﻿OF 
  the' 
  united 
  states. 
  C57 
  

  

  Although 
  the 
  form 
  of 
  the 
  front 
  of 
  this 
  species 
  is 
  nearly 
  that 
  of 
  Cryptohypnus 
  silaccipes, 
  

   the 
  shape 
  of 
  the 
  posterior 
  coxa 
  1 
  , 
  and 
  the 
  parallel 
  sides 
  of 
  the 
  prostemum, 
  prevent 
  its 
  as- 
  

   sociation 
  with 
  that 
  species. 
  

  

  - 
  2. 
  C. 
  rubidipennis, 
  crassiusculus, 
  niger, 
  supra 
  flavo-pubescens, 
  thoraoe 
  non 
  transverso, 
  ante 
  

   medium 
  rotundatim 
  angustato, 
  angulis 
  posticis 
  vix 
  divergentibus, 
  dense 
  subtiliter 
  punctato, 
  elytris 
  

   luridis, 
  Btriis 
  impunctatis, 
  intcrstitiis 
  subtilissime 
  punctulatis, 
  pedibus 
  ferrugincis, 
  antennis 
  nigris. 
  

   Long. 
  -37— 
  -42. 
  

  

  Lake 
  Superior, 
  not 
  rare. 
  This 
  species 
  differs 
  from 
  the 
  description 
  given 
  of 
  tn 
  e 
  d 
  i 
  a 
  n 
  u 
  s 
  

   Germ. 
  (Zeitsch. 
  4, 
  71) 
  by 
  the 
  impunctured 
  elytra] 
  stria3. 
  The 
  form 
  of 
  the 
  body 
  is 
  as 
  in 
  the 
  

   preceding; 
  the 
  third 
  joint 
  of 
  the 
  antenna 
  is 
  a 
  little 
  longer 
  than 
  the 
  second, 
  but 
  both 
  

   together 
  are 
  not 
  longer 
  than 
  the 
  fourth. 
  

  

  3. 
  C. 
  acutipennis, 
  crassiusculus, 
  niger, 
  subflavo-pubescens, 
  thorace 
  subtransverso, 
  antrorsum 
  

   angustato, 
  lateribus 
  rotundatis, 
  angulis 
  posticis 
  subdivergentibus, 
  dense 
  punctulato, 
  elytris 
  testaceo- 
  

   piceis, 
  striis 
  vix 
  punctatis, 
  intcrstitiis 
  distiucte 
  punctulatis 
  (apice 
  maris 
  acuminatis,) 
  antennis 
  pedibus- 
  

   que 
  rufo-testaceis. 
  Long. 
  # 
  38. 
  

  

  Diacanthus 
  acutipennis 
  Germ. 
  Zeitscbr. 
  4, 
  70. 
  

  

  Two 
  specimens 
  found 
  at 
  Ann 
  Arbor, 
  Michigan. 
  Germar 
  describes 
  the 
  stria 
  1 
  of 
  the 
  

   elytra 
  as 
  punctured; 
  in 
  one 
  specimen 
  they 
  appear 
  smooth, 
  in 
  the 
  other 
  they 
  are 
  feebly 
  

   punctured; 
  the 
  female 
  docs 
  not 
  differ 
  in 
  form 
  from 
  the 
  preceding 
  species; 
  the 
  male 
  has 
  

   the 
  apex 
  of 
  the 
  elytra 
  produced 
  and 
  acute. 
  The 
  third 
  joint 
  of 
  the 
  antenna) 
  is 
  one-half 
  

   longer 
  than 
  the 
  second. 
  

  

  4. 
  C. 
  propola, 
  niger, 
  cincreo-pubescens, 
  thorace 
  latitudine 
  non 
  breviorc, 
  apice 
  subangustato, 
  

   lateribus 
  rotundatis, 
  minus 
  dense 
  punctulato, 
  angulis 
  posticis 
  subtestaccis, 
  elytris 
  lurido-testaceis, 
  

   macula 
  utrinque 
  lunata, 
  postice 
  concava, 
  ad 
  medium 
  fusca, 
  tenuiter 
  striatis, 
  intcrstitiis 
  punctulatis, 
  

   antennis 
  piceis 
  basi 
  tcstaceis, 
  articulo 
  3'° 
  2 
  ndo 
  sesqui 
  longiore, 
  pedibus 
  piceis, 
  vel 
  testaceis. 
  Long. 
  -3 
  

   —•33. 
  

  

  Lake 
  Superior, 
  Eagle 
  Harbour; 
  found 
  also 
  in 
  Western 
  New 
  York. 
  The 
  less 
  densely 
  

   punctured 
  thorax 
  will 
  distinguish 
  this 
  from 
  the 
  other 
  species 
  of 
  this 
  group. 
  The 
  third 
  

   joint 
  of 
  the 
  antennae 
  is 
  shorter 
  than 
  the 
  fourth, 
  although 
  longer 
  than 
  in 
  the 
  preceding 
  

   species; 
  by 
  this 
  character 
  it 
  forms 
  a 
  transition 
  to 
  C. 
  hicroglyphicus. 
  In 
  my 
  catalogue 
  of 
  

   Lake 
  Superior 
  insects, 
  this 
  is 
  erroneously 
  placed 
  as 
  El. 
  curialus 
  Say. 
  

  

  5. 
  C. 
  triundulatus, 
  elongatus, 
  niger, 
  cinereo-sericeus, 
  thorace 
  convcxo, 
  latitudine 
  non 
  longiore, 
  

   lateribus 
  rotundatis, 
  angulis 
  posticis 
  brevibus 
  non 
  carinatis, 
  divaricatis, 
  subtiliter 
  dense 
  punctato, 
  

   Bubcanaliculato, 
  elytris 
  lateribus 
  vix 
  dilatatis, 
  luteo-tcstaceis, 
  fasciis 
  tribus 
  postice 
  concavis 
  subdenu- 
  

   datis 
  fuscescentibus, 
  striis 
  punctulatis, 
  intcrstitiis 
  planis, 
  dense 
  punctulatis, 
  antennarum 
  articulo 
  3'° 
  

   sequent! 
  breviore. 
  Long. 
  *28 
  — 
  - 
  35. 
  

  

  Elater 
  triundulatus 
  Randall, 
  Bost. 
  Joum. 
  Nat. 
  Hist. 
  2, 
  12. 
  

   Abundant 
  at 
  Lake 
  Superior, 
  and 
  in 
  Maine. 
  

  

  G. 
  C. 
  hieroglyphicus, 
  crassiusculus, 
  niger, 
  cincreo-pubescens, 
  thorace 
  aureo-sericeo, 
  dense 
  sub- 
  

   tiliter 
  punctato, 
  non 
  transverso, 
  lateribus 
  late 
  rotundatis, 
  angulis 
  posticis 
  subtestaccis, 
  elytris 
  luteo- 
  

   flavis, 
  macula 
  obliqua 
  humerali 
  per 
  suturam 
  exteusa, 
  alteraque 
  ad 
  medium 
  lunata 
  per 
  suturam 
  fere 
  ad 
  

   apiccm 
  producta 
  nigris, 
  striis 
  vix 
  punctatis, 
  intcrstitiis 
  subconvcxis, 
  punctatis, 
  antennis 
  pedibusque 
  

   rufis, 
  illis 
  extus 
  fuscescentibus, 
  articulo 
  3'° 
  4 
  l,J 
  non 
  breviore. 
  Lmh;_;. 
  •.">. 
  

  

  Elater 
  hieroglyphicus 
  Say. 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  <>. 
  172. 
  

  

  