﻿1(50 
  REVISION 
  OF 
  THE 
  ELATF.KI 
  1: 
  1 
  

  

  elytris 
  a 
  basi 
  subangustatis, 
  striis 
  punctulatis, 
  interstitiis 
  confertim 
  rugose 
  punctulatis, 
  antennis 
  arti- 
  

   culis 
  2 
  et 
  3 
  subcylindricis, 
  4'" 
  coniunctis 
  non 
  longioribus. 
  Long. 
  '43. 
  

  

  One 
  specimen, 
  Pennsylvania. 
  The 
  narrow 
  arched 
  body, 
  narrowed 
  at 
  each 
  end, 
  with 
  

   the 
  thorax 
  fitted 
  closely 
  to 
  the 
  elytra, 
  give 
  this 
  species 
  very 
  much 
  the 
  appearance 
  of 
  some 
  

   of 
  the 
  Eucnemidesj 
  the 
  front 
  is 
  more 
  convex 
  than 
  in 
  the 
  other 
  species, 
  and 
  is 
  almost 
  

   angulated 
  at 
  the 
  tip. 
  The 
  lobe 
  of 
  the 
  third 
  tarsal 
  joint 
  is 
  very 
  long, 
  extending 
  to 
  the 
  

   middle 
  of 
  the 
  last 
  joint; 
  the 
  outer 
  margin 
  of 
  the 
  plates 
  of 
  the 
  posterior 
  coxa3 
  is 
  oblique, 
  

   and 
  the 
  posterior 
  margin 
  also 
  a 
  little 
  oblique 
  inwards, 
  and 
  they 
  unite 
  in 
  an 
  obtuse 
  angle 
  not 
  

   prominent, 
  but 
  scarcely 
  rounded. 
  The 
  thorax 
  has 
  a 
  short 
  furrow 
  at 
  the 
  middle 
  of 
  the 
  

   disc, 
  which 
  is 
  possibly 
  accidental; 
  the 
  carina 
  1 
  - 
  of 
  the 
  posterior 
  angles 
  diverge 
  very 
  much 
  

   from 
  the 
  margin. 
  

  

  2. 
  A. 
  recc 
  ilens, 
  latiusculus, 
  fusco-niger, 
  sordide 
  pubescens, 
  thorace 
  latitudine 
  fere 
  breviore, 
  an- 
  

   trorsum 
  angustato, 
  latcribus 
  rotundatis, 
  subtilius 
  punctato 
  (punctulis 
  paucis 
  intermixes,) 
  angulis 
  pos- 
  

   ticis 
  modice 
  productis 
  acutis, 
  elytris 
  parallelis 
  postice 
  rotundatis, 
  striis 
  punctatis, 
  interstitiis 
  planis 
  

   rugose 
  punctulatis, 
  antennis 
  articulis 
  2 
  et 
  3 
  subcylindricis, 
  4 
  to 
  coniunctis 
  vix 
  longioribus. 
  Long. 
  -2 
  — 
  -24. 
  

  

  San 
  Francisco. 
  The 
  smaller 
  sized 
  individuals 
  appear 
  to 
  be 
  more 
  densely 
  pubescent, 
  

   and 
  the 
  punctures 
  of 
  the 
  thorax 
  appear 
  more 
  distinct; 
  — 
  they 
  do 
  not, 
  however, 
  seem 
  to 
  

   be 
  specifically 
  distinct. 
  The 
  sides 
  of 
  the 
  thorax 
  are 
  more 
  rounded 
  anteriorly 
  than 
  at 
  the 
  

   base, 
  but 
  are 
  not 
  straight 
  at 
  any 
  part; 
  the 
  carina 
  diverges 
  very 
  much 
  from 
  the 
  margin, 
  

   as 
  in 
  the 
  preceding, 
  and 
  the 
  front 
  is 
  moderately 
  convex 
  and 
  slightly 
  angulated. 
  The 
  lobe 
  

   of 
  the 
  third 
  joint 
  of 
  the 
  tarsi 
  does 
  not 
  reach 
  quite 
  to 
  the 
  middle 
  of 
  the 
  fifth 
  joint. 
  

  

  To 
  this 
  genus 
  may 
  possibly 
  be 
  referred 
  Cryptohypnus 
  cinereipennis 
  Man. 
  (Monocrepi- 
  

   dius 
  cinereipennis 
  Esch.) 
  and 
  C. 
  puberulus 
  Man. 
  (Bull. 
  Mosc. 
  1843, 
  p. 
  210;) 
  of 
  which 
  the 
  

   fourth 
  tarsal 
  joint 
  is 
  said 
  to 
  be 
  lobed. 
  The 
  difficulty 
  of 
  determining 
  whether 
  the 
  lobe 
  pro- 
  

   ceeds 
  from 
  the 
  third 
  or 
  fourth 
  joint 
  is 
  sometimes 
  very 
  great. 
  At 
  all 
  events 
  the 
  species 
  

   alluded 
  to 
  cannot 
  be 
  retained 
  in 
  Cryptohypnus, 
  and 
  a 
  new 
  examination 
  is 
  necessary 
  to 
  fix 
  

   their 
  true 
  affinity. 
  

  

  Brachycrepis 
  Lcc. 
  

   Frons 
  convexa, 
  antice 
  vix 
  producta, 
  rotundatira 
  marginata, 
  non 
  impressa: 
  labrura 
  anticc 
  rotunda- 
  

   tum: 
  antennae 
  valde 
  serratre, 
  articulo 
  l 
  m0 
  mediocri, 
  2 
  1 
  ' 
  parvo, 
  3 
  10 
  sequenti 
  aequali, 
  11™° 
  pracedenti 
  

   non 
  longiore, 
  simplici: 
  prosternum 
  antice 
  lobatum, 
  mucrone 
  postico 
  subinflexo, 
  sutura 
  laterali 
  paulo 
  

   concava, 
  antice 
  excavata: 
  mesosternum 
  non 
  protuberans, 
  coxce 
  postica; 
  larninis 
  intus 
  subito 
  quadran- 
  

   gulariter 
  valde 
  dilatatis, 
  margine 
  postico 
  subsinuato, 
  dente 
  interno 
  mediocri, 
  acuto: 
  tarsi 
  pubescentes 
  

   articulo 
  l 
  mn 
  sequentibus 
  coniunctis 
  sequali: 
  2" 
  do 
  plus 
  duplo 
  breviore, 
  subtus 
  vix 
  lobato, 
  3'° 
  brevi, 
  sub- 
  

   tus 
  breviter 
  lobato, 
  4 
  t0 
  parvo 
  recepto, 
  5 
  t0 
  2 
  nJo 
  aequali, 
  unguiculis 
  integris. 
  

  

  The 
  lobe 
  of 
  the 
  third 
  joint 
  of 
  the 
  tarsi 
  does 
  not 
  extend 
  beyond 
  the 
  fourth 
  joint. 
  This 
  

   "cnus 
  differs 
  from 
  Dicrepidius 
  by 
  the 
  more 
  sudden 
  dilatation 
  of 
  the 
  coxal 
  plates, 
  as 
  well 
  

   as 
  by 
  the 
  structure 
  of 
  the 
  tarsi; 
  from 
  Anchastus, 
  it 
  is 
  readily 
  known 
  by 
  the 
  distinctness 
  

   of 
  the 
  outer 
  angle 
  of 
  the 
  coxal 
  plate 
  (the 
  posterior 
  margin 
  of 
  which 
  is 
  not 
  oblique 
  inwards, 
  

   but 
  slightly 
  cmarginatc,) 
  and 
  by 
  the 
  structure 
  of 
  the 
  antennae 
  and 
  tarsi. 
  The 
  posterior 
  

   angles 
  of 
  the 
  thorax 
  have 
  two 
  acute 
  carinas, 
  one 
  parallel 
  with 
  the 
  margin 
  as 
  in 
  Dicrepidius, 
  

   the 
  other 
  diverging 
  as 
  in 
  Anchastus. 
  

  

  