﻿48 
  REVISION 
  OF 
  THE 
  CTCTNDELyE 
  OF 
  THE 
  UNITED 
  STATES. 
  

  

  The 
  thorax 
  has 
  more 
  or 
  less 
  elevated 
  posterior 
  angles, 
  and 
  in 
  the 
  female 
  is 
  sometimes 
  

   ■wider 
  towards 
  the 
  hase. 
  The 
  form 
  is 
  nearly 
  cylindrical, 
  the 
  front 
  is 
  hairy, 
  finely 
  striate 
  

   each 
  side. 
  The. 
  elytra 
  of 
  the 
  female 
  are 
  somewhat 
  -wider 
  than 
  those 
  of 
  the 
  male. 
  The 
  

   markings 
  are 
  either 
  narrow 
  or 
  wide; 
  the 
  humeral 
  hmule 
  is 
  recurved 
  posteriorly, 
  the 
  mid- 
  

   dle 
  band 
  is 
  long 
  and 
  fimbriate, 
  sometimes 
  tortuous 
  ; 
  the 
  whole 
  lateral 
  margin 
  is 
  white, 
  the 
  

   apical 
  lunule 
  is 
  lost 
  in 
  the 
  white 
  margin, 
  but 
  is 
  slightly 
  dilated 
  at 
  the 
  suture 
  and 
  at 
  the 
  

   anterior 
  extremity; 
  they 
  are 
  also 
  marked, 
  except 
  in 
  C. 
  sperata, 
  with 
  a 
  large 
  basal 
  spot: 
  

   the 
  tips 
  are 
  feebly 
  serrate. 
  The 
  body 
  beneath 
  is 
  densely 
  clothed 
  with 
  white 
  hair, 
  with 
  

   the 
  middle 
  of 
  the 
  pectus 
  and 
  the 
  abdomen 
  glabrous. 
  The 
  legs 
  are 
  long, 
  and 
  the 
  trochan- 
  

   ters 
  are 
  red. 
  The 
  labrum 
  is 
  three-toothed, 
  but 
  the 
  middle 
  tooth 
  is 
  more 
  prominent 
  ; 
  the 
  

   palpi 
  are 
  pale 
  with 
  dark 
  tips. 
  

  

  Two 
  principal 
  forms 
  may 
  be 
  distinguished 
  : 
  

  

  1. 
  Salt 
  water 
  species 
  having 
  the 
  elytra 
  rounded 
  on 
  the 
  sides, 
  with 
  the 
  suture 
  of 
  the 
  female 
  retracted, 
  and 
  the 
  

   tips 
  separately 
  rounded. 
  C. 
  lacerata 
  and 
  niarginata. 
  

  

  2. 
  Fluviatile 
  species 
  with 
  cylindrical 
  elytra, 
  which 
  in 
  the 
  female 
  are 
  ohliquely 
  sinuate 
  and 
  armed 
  with 
  an 
  ex- 
  

   ternal 
  tooth 
  near 
  the 
  tip. 
  C. 
  cuprascens, 
  blanda, 
  macra, 
  sperata. 
  

  

  35. 
  C. 
  lacerata, 
  olivaceo-wnea, 
  capite 
  thoraceque 
  subtiliter 
  albo-pubescentibus, 
  hoc 
  quadrato, 
  latitudine 
  sub- 
  

   longiore, 
  elytris 
  latiusculis 
  confertim 
  punctatis, 
  macula 
  basali, 
  margine 
  lato 
  lobato, 
  ramo 
  humcrali 
  subobliquo 
  hamato, 
  

   fascia 
  media 
  refracta 
  elongata 
  fimbriata, 
  lunulaque 
  apicali 
  utriuque 
  inflexa 
  albis, 
  ad 
  apicem 
  serrulatis 
  singulatim 
  ro- 
  

   tundatis, 
  spina 
  suturali 
  distincta; 
  subtus 
  dense 
  albo-pubescens, 
  medio 
  glabra, 
  pedibus 
  longissimis, 
  trochanteribus 
  

   rufis; 
  labro 
  albo 
  unidentato. 
  Long. 
  -42 
  — 
  45. 
  

  

  Mas 
  thorace 
  lateribus 
  vix 
  rotundatis, 
  mandibulo 
  dextro 
  dente 
  inferiore 
  obtuso 
  annate; 
  elytris 
  sutura 
  modice 
  re- 
  

   tracta. 
  

  

  Femina 
  thorace 
  lateribus 
  paulo 
  rotundatis; 
  elytris 
  sutura 
  valde 
  retracta 
  

   Chaudoir, 
  Bull. 
  Soc. 
  Imp. 
  Moscow, 
  1854. 
  

  

  Louisiana 
  and 
  Florida, 
  on 
  the 
  coast 
  of 
  the 
  gulf 
  of 
  Mexico. 
  Quite 
  distinct 
  from 
  the 
  fol- 
  

   lowing 
  by 
  the 
  broader 
  elytra 
  of 
  the 
  female 
  not 
  being 
  deflexed 
  at 
  tip, 
  and 
  by 
  the 
  inferior 
  

   tooth 
  of 
  the 
  right 
  mandible 
  of 
  the 
  male 
  being 
  obtuse, 
  and 
  by 
  the 
  difference 
  in 
  the 
  apical 
  

   angles 
  of 
  the 
  elytra. 
  

  

  36. 
  C. 
  marginata, 
  olivaceo-renca, 
  capite 
  thoraceque 
  subtilius 
  albo-pubescentibus, 
  hoc 
  quadrato, 
  elytris 
  con- 
  

   fertim 
  punctatis 
  ad 
  apicem 
  serrulatis, 
  macula 
  basali, 
  margine 
  lato 
  lobato, 
  ramo 
  subhumerali 
  subobliquo 
  hamato, 
  fas- 
  

   cia 
  media 
  longa 
  refracta 
  fimbriata, 
  lunulaque 
  apicali 
  utrinque 
  inflexa 
  albis; 
  subtus 
  dense 
  albo-pubescens, 
  medio 
  

   glabra, 
  trochanteribus 
  rufis, 
  pedibus 
  elongatis; 
  labro 
  albo 
  unidentato. 
  Long. 
  -43 
  — 
  -55. 
  

  

  Mas 
  thorace 
  postice 
  haud 
  latiore, 
  mandibulo 
  dextro 
  dente 
  elongate 
  inferiore 
  armato, 
  elytris 
  spina 
  suturali 
  promi- 
  

   nula. 
  

  

  Femina 
  thorace 
  postice 
  subampliato, 
  elytris 
  sutura 
  valde 
  retracta 
  ad 
  apicem 
  deflexis. 
  

  

  Fabr. 
  Syst. 
  El. 
  1,241: 
  Herbst, 
  Kafer, 
  10, 
  206: 
  Say, 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  1,417; 
  tab. 
  13, 
  f. 
  6: 
  Gould, 
  

   Bost. 
  Journ. 
  Nat. 
  Hist. 
  1, 
  48. 
  

  

  C. 
  variegata 
  Dej. 
  Sp. 
  Gen. 
  1, 
  84. 
  

  

  Variat 
  maculis 
  obsoletis, 
  margine 
  lato, 
  maculaque 
  basali 
  utrinque 
  relictis. 
  

  

  