﻿(62 
  REVISION 
  OF 
  THE 
  ELATERID 
  1 
  

  

  anterior 
  portion 
  of 
  the 
  fronl 
  are 
  distinct, 
  but 
  more 
  distant 
  than 
  in 
  the 
  preceding 
  species; 
  

  

  the 
  antenna' 
  arc 
  only 
  slightly 
  serrate, 
  and 
  the 
  third 
  joint 
  is 
  not 
  as 
  wide 
  as 
  the 
  fourth; 
  the 
  

   carina 
  of 
  the 
  posterior 
  angles 
  of 
  the 
  thorax 
  reaches 
  almost 
  to 
  the 
  middle; 
  the 
  first 
  joint, 
  

   especially 
  of 
  the 
  anterior 
  tarsi, 
  is 
  longer 
  in 
  proportion 
  than 
  in 
  the 
  preceding 
  species; 
  the 
  

   second 
  joint 
  appears 
  to 
  be 
  lobed, 
  but 
  I 
  am 
  not 
  certain 
  that 
  it 
  is 
  so; 
  the 
  third 
  joint 
  is 
  

   nearly 
  as 
  long 
  as 
  the 
  second, 
  and 
  extends 
  beneath 
  into 
  a, 
  lobe, 
  beyond 
  the 
  fourth 
  joint, 
  

   which 
  is 
  very 
  small; 
  the 
  fifth 
  is 
  as 
  long 
  as 
  the 
  three 
  preceding, 
  with 
  small 
  slender 
  nails. 
  

  

  Say 
  describes 
  the 
  tarsi 
  as 
  having 
  the 
  penultimate 
  joint 
  lobed, 
  but 
  as 
  the 
  present, 
  species 
  

   agrees 
  in 
  every 
  other 
  respect 
  with 
  his 
  description, 
  I 
  think 
  we 
  may 
  be 
  justified 
  in 
  consi- 
  

   dering 
  his 
  observation 
  as 
  an 
  error. 
  

  

  B. 
  Frons 
  non 
  cristata. 
  

  

  3. 
  J), 
  for 
  runs, 
  rufo-piceus, 
  longius 
  helvo-pilosus, 
  fronte 
  concava, 
  thorace 
  parce 
  grossius 
  punctato, 
  

   latitudinc 
  vix 
  longiore, 
  antrorsum 
  angustato, 
  ct 
  latcribus 
  paulo 
  rotundato, 
  spatio 
  dorsali 
  indistincto 
  

   lsevi, 
  clytris 
  postice 
  angustatis, 
  striis 
  punctatis, 
  interstitiis 
  subconvexis 
  parce 
  punctatis. 
  Long. 
  "56. 
  

  

  One 
  specimen, 
  Texas, 
  Lieut. 
  Haldeman. 
  The 
  front 
  is 
  more 
  produced 
  than 
  in 
  D. 
  rami- 
  

   cornis, 
  and 
  is 
  slightly 
  concave 
  above; 
  the 
  posterior 
  angles 
  of 
  the 
  thorax 
  are 
  carinated, 
  

   but 
  the 
  carina 
  is 
  less 
  acute 
  than 
  in 
  that 
  species. 
  The 
  lobes 
  of 
  the 
  tarsi 
  extend 
  to 
  the 
  

   middle 
  of 
  the 
  last 
  joint. 
  The 
  antenna) 
  are 
  blackish 
  and 
  formed 
  exactly 
  as 
  in 
  the 
  female 
  

   of 
  D. 
  ramicornis, 
  but 
  are 
  a 
  little 
  broader. 
  The 
  punctures 
  of 
  the 
  thorax 
  are 
  distant 
  in 
  the 
  

   middle, 
  but 
  moderately 
  close 
  on 
  the 
  sides; 
  there 
  is 
  a 
  rounded 
  indistinct 
  smooth 
  dorsal 
  

   space 
  behind 
  the 
  middle. 
  

  

  4. 
  D. 
  solcatus, 
  supra 
  castaneus, 
  helvo-pilosus, 
  fronte 
  subconcava, 
  thorace 
  grossius, 
  lateribus 
  den- 
  

   sius 
  punctato, 
  latitudinc 
  longiore, 
  antrorsum 
  angustato, 
  lateribus 
  rectis, 
  antice 
  paulo 
  rotundatis, 
  ely- 
  

   tris 
  subparallelis, 
  postice 
  rotundatis, 
  striis 
  punctatis, 
  interstitiis 
  parce 
  punctatis, 
  postpectore, 
  abdo- 
  

   mine, 
  antennis 
  pedibusque 
  rufis. 
  Long. 
  "45. 
  

  

  Mater 
  soleatus 
  Say, 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  176. 
  

  

  One 
  specimen, 
  Michigan. 
  This 
  species 
  is 
  closely 
  related 
  to 
  the 
  preceding, 
  but 
  the 
  

   more 
  densely 
  punctured 
  thorax, 
  and 
  rufous 
  antennae, 
  distinguish 
  it 
  at 
  once; 
  the 
  thorax 
  is 
  

   more 
  narrowed 
  anteriorly, 
  and 
  less 
  rounded 
  on 
  the 
  sides; 
  the 
  posterior 
  angles 
  are 
  more 
  

   acutely 
  carinated. 
  

  

  Say 
  states 
  that 
  the 
  second 
  joint 
  of 
  the 
  antenna) 
  is 
  "not 
  more 
  than 
  half 
  the 
  length 
  of 
  the 
  

   third;" 
  in 
  my 
  specimen, 
  as 
  in 
  the 
  preceding 
  and 
  next 
  species, 
  it 
  is 
  only 
  about 
  one-third 
  

   as 
  long 
  as 
  the 
  third 
  joint. 
  

  

  5. 
  D. 
  simplex, 
  piceus, 
  helvo-pilosus, 
  fronte 
  vix 
  concava, 
  thorace 
  minus 
  dense 
  punctato, 
  postice 
  

   canahculato, 
  antrorsum 
  angustato, 
  lateribus 
  parum 
  rotundatis, 
  elytris 
  striis 
  fortius 
  punctatis, 
  inter- 
  

   stitiis 
  planis 
  parce 
  punctulatis, 
  antennis 
  rufo-piceis, 
  pedibus 
  tcstaceis. 
  Long. 
  -35. 
  

  

  One 
  specimen, 
  Texas, 
  Lieut. 
  Haldeman. 
  From 
  D. 
  ferrous 
  it 
  is 
  distinguished 
  by 
  its 
  

   smaller 
  size, 
  brown 
  antenna), 
  unimpressed 
  front, 
  and 
  testaceous 
  feet; 
  from 
  D. 
  soleatus 
  by 
  

   the 
  less 
  densely 
  punctured 
  thorax, 
  the 
  less 
  deep 
  and 
  more 
  strongly 
  punctured 
  stria) 
  of 
  the 
  

   elytra, 
  and 
  by 
  the 
  deeper 
  colour 
  of 
  the 
  under 
  surface. 
  The 
  carina 
  of 
  the 
  posterior 
  angles 
  

   of 
  the 
  thorax 
  is 
  as 
  acute 
  as 
  in 
  D. 
  soleatus. 
  

  

  