﻿OF 
  THE 
  UNITED 
  STATES. 
  489 
  

  

  San 
  Diego, 
  California. 
  This 
  species 
  in 
  characters 
  closely 
  resembles 
  C. 
  futilis: 
  besides 
  

   tie 
  differences 
  in 
  colour, 
  it 
  is 
  a 
  little 
  more 
  robust; 
  the 
  carina 
  of 
  the 
  posterior 
  angles 
  of 
  the 
  

   thorax 
  is 
  much 
  more 
  distinct, 
  being 
  one-third 
  the 
  length 
  of 
  the 
  thorax, 
  and 
  is 
  almost 
  pa- 
  

   rallel 
  with 
  the 
  margin. 
  

  

  To 
  this 
  genus 
  belongs 
  Elater 
  ch 
  or 
  is 
  Say, 
  (Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  172 
  :) 
  it 
  is 
  appa- 
  

   rently 
  allied 
  to 
  C. 
  pulchellus, 
  but 
  is 
  larger, 
  has 
  the 
  thorax 
  covered 
  with 
  golden 
  hair, 
  and 
  

   the 
  elytra 
  yellow 
  with 
  black 
  bands. 
  

  

  E. 
  nocturnus 
  Esch. 
  Thon. 
  Arch. 
  2, 
  33 
  : 
  Mann. 
  Bull. 
  Mosc. 
  1843, 
  239 
  ; 
  C. 
  m 
  u 
  scu 
  1 
  u 
  s 
  

   Esch. 
  ib.: 
  Mann.ib.; 
  and 
  C. 
  littoral 
  is 
  Esch. 
  ib.: 
  Mann. 
  Bull. 
  Mosc. 
  1846; 
  all 
  from 
  North- 
  

   western 
  America, 
  are 
  unknown 
  to 
  me. 
  

  

  C. 
  cinereipennis 
  Esch. 
  and 
  C. 
  p 
  u 
  b 
  e 
  r 
  u 
  1 
  u 
  s 
  Mann. 
  1. 
  c. 
  240, 
  do 
  not 
  belong 
  to 
  this 
  

   genus, 
  the 
  tarsi 
  being 
  furnished 
  with 
  a 
  lobe 
  beneath. 
  

  

  Elater 
  do 
  r 
  6a 
  1 
  i 
  s 
  Say, 
  and 
  E. 
  circumscriptus 
  Germ., 
  referred 
  by 
  Germar 
  (Zcitschr. 
  

   5, 
  146) 
  to 
  his 
  second 
  division 
  of 
  this 
  genus, 
  differ 
  by 
  their 
  narrower 
  prosternum, 
  subacu- 
  

   minate 
  mesosternum, 
  and 
  tarsi 
  destitute 
  of 
  elongate 
  seta?: 
  the 
  more 
  convex 
  and 
  deflexed 
  

   head 
  gives 
  them 
  more 
  resemblance 
  to 
  Elater, 
  in 
  general 
  appearance, 
  but 
  from 
  the 
  elongate 
  

   basal 
  joint 
  of 
  the 
  antennae 
  and 
  other 
  characters, 
  I 
  have 
  placed 
  them 
  in 
  Monocrepidius. 
  

  

  Oedostethus 
  Lee. 
  ~ 
  

  

  Frons 
  plana 
  semicircularis, 
  marginata, 
  tenuiter 
  canaliculata: 
  labrum 
  antice 
  rotundatum 
  : 
  mandibuhc 
  

   prominulse 
  parvse 
  obtusie 
  ; 
  antenna; 
  longiusculae, 
  vix 
  serratae, 
  articulo 
  1'"° 
  obconico 
  mediocri, 
  3™ 
  sequenti 
  

   non 
  breviore 
  2" 
  do 
  sesqui 
  longiore; 
  ll 
  mo 
  acuto, 
  non 
  constricto: 
  prosternum 
  antice 
  brevissime 
  lobatum, 
  

   mucronc 
  postico 
  non 
  inflexo, 
  medio 
  latius, 
  sutura 
  inde 
  convexa, 
  antice 
  paulo 
  exarata; 
  mesosternum 
  

   non 
  protuberans: 
  coxa3 
  postieffi 
  laminis 
  subsubito 
  parum 
  dilatatis, 
  vix 
  dentatis: 
  tarsi 
  elongati, 
  pubes- 
  

   centes, 
  tenuissimi, 
  articulis 
  1-4 
  sensim 
  brevioribus, 
  5 
  l 
  ° 
  l 
  mo 
  longicre, 
  unguiculis 
  medio 
  dente 
  forti 
  ar- 
  

   matis. 
  

  

  A 
  curious 
  little 
  subcylindrical 
  elongated 
  insect, 
  having 
  somewhat 
  the 
  appearance 
  of 
  a 
  

   slender 
  Cardiophorus, 
  or 
  some 
  of 
  the 
  last 
  described 
  species 
  of 
  Cryptohypnus, 
  with 
  the 
  

   thorax 
  distinctly 
  margined, 
  and 
  as 
  much 
  narrowed 
  in 
  front 
  of 
  the 
  spines 
  as 
  at 
  the 
  apex; 
  

   the 
  sides 
  are 
  considerably 
  rounded, 
  and 
  the 
  disc 
  convex; 
  the 
  posterior 
  angles 
  are 
  small, 
  

   acute, 
  diverging 
  and 
  carinated 
  ; 
  there 
  are 
  no 
  basal 
  fissures: 
  the 
  mandibles 
  are 
  more 
  pro- 
  

   minent 
  than 
  usual, 
  but 
  are 
  not 
  long 
  and 
  slender 
  as 
  in 
  the 
  Cebrionides. 
  

  

  1. 
  0. 
  femor 
  alis, 
  nigro-piceus, 
  tenuiter 
  cinereo-pubescens, 
  thorace 
  convexo, 
  rotundato, 
  latitu- 
  

   dine 
  longiore, 
  subtiliter 
  punctulato, 
  angulis 
  posticis 
  parvis 
  divergentibus, 
  elytris 
  confertim 
  punctula- 
  

   tis, 
  striis 
  obsoletis, 
  basi 
  et 
  versus 
  suturam 
  parum 
  distinctis, 
  antennarum 
  articulis 
  duobus, 
  pedibusque 
  

   flavis, 
  his 
  femoribus 
  infuscatis. 
  Long. 
  "18. 
  

  

  One 
  specimen 
  found 
  in 
  Missouri 
  Territory, 
  another 
  from 
  New 
  Jersey, 
  given 
  me 
  by 
  Mr. 
  

   Guex. 
  The 
  strife 
  of 
  the 
  elytra 
  are 
  very 
  fine 
  and 
  impunctured; 
  except 
  at 
  the 
  base, 
  and 
  

   towards 
  the 
  suture, 
  they 
  can 
  scarcely 
  be 
  seen. 
  The 
  head 
  is 
  punctulatc 
  like 
  the 
  thorax; 
  

   the 
  margin 
  is 
  very 
  slightly 
  reflexed, 
  and 
  the 
  impressed 
  frontal 
  line 
  is 
  not 
  abbreviated, 
  al- 
  

   though 
  not 
  deep. 
  

  

  