﻿1'Ji 
  REVISION 
  OF 
  THE 
  F.I. 
  ATKUID.K 
  

  

  Oestodes 
  Lrc. 
  

  

  Frons 
  planiuscula, 
  lateribus 
  oblique 
  marginatis, 
  anticc 
  non 
  marginata; 
  labrum 
  antice 
  rotundatum 
  ; 
  

   mandibular 
  acutsv, 
  edentatse; 
  antennre 
  elongate, 
  serratre 
  11-articulatse, 
  articulo 
  1'"° 
  breviusculo, 
  2'" 
  1 
  " 
  

   parvo, 
  3 
  — 
  f> 
  latis 
  triangularibus, 
  scquentibus 
  sensim 
  angustioribus, 
  ll 
  m 
  " 
  paulo 
  longiore 
  non 
  constricto 
  ; 
  

   palpi 
  articulo 
  ultimo 
  ovali, 
  truncato; 
  prostornum 
  antice 
  truncatum 
  non 
  lobatum, 
  mucrone 
  postico 
  

   elongato, 
  acuto, 
  lateribus 
  rectis 
  non 
  excavatis; 
  mesostcrnurn 
  non 
  protuberans; 
  coxse 
  posticse 
  laminis 
  

   angustis 
  intus 
  vix 
  latioribus, 
  non 
  dentatis; 
  tarsi 
  tenues 
  pubescentes, 
  articulis 
  1 
  — 
  4 
  sensim 
  brevioribus, 
  

   5 
  to 
  elongato, 
  unguiculis 
  validis 
  simplicibus. 
  

  

  A 
  curious 
  genus 
  related 
  to 
  Campylus 
  by 
  the 
  absence 
  of 
  the 
  prosternal 
  lobe, 
  and 
  to 
  Co- 
  

   ryrabites 
  by 
  its 
  tarsi, 
  the 
  first 
  joint 
  of 
  which 
  is 
  not 
  conspicuously 
  longer 
  than 
  the 
  second; 
  

   the 
  front 
  is 
  entirely 
  that 
  of 
  Coryinbetes; 
  the 
  body 
  is 
  long, 
  slender, 
  and 
  subcylindrical. 
  

  

  1. 
  0. 
  tenuicollis, 
  niger, 
  nitidus, 
  glaber, 
  capite 
  parce 
  punctato, 
  thorace 
  vix 
  punctulato, 
  clytris 
  

   striato-punctatis, 
  interstitiis 
  parce 
  subtilitcr 
  rugoso 
  punctatis, 
  tibiis 
  tarsisque 
  tcstaceis, 
  antennis 
  

   nigris. 
  Long. 
  "27. 
  

  

  Elater 
  tenuicollis 
  Randall, 
  Bost. 
  Journ. 
  Nat. 
  Hist. 
  2, 
  14. 
  

  

  Vermont, 
  Prof. 
  Adams; 
  Maine 
  and 
  Massachusetts, 
  according 
  to 
  Randall. 
  The 
  elytra 
  

   vary 
  in 
  colour 
  from 
  black 
  to 
  yellow; 
  the 
  intermediate 
  variety 
  has 
  the 
  disc 
  yellow, 
  with 
  

   the 
  base, 
  margin 
  and 
  suture 
  black. 
  In 
  one 
  specimen 
  the 
  posterior 
  angles 
  of 
  the 
  thorax 
  

   are 
  yellowish. 
  

  

  In 
  the 
  species 
  of 
  this 
  genus 
  the 
  thorax 
  is 
  convex, 
  longer 
  than 
  wide, 
  parallel 
  on 
  the 
  sides, 
  

   and 
  slightly 
  constricted 
  near 
  the 
  posterior 
  angles, 
  which 
  are 
  long, 
  acute, 
  divergent, 
  and 
  

   finely 
  carinated; 
  the 
  base 
  is 
  not 
  fissured, 
  but 
  is 
  marked 
  each 
  side 
  with 
  a 
  tolerably 
  long 
  

   acutely 
  elevated 
  line; 
  the 
  body 
  is 
  glabrous 
  above, 
  but 
  a 
  few 
  short 
  hairs 
  may 
  be 
  perceived 
  

   towards 
  the 
  tip 
  and 
  margin 
  of 
  the 
  elytra; 
  the 
  thorax 
  in 
  the 
  male 
  is 
  more 
  constricted 
  pos- 
  

   teriorly 
  than 
  in 
  the 
  female, 
  whereby 
  its 
  outline 
  appears 
  less 
  straight. 
  

  

  2. 
  0. 
  graciliformis, 
  niger, 
  nitidus, 
  glaber, 
  capite 
  punctato, 
  tborace 
  subtilius 
  parce 
  punctato, 
  

   apice 
  angulisque 
  posticis 
  testaceis, 
  elytris 
  striato-punctatis, 
  interstitiis 
  subrugosis, 
  pedibus 
  flavis, 
  an- 
  

   tennis 
  fusco-testaceis. 
  Long. 
  -28. 
  

  

  Elater 
  graciliformis 
  Randall, 
  Bost. 
  Journ. 
  Nat. 
  Hist. 
  2, 
  13. 
  

  

  One 
  specimen, 
  Vermont, 
  Prof. 
  Adams. 
  In 
  form 
  precisely 
  similar 
  to 
  the 
  preceding. 
  

  

  Pedetes 
  Kirby. 
  

  

  There 
  are 
  a 
  number 
  of 
  North 
  American 
  Elaters 
  having 
  the 
  second 
  and 
  third 
  joints 
  of 
  

   the 
  tarsi 
  lobed 
  beneath; 
  the 
  first 
  joint 
  considerably 
  elongated; 
  the 
  coxal 
  plates 
  narrow, 
  

   and 
  the 
  front 
  produced 
  and 
  margined. 
  And 
  although 
  Germar 
  (Zeitschr. 
  2, 
  244) 
  com- 
  

   plains 
  that 
  he 
  has 
  not 
  been 
  able 
  to 
  detect 
  the 
  lobed 
  tarsi 
  in 
  the 
  species 
  mentioned 
  by 
  

   Kirby 
  as 
  the 
  type 
  of 
  his 
  genus, 
  this 
  confusion 
  is 
  not 
  to 
  be 
  wondered 
  at, 
  when 
  we 
  remem- 
  

   ber 
  the 
  very 
  different 
  names 
  applied 
  to 
  the 
  most 
  common 
  European 
  species 
  by 
  the 
  ento- 
  

   mologists 
  of 
  different 
  nations. 
  

  

  Our 
  genus 
  seems 
  to 
  be 
  equivalent 
  to 
  Athous, 
  as 
  defined 
  by 
  Latreille, 
  (Ann. 
  Ent. 
  Soc. 
  

   France, 
  1st 
  ser., 
  vol. 
  3,) 
  but 
  by 
  no 
  means 
  what 
  was 
  intended 
  by 
  Eschscholtz, 
  who 
  placed 
  

   his 
  Athous 
  in 
  a 
  group 
  in 
  which 
  the 
  tarsi 
  are 
  not 
  lobed. 
  The 
  species 
  may 
  be 
  naturally 
  

   grouped 
  as 
  follow 
  s 
  . 
  

  

  