  no 
  difference. 
  

  

  One 
  specimen 
  from 
  York 
  Co., 
  Pennsylvania, 
  given 
  me 
  by 
  the 
  Rev. 
  D. 
  Ziegler, 
  in 
  form 
  

   and 
  sculpture 
  agrees 
  exactly 
  with 
  the 
  others, 
  except 
  that 
  the 
  thorax, 
  instead 
  of 
  being 
  

   sparsely, 
  is 
  quite 
  densely 
  punctured: 
  the 
  punctures 
  at 
  the 
  sides 
  are 
  so 
  close 
  as 
  to 
  become 
  

   confluent; 
  towards 
  the 
  middle 
  of 
  the 
  base 
  they 
  are 
  finer 
  and 
  more 
  distant: 
  the 
  dorsal 
  line 
  

   is 
  more 
  deeply 
  impressed 
  than 
  usual. 
  From 
  the 
  next 
  species, 
  this 
  variety 
  is 
  distinguished 
  

   by 
  the 
  sides 
  of 
  the 
  thorax 
  converging 
  from 
  the 
  base, 
  and 
  by 
  the 
  posterior 
  angles 
  being 
  

   subacute, 
  as 
  in 
  the 
  preceding 
  species, 
  the 
  lateral 
  margin 
  being 
  slightly 
  dilated, 
  so 
  as 
  to 
  

   compress 
  the 
  elevated 
  ridge. 
  

  

  3. 
  M. 
  densus, 
  ater, 
  nitidus, 
  thorace 
  latitudine 
  non 
  longiore, 
  lateribus 
  parallelis 
  antice 
  rotunda- 
  

   tis, 
  confertim, 
  lateribus 
  confluenter 
  punctatis, 
  elytris 
  seriatim 
  punctatis, 
  interstitiis 
  punctulatis 
  et 
  ru- 
  

   gosis. 
  Long. 
  - 
  85 
  — 
  "95. 
  

  

  Specimens 
  collected 
  in 
  California 
  by 
  Mr. 
  Pease 
  and 
  Mr. 
  Child. 
  Brownish 
  black, 
  

   shining: 
  head 
  densely 
  punctured; 
  antenna 
  1 
  with 
  the 
  last 
  joint 
  more 
  obtuse 
  than 
  in 
  the 
  

   other 
  species: 
  palpi 
  black: 
  thorax 
  not 
  longer 
  than 
  wide; 
  sides 
  margined 
  as 
  usual, 
  parallel, 
  

   rounded 
  from 
  the 
  anterior 
  third 
  to 
  the 
  tip: 
  posterior 
  angles 
  not 
  divergent, 
  with 
  the 
  ele- 
  

   vated 
  ridge 
  broader 
  and 
  more 
  obtuse 
  than 
  in 
  M. 
  piceus; 
  disc 
  densely 
  moderately 
  finely 
  

   punctured; 
  punctures 
  confluent 
  at 
  the 
  sides, 
  less 
  dense 
  but 
  not 
  finer 
  towards 
  the 
  middle 
  of 
  

   the 
  base; 
  dorsal 
  line 
  very 
  short, 
  almost 
  obsolete: 
  elytra, 
  with 
  series 
  of 
  punctures, 
  as 
  in 
  

   M. 
  piceus, 
  the 
  outer 
  series 
  being 
  more 
  distinct; 
  interstices 
  tolerably 
  densely 
  punctate, 
  

   and 
  more 
  densely 
  finely 
  rugous 
  than 
  in 
  the 
  preceding 
  species. 
  Beneath, 
  as 
  in 
  M. 
  piceus. 
  

  

  4. 
  M. 
  m 
  or 
  i 
  o, 
  niger, 
  nitidus, 
  thorace 
  latitudine 
  longiore, 
  a 
  basi 
  subangustato, 
  lateribus 
  antice 
  

   rotundatis, 
  lateribus 
  confertim 
  medio 
  minus 
  dense 
  punctato, 
  elytris 
  striis 
  profundis 
  crenatis, 
  interstitiis 
  

   convcxis 
  parce 
  punctulatis, 
  subrugosis. 
  Long. 
  - 
  90 
  — 
  1-06. 
  

  

  Elater 
  morio 
  Fabr. 
  Ent. 
  Syst. 
  emend. 
  Suppl. 
  138: 
  Syst. 
  EI. 
  2, 
  225: 
  Herbst, 
  KSfer, 
  10, 
  28; 
  tab. 
  

   160, 
  fig. 
  7 
  : 
  Say, 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  G, 
  165. 
  

   Elater 
  lacunosus 
  Fabr. 
  Syst. 
  El. 
  2, 
  224. 
  

   Pristiloplius 
  morio 
  Germ. 
  Zeitschr. 
  4, 
  85. 
  

  

  