﻿OF 
  THE 
  UNITED 
  STATES. 
  199 
  

  

  San 
  Diego, 
  California. 
  Resembles 
  the 
  next 
  species, 
  but 
  the 
  feet 
  are 
  entirely 
  black, 
  and 
  

   the 
  thorax 
  is 
  less 
  lustrous: 
  the 
  basal 
  striae 
  of 
  the 
  thorax 
  are 
  very 
  short, 
  and 
  the 
  base 
  is 
  

   deeply 
  and 
  decidedly 
  transversely 
  impressed 
  between 
  them. 
  

  

  10. 
  C. 
  lsevicollis, 
  plumbeo-nigcr, 
  subnitidus, 
  dense 
  fusco-pubescens, 
  thoracc 
  latitudine 
  non 
  bre- 
  

   viore, 
  convexo, 
  lateribus 
  rotundatis, 
  dense 
  subtiliter 
  punctulato, 
  postice 
  canaliculato, 
  angulis 
  posticis 
  

   divergentibus, 
  elytris 
  dorso 
  subdepressis, 
  striis 
  punctatis, 
  intcrstitiis 
  punctulatis, 
  vix 
  convexis, 
  pedibus 
  

   rufis, 
  femoribus 
  stepe 
  nigricantibus. 
  Long. 
  - 
  28. 
  

  

  ?Er. 
  Germ. 
  Zeitschr. 
  2, 
  300. 
  

  

  One 
  specimen 
  from 
  New 
  York, 
  in 
  which 
  the 
  anterior 
  thighs 
  alone 
  are 
  darker: 
  another 
  

   in 
  the 
  collection 
  of 
  Dr. 
  Harris, 
  having 
  both 
  thighs 
  and 
  tibiae 
  piceous. 
  The 
  palpi 
  are 
  black, 
  

   and 
  the 
  posterior 
  channel 
  of 
  the 
  thorax 
  is 
  deep: 
  these 
  cannot, 
  however, 
  be 
  constant 
  cha- 
  

   racters. 
  The 
  basal 
  stria? 
  of 
  the 
  thorax 
  are 
  short, 
  as 
  in 
  the 
  preceding 
  species. 
  From 
  the 
  

   next 
  species 
  it 
  diners 
  by 
  its 
  less 
  robust 
  form, 
  longer 
  and 
  less 
  inflated 
  thorax, 
  and 
  more 
  

   distinct 
  basal 
  stria?. 
  Erichson 
  does 
  not 
  mention 
  the 
  slight 
  flattening 
  of 
  the 
  disc 
  of 
  the 
  

   elytra. 
  

  

  11. 
  C. 
  r 
  o 
  b 
  u 
  s 
  t 
  u 
  s 
  , 
  pluinbeo-niger, 
  vel 
  scneo-niger, 
  minus 
  elongatus, 
  densius 
  cinereo-pubescens, 
  

   thorace 
  latitudine 
  breviore, 
  convexo, 
  subcanaliculato, 
  lateribus 
  rotundatis, 
  dense 
  subtiliter 
  punctulato, 
  

   angulis 
  posticis 
  vix 
  divergentibus, 
  elytris 
  dorso 
  subdepressis, 
  striis 
  punctatis, 
  interstitiis 
  planis, 
  dense 
  

   punctulatis, 
  pedibus 
  rufis, 
  femoribus 
  praecipue 
  infuscatis. 
  Long. 
  '36. 
  

  

  Middle 
  States. 
  If 
  it 
  were 
  not 
  for 
  the 
  superior 
  size, 
  this 
  might 
  be 
  considered 
  as 
  C. 
  la?vi- 
  

   collis, 
  but 
  the 
  thorax 
  is 
  fully 
  one-third 
  wider 
  than 
  long, 
  and 
  more 
  convex 
  than 
  in 
  the 
  pre- 
  

   ceding; 
  the 
  feet 
  vary 
  very 
  much 
  in 
  colour; 
  the 
  antenna? 
  are 
  always 
  entirely 
  black; 
  the 
  

   palpi 
  are 
  sometimes 
  black 
  and 
  sometimes 
  brown. 
  The 
  only 
  difference 
  between 
  this 
  and 
  

   the 
  last 
  is 
  in 
  size 
  and 
  form, 
  and 
  future 
  researches 
  may 
  show 
  that 
  these 
  variations 
  are 
  sex- 
  

   ual 
  in 
  their 
  character. 
  

  

  B. 
  Ungues 
  ad 
  medium 
  unidentati 
  : 
  tarsi 
  simplices. 
  Sp. 
  12 
  — 
  15. 
  

  

  12. 
  C. 
  suffl 
  at 
  us, 
  piceus, 
  subtiliter 
  griseo-pubescens, 
  thorace 
  latitudine 
  sublongiore, 
  antice 
  pos- 
  

   ticeque 
  angustato, 
  lateribus 
  rotundatis, 
  valde 
  convexo, 
  subalutaceo, 
  parce 
  punctulato, 
  elytris 
  striis 
  

   distincte 
  punctatis, 
  interstitiis 
  subplanis 
  vix 
  punctulatis, 
  antennis 
  palpis 
  pedibusque 
  flavis. 
  Long. 
  

   •20— 
  -2L 
  

  

  Two 
  specimens, 
  San 
  Diego, 
  California. 
  As 
  in 
  the 
  other 
  species 
  of 
  this 
  division 
  of 
  the 
  

   genus, 
  the 
  posterior 
  angles 
  of 
  the 
  thorax 
  are 
  longer 
  than 
  in 
  the 
  species 
  above 
  described, 
  

   and 
  project 
  directly 
  backwards: 
  the 
  basal 
  stria? 
  are 
  tolerably 
  long, 
  but 
  faint: 
  the 
  disc 
  of 
  

   the 
  thorax 
  is 
  obsoletely 
  channelled 
  posteriorly 
  : 
  the 
  elytra 
  are 
  more 
  rounded 
  at 
  the 
  hu- 
  

   merus 
  than 
  in 
  the 
  other 
  species, 
  and 
  are 
  not 
  wider 
  than 
  the 
  thorax. 
  

  

  13. 
  C. 
  in 
  an 
  us, 
  piceus, 
  subtiliter 
  griseo-pubescens, 
  thorace 
  latitudine 
  sublongiore, 
  antice 
  postice- 
  

   que 
  angustato, 
  lateribus 
  rotundatis, 
  valde 
  convexo, 
  subalutaceo, 
  parce 
  punctulato, 
  elytris 
  striis 
  par- 
  

   cius 
  punctatis, 
  interstitiis 
  planis, 
  vix 
  punctulatis, 
  basi 
  rufis, 
  antennis 
  piceis, 
  pedibus 
  flavis. 
  Long. 
  -15. 
  

  

  Two 
  specimens, 
  San 
  Diego. 
  Independently 
  of 
  size, 
  distinguished 
  by 
  the 
  piceous 
  anten- 
  

   nae 
  from 
  the 
  preceding, 
  which 
  it 
  very 
  much 
  resembles 
  in 
  form: 
  the 
  stria? 
  of 
  the 
  elytra 
  are 
  

   less 
  impressed 
  than 
  in 
  C. 
  sufflatus: 
  the 
  thorax 
  is 
  rufo-piceous 
  in 
  one 
  specimen. 
  

  

  