﻿OF 
  THE 
  UNITED 
  STATES. 
  477 
  

  

  17. 
  C. 
  glandicolor, 
  castaneus, 
  fusco-pubescens, 
  fronte 
  minus 
  convexa, 
  thorace 
  latitudine 
  vix 
  

   longioro, 
  a 
  basi 
  sensim 
  angustato, 
  lateribus 
  rectis 
  ad 
  apicem 
  subito 
  rotundatim 
  angustatis, 
  postice 
  

   subcanaliculato, 
  parce 
  grosse 
  punctato, 
  elytris 
  subparallelis, 
  striia 
  punctatis, 
  intcrstitiis 
  planis 
  per- 
  

   parce 
  punctatis, 
  antennis 
  (feminpe) 
  pubescentibus, 
  articulis 
  2 
  et 
  3 
  sequalibus. 
  Long. 
  '70. 
  

  

  Melanotus 
  glandicolor 
  Mels. 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  2, 
  152. 
  

  

  One 
  specimen 
  from 
  Pennsylvania 
  in 
  Dr. 
  Melsheimer's 
  collection. 
  This 
  species 
  is 
  very 
  

   distinct 
  by 
  the 
  form 
  of 
  the 
  thorax, 
  the 
  sides 
  of 
  which 
  are 
  perfectly 
  straight 
  and 
  oblique 
  

   from 
  the 
  tip 
  of 
  the 
  posterior 
  angles 
  to 
  within 
  one-sixth 
  of 
  the 
  apex, 
  where 
  they 
  are 
  sud- 
  

   denly 
  rounded; 
  the 
  carina 
  of 
  the 
  posterior 
  angle 
  is 
  one-third 
  the 
  length 
  of 
  the 
  thorax. 
  

  

  18. 
  C. 
  f 
  i 
  s 
  s 
  il 
  i 
  s, 
  fusco-piceus, 
  bninneo-pubescens, 
  fronte 
  margine 
  paulo 
  reflexo, 
  parum 
  producto, 
  

   thorace 
  elytris 
  latiore, 
  latitudine 
  paulo 
  longiore, 
  antrorsum 
  valde 
  angustato, 
  lateribus 
  rotundatis, 
  an- 
  

   giitis 
  posticis 
  bicarinatis 
  non 
  divaricatis, 
  sat 
  grosse 
  punctato, 
  non 
  canaliculato, 
  elytris 
  a 
  basi 
  attenua- 
  

   tis, 
  seriatim 
  punctatis, 
  interstitiis 
  parce 
  punctatis, 
  et 
  rugosis, 
  antennis 
  articulo 
  3'° 
  sequente 
  vix 
  bre- 
  

   viore. 
  Long. 
  "56 
  — 
  -62. 
  

  

  Cratonychus 
  laticollis 
  Erichson, 
  Germ. 
  Zeitscbr. 
  3, 
  102. 
  

  

  f 
  Mater 
  brevieollis 
  Herbst, 
  Kiifer, 
  10, 
  46, 
  tab. 
  162, 
  fig. 
  3. 
  

  

  Cratonychus 
  ochraceipennis 
  Melsheimer, 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  2, 
  150. 
  

  

  Cratonychus 
  sphenoidalis 
  Mclshcimer, 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  2, 
  150 
  (teste 
  Melsbeimer.) 
  

  

  Mater 
  cinereusX(fissilis) 
  Say, 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  183. 
  

  

  Mater 
  [Melanotus) 
  cmerewsJHarris, 
  Ins. 
  Injurious 
  to 
  Vegetation 
  2nd 
  ed. 
  48. 
  

  

  Abundant 
  in 
  the 
  Middle 
  and 
  Southern 
  States. 
  Easily 
  distinguished 
  by 
  the 
  thorax 
  being 
  

   wider 
  than 
  the 
  elytra, 
  and 
  not 
  channelled. 
  C. 
  ochraceipennis 
  is 
  an 
  immature 
  specimen, 
  in 
  

   a 
  bad 
  condition. 
  The 
  posterior 
  angles 
  of 
  the 
  thorax 
  in 
  this 
  species 
  are 
  distinctly 
  bicari- 
  

   nate, 
  and 
  the 
  basal 
  fissures 
  very 
  distinct. 
  

  

  19. 
  C. 
  communis, 
  fuscus, 
  brunneo-pubescens, 
  fronte 
  non 
  concava, 
  paulo 
  producta, 
  thorace 
  elytris 
  

   sublatiore, 
  latitudine 
  non 
  longiore, 
  antrorsum 
  valde 
  angustato, 
  angulis 
  posticis 
  bicarinatis, 
  sat 
  grosse 
  

   punctato, 
  postice 
  canaliculato, 
  elytris 
  striis 
  subimpressis 
  punctatis, 
  interstitiis 
  minus 
  dense 
  rugose 
  

   punctulatis, 
  antennis 
  articulo 
  3'° 
  sequente 
  paulo 
  breviore. 
  Long. 
  *45 
  — 
  "55. 
  

  

  Dejean, 
  Cat. 
  ed. 
  3'°: 
  Erichson, 
  (!erm. 
  Zeitschr. 
  3, 
  102. 
  

  

  Elater 
  communis 
  Gyllenhal, 
  Schonh. 
  Syn. 
  Ins. 
  3, 
  Ap. 
  138, 
  (1817;) 
  Say, 
  Tr. 
  Am. 
  Phil. 
  Soc. 
  6, 
  184. 
  

  

  Perimecus 
  communis 
  Kirby, 
  Fauna 
  Bor. 
  Am. 
  148. 
  

  

  Mater 
  (Melanotus) 
  communis 
  Harris, 
  loc. 
  cit. 
  48. 
  

  

  Mater 
  cinereus 
  Weber, 
  Obs. 
  Ent. 
  77, 
  (1801.) 
  

  

  Abundant, 
  as 
  far 
  as 
  Nebraska. 
  The 
  last 
  synonym 
  is 
  usually 
  given 
  to 
  the 
  preceding 
  

   species, 
  but, 
  as 
  Weber 
  says, 
  "Thorax 
  punctatus 
  basi 
  canaliculars," 
  it 
  cannot 
  be 
  there 
  

   placed. 
  His 
  name 
  has 
  properly 
  priority; 
  but 
  as 
  many 
  entomologists 
  will 
  refuse 
  to 
  adopt 
  

   the 
  view 
  here 
  given, 
  (which 
  has 
  indeed 
  already 
  been 
  advanced 
  by 
  Kirby,) 
  the 
  change 
  of 
  

   name 
  would 
  only 
  lead 
  to 
  confusion. 
  

  

  One 
  specimen 
  from 
  New 
  Orleans, 
  given 
  me 
  by 
  Dr. 
  Schaum, 
  has 
  the 
  front 
  moderately 
  

   deeply 
  concave: 
  the 
  thorax 
  appears 
  a 
  little 
  less 
  convex, 
  and 
  more 
  deeply 
  channelled; 
  but 
  

   there 
  does 
  not 
  appear 
  sufficient 
  reason 
  to 
  separate 
  it. 
  

  

  20. 
  C. 
  exuberans, 
  fqsco-piceus, 
  brunneo-pubescens, 
  fronte 
  non 
  eoncava, 
  paulo 
  producta, 
  thorace 
  

  

  