﻿OF 
  THE 
  UNITED 
  STATES. 
  419 
  

  

  1. 
  M. 
  imperfectus, 
  ater 
  brevissime 
  fusco-pubescens, 
  thorace 
  latitudine 
  breviore, 
  latcribus 
  antice 
  

   fortius 
  rotundatis, 
  punctato, 
  linea 
  dorsali 
  tenuissima 
  laevi, 
  angulis 
  posticis 
  inodice 
  carinatis, 
  linea 
  

   marginali 
  medio 
  obsoleta, 
  elytris 
  fortius 
  punctatis, 
  vix 
  stiiatis, 
  pedibus 
  rufis. 
  Long. 
  "22. 
  

  

  Lee. 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  G, 
  48. 
  

  

  New 
  York 
  and 
  Maryland. 
  The 
  antennae 
  of 
  the 
  male 
  are 
  dark 
  coloured 
  and 
  slightly 
  

   pectinate, 
  those 
  of 
  the 
  female 
  are 
  but 
  little 
  darker 
  than 
  the 
  feet, 
  and 
  moderately 
  serrate; 
  

   the 
  front 
  in 
  one 
  specimen 
  is 
  channeled, 
  but 
  this 
  is 
  a 
  character 
  of 
  but 
  little 
  value 
  in 
  the 
  pre- 
  

   sent 
  group 
  of 
  insects. 
  The 
  marginal 
  line 
  of 
  the 
  thorax 
  is 
  dislocated 
  and 
  interrupted 
  at 
  

   the 
  middle, 
  the 
  portion 
  from 
  the 
  anterior 
  angle 
  being 
  far 
  above 
  the 
  short 
  posterior 
  por- 
  

   tion, 
  which 
  is 
  connected 
  with 
  the 
  base; 
  the 
  pectoral 
  grooves 
  are 
  indistinct 
  posteriorly; 
  

   the 
  nails 
  of 
  the 
  tarsi 
  are 
  dilated 
  and 
  toothed 
  at 
  the 
  middle. 
  

  

  2. 
  M. 
  subsinua 
  tus, 
  ater 
  vix 
  fusco-pubescens, 
  thorace 
  latitudine 
  breviore, 
  antrorsum 
  subangus- 
  

   tato, 
  lateribus 
  obliquis 
  subsinuatis 
  non 
  rotundatis, 
  punctato, 
  postice 
  canaliculate, 
  ad 
  apicem 
  transver- 
  

   sirn 
  mavginato, 
  angulis 
  posticis 
  planis 
  paulo 
  inflexis, 
  linea 
  marginali 
  dislocata, 
  elytris 
  fortius 
  rugose 
  

   punctatis, 
  vix 
  striatis, 
  tarsis 
  testaceis. 
  Long. 
  "2. 
  

  

  LeConte, 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  G, 
  48. 
  

  

  Euenemis 
  triangularis 
  Harris, 
  Trans. 
  Hartford 
  Nat. 
  Hist. 
  Soc. 
  72. 
  

  

  One 
  male 
  specimen 
  found 
  in 
  the 
  upper 
  part 
  of 
  Georgia. 
  The 
  antenna; 
  are 
  three-fourths 
  

   as 
  long 
  as 
  the 
  body, 
  and 
  very 
  slightly 
  serrate; 
  the 
  pectoral 
  grooves 
  arc 
  deep 
  and 
  well 
  

   defined; 
  the 
  marginal 
  line 
  from 
  the 
  anterior 
  margin 
  of 
  the 
  thorax 
  in 
  this 
  species 
  almost 
  

   forms 
  a 
  junction 
  with 
  the 
  carina 
  of 
  the 
  posterior 
  angle, 
  which, 
  from 
  the 
  flattening 
  of 
  the 
  

   latter, 
  is 
  pushed 
  out 
  of 
  its 
  normal 
  position, 
  and 
  forms 
  the 
  lateral 
  edge; 
  the 
  basal 
  portion 
  

   of 
  the 
  true 
  marginal 
  line 
  is 
  deflexed 
  as 
  usual, 
  and 
  becomes 
  obsolete 
  in 
  front 
  of 
  the 
  middle. 
  

   The 
  claws 
  of 
  the 
  tarsi 
  are 
  not 
  toothed. 
  

  

  3. 
  M. 
  triangularis, 
  ater, 
  pubescens, 
  thorace 
  latitudine 
  breviore, 
  lateribus 
  parallelis, 
  apice 
  

   summa 
  rotundatis, 
  confertim 
  punctato, 
  angulis 
  posticis 
  acutis, 
  breviter 
  fortius 
  carinatis, 
  linea 
  magi- 
  

   nali 
  dislocata, 
  elytris 
  a 
  basi 
  angustatis, 
  apice 
  obtusis, 
  fortiter 
  punctatis 
  vix 
  striatis, 
  pedibus 
  testaceis, 
  

   antennis 
  piceis. 
  Long. 
  '1 
  — 
  "13. 
  

  

  LeConte, 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  G, 
  48. 
  

  

  Elater 
  triangularis 
  Say, 
  Journ. 
  Acad. 
  Nat. 
  Sc. 
  3, 
  170. 
  

  

  Euenemis 
  triangularis 
  Say, 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  189. 
  

  

  Southern 
  and 
  Western 
  States. 
  In 
  my 
  specimens, 
  the 
  antenna? 
  are 
  three-fourths 
  as 
  long 
  

   as 
  the 
  body, 
  and 
  very 
  slightly 
  serrate: 
  the 
  posterior 
  angles 
  are 
  not 
  flattened, 
  as 
  in 
  the 
  

   preceding 
  species; 
  the 
  anterior 
  part 
  of 
  the 
  marginal 
  line 
  is 
  very 
  short; 
  the 
  posterior 
  ex- 
  

   tends 
  in 
  front 
  of 
  the 
  middle, 
  and 
  is 
  deflexed, 
  as 
  usual. 
  The 
  pectoral 
  groove 
  is 
  moderately 
  

   well-defined, 
  and 
  the 
  claws 
  are 
  not 
  toothed. 
  Guerin 
  (Ann. 
  Ent. 
  Soc. 
  Fr., 
  2d 
  Ser., 
  1, 
  187) 
  

   refers 
  this 
  species 
  to 
  Euenemis, 
  but 
  Say 
  expressly 
  states 
  (Trans. 
  Am. 
  Phil. 
  Soc, 
  6, 
  189) 
  

   the 
  pectus 
  is 
  canaliculate 
  "each 
  side 
  of 
  the 
  middle." 
  Say 
  seems 
  at 
  first 
  to 
  have 
  considered 
  

   other 
  species 
  as 
  varieties 
  of 
  this, 
  as 
  in 
  the 
  Journal 
  of 
  the 
  Academy 
  he 
  mentions 
  individuals 
  

   having 
  the 
  elytra 
  striate, 
  and 
  others 
  with 
  the 
  third 
  joint 
  of 
  the 
  antenna! 
  less 
  elongated. 
  As 
  

   Say 
  does 
  not 
  mention 
  the 
  flat 
  and 
  incurved 
  posterior 
  angles 
  of 
  the 
  thorax, 
  it 
  will 
  be 
  more 
  

   prudent 
  to 
  consider 
  this 
  as 
  his 
  species, 
  although 
  somewhat 
  smaller 
  than 
  that 
  required 
  by 
  his 
  

   description. 
  

  

  