﻿OF 
  THE 
  UNITED 
  STATES. 
  503 
  

  

  1. 
  E. 
  lautus, 
  piceo-castaneus, 
  tenuiter 
  helvo-pubescens, 
  capite 
  thoraceque 
  sat 
  dense 
  punctatis, 
  

   hoe 
  latitudine 
  non 
  breviore, 
  antrorsum 
  paulo 
  angustato, 
  lateribus 
  late 
  sinuatim 
  rotundatis, 
  angulis 
  

   posticis 
  elongatis 
  valde 
  divergentibus, 
  elytris 
  tborace 
  paulo 
  latioribus, 
  seriatim 
  punctatis, 
  vage 
  sub- 
  

   sulcatis, 
  rugose 
  punctatis, 
  antennis 
  palpis 
  pedibusque 
  castaneo-rufis. 
  Long. 
  -92. 
  

  

  One 
  specimen 
  from 
  San 
  Diego, 
  California. 
  The 
  shallow 
  furrows 
  of 
  the 
  elytra 
  are 
  more 
  

   obvious 
  behind 
  the 
  middle. 
  

  

  Cebrio 
  Fabr. 
  

   Frons 
  paulo 
  convexa, 
  antice 
  non 
  marginata: 
  oculi 
  convexi 
  prominuli: 
  labrum 
  latum, 
  breve, 
  antice 
  

   prnecipue 
  late 
  emarginatum, 
  fronte 
  arete 
  connatum: 
  mandibular 
  elongatso 
  fere 
  rectangulariter 
  angu- 
  

   latse, 
  apice 
  tenues 
  acuta;: 
  palpi 
  maxillares 
  longiusculi, 
  articulis 
  cylindricis: 
  antenna; 
  subserrata;, 
  11- 
  

   articulatas, 
  articulo 
  l 
  m0 
  non 
  crassiore, 
  4 
  t0 
  ajquali; 
  2 
  et 
  3 
  coniunctis 
  4 
  to 
  sequalibus; 
  ll 
  mo 
  apice 
  subito 
  

   constricto 
  : 
  presternum 
  breve, 
  sutura 
  laterali 
  indistincta, 
  postice 
  longe 
  mucronatum 
  : 
  coxa; 
  antica; 
  

   maiuscula;, 
  mediae 
  contigua;, 
  posticse 
  laminis 
  intus 
  subito 
  dilatatis 
  : 
  tibia; 
  antica; 
  ad 
  apicem 
  extus 
  paulo 
  

   producta;, 
  calcaribus 
  mediocribus: 
  tarsi 
  paulo 
  pubescentes 
  longiusculi, 
  articulo 
  l 
  mo 
  elongato, 
  2 
  — 
  4 
  

   subaequalibus, 
  5 
  t0 
  longiore, 
  unguiculis 
  integris: 
  abdomen 
  articulo 
  5 
  to 
  truncato, 
  G 
  10 
  7 
  m 
  °que 
  conspicuis. 
  

  

  This 
  genus 
  is 
  distinguished 
  from 
  the 
  next 
  by 
  the 
  anterior 
  tibiae 
  being 
  less 
  compressed 
  

   and 
  not 
  emarginate 
  externally; 
  the 
  terminal 
  spurs 
  of 
  all 
  the 
  tibiae 
  are 
  moderate, 
  while 
  in 
  

   Scaptolenus, 
  they 
  are 
  very 
  long; 
  the 
  scutellum 
  is 
  obtuse 
  and 
  not 
  elongate. 
  The 
  species 
  

   resemble 
  each 
  other 
  very 
  closely, 
  and 
  are 
  only 
  to 
  be 
  recognised 
  by 
  the 
  organic 
  differ- 
  

   ences 
  pointed 
  out 
  below: 
  they 
  are 
  castaneous 
  above, 
  and 
  testaceous 
  yellow 
  below, 
  with 
  

   the 
  prosternum 
  dusky, 
  and 
  the 
  antennae 
  ferruginous. 
  Latreille 
  has 
  separated 
  C. 
  bicolor 
  

   as 
  a 
  distinct 
  genus 
  Selenodon, 
  but 
  such 
  an 
  arrangement 
  is 
  not 
  tenable. 
  

  

  A. 
  Palpi 
  articulo 
  ultimo 
  maxillarium 
  breviore. 
  

  

  1. 
  C. 
  bicolor, 
  castaneus, 
  helvo-pubescens, 
  minus 
  nitidus, 
  labro 
  late 
  emarginato, 
  thorace 
  lateri- 
  

   bus 
  parallelis 
  antice 
  rotundatis, 
  (maris 
  confertim, 
  fenrina; 
  parcius 
  punctato,) 
  angulis 
  posticis 
  subdiver- 
  

   gentibus, 
  elytris 
  striatis, 
  interstitiis 
  punctatis, 
  subtus 
  testaceus, 
  antennis 
  ferrugineis. 
  Long, 
  (mas,) 
  -7 
  : 
  

   (fern.) 
  -9. 
  

  

  Cebrio 
  bicolor 
  Fabr. 
  Syst. 
  El. 
  2, 
  14; 
  Beauvois, 
  Ins. 
  8, 
  tab. 
  7, 
  fig. 
  2. 
  

   Selenodon 
  bicolor 
  Latreille, 
  Ann. 
  Ent. 
  Soc. 
  France, 
  ser. 
  1, 
  3, 
  163. 
  

  

  Southern 
  and 
  Western 
  States, 
  not 
  rare. 
  The 
  female 
  is 
  apterous, 
  and 
  larger 
  and 
  stouter 
  

   in 
  its 
  form 
  ; 
  the 
  antennae 
  are 
  only 
  as 
  long 
  as 
  the 
  head 
  and 
  mandibles, 
  while 
  in 
  the 
  male 
  

   they 
  reach 
  beyond 
  the 
  base 
  of 
  the 
  thorax; 
  they 
  are 
  serrate 
  in 
  both 
  sexes, 
  with 
  the 
  last 
  

   joint 
  acuminate: 
  the 
  only 
  specimen 
  of 
  the 
  female 
  that 
  I 
  have 
  seen, 
  was 
  taken 
  in 
  Alabama 
  

   by 
  Mr. 
  Hentz, 
  and 
  given 
  me 
  by 
  Prof. 
  Haldeman. 
  In 
  both 
  sexes 
  the 
  apical 
  portion 
  of 
  the 
  

   mandibles 
  is 
  slender: 
  in 
  the 
  female 
  the 
  tarsi 
  are 
  shorter 
  than 
  in 
  the 
  male, 
  and 
  the 
  ante- 
  

   rior 
  tibiae 
  are 
  more 
  compressed. 
  

  

  As 
  this 
  seems 
  to 
  be 
  the 
  most 
  abundant 
  species, 
  it 
  is 
  probably 
  the 
  original 
  Cebrio 
  bi- 
  

   color. 
  

  

  2. 
  C. 
  simplex, 
  piceo-castaneus, 
  helvo-pubescens, 
  labro 
  non 
  emarginato, 
  thorace 
  antrorsum 
  sub- 
  

   angustato, 
  lateribus 
  fere 
  recti3 
  (maris 
  confertim 
  fere 
  confluenter 
  punctato) 
  angulis 
  posticis 
  subdiver- 
  

   gentibus, 
  elytris 
  nitidis 
  profundius 
  striatis, 
  interstitiis 
  punctatis, 
  subtus 
  testaceus, 
  antennis 
  ferru- 
  

   gineis. 
  Long. 
  *72. 
  

  

  VOL. 
  X. 
  — 
  81 
  

  

  