﻿OF 
  THE 
  UNITED 
  STATES. 
  433 
  

  

  rate: 
  in 
  the 
  male 
  they 
  arc 
  longer, 
  in 
  the 
  female 
  shorter, 
  than 
  the 
  head 
  and 
  thorax: 
  the 
  form 
  

   of 
  body 
  is 
  more 
  robust 
  than 
  in 
  any 
  of 
  the 
  preceding 
  species: 
  the 
  posterior 
  angles 
  of 
  the 
  

   thorax 
  are 
  almost 
  rectangular. 
  

  

  17. 
  L. 
  dubitans, 
  minus 
  elongatus 
  ajneo-piceus, 
  fusco-pubescens, 
  capite 
  thoraceque 
  pilis 
  longio- 
  

   ribus 
  subhispidis, 
  clypeo 
  margine 
  antico 
  recto, 
  indistincto, 
  thorace 
  valde 
  convcxo, 
  punctato, 
  lateribus 
  

   rotundatis, 
  angulis 
  posticis 
  parvis 
  subacutis 
  subcarinatis, 
  elytris 
  striis 
  punctulatis, 
  interstitiis 
  vix 
  con- 
  

   vcxis, 
  dense 
  punctatis, 
  antcnni3 
  articulis 
  "2 
  et 
  3 
  subsequalibus, 
  4 
  to 
  coniunctis 
  longioribus. 
  Long. 
  -5. 
  

  

  New 
  York 
  and 
  Pennsylvania, 
  two 
  females: 
  still 
  more 
  robust 
  and 
  more 
  cylindrical 
  than 
  

   the 
  preceding, 
  to 
  which 
  it 
  appears 
  to 
  be 
  most 
  nearly 
  allied. 
  The 
  great 
  convexity 
  of 
  the 
  

   thorax, 
  which 
  is 
  hardly 
  narrower 
  in 
  front 
  than 
  at 
  the 
  base, 
  gives 
  this 
  species 
  somewhat 
  

   the 
  aspect 
  of 
  Cardiophorus, 
  while 
  by 
  the 
  indistinctness 
  of 
  the 
  anterior 
  margin 
  of 
  the 
  cly- 
  

   peus, 
  it 
  makes 
  the 
  transition 
  to 
  Corymbitcs. 
  

  

  18. 
  L. 
  c 
  a 
  n 
  u 
  s 
  , 
  piceo-niger, 
  valde 
  elongatus, 
  cinereo-pubescens, 
  capite 
  tboracequc 
  densius 
  pubes- 
  

   centibus, 
  pilisque 
  paucis 
  suberectis 
  vestitis, 
  clypeo 
  truncato, 
  margine 
  vix 
  reflcxo, 
  thorace 
  latitudine 
  

   sesqui 
  longiore, 
  antrorsum 
  angustato, 
  et 
  paulo 
  rotundato, 
  confertim 
  punctato, 
  canaliculato, 
  angulis 
  

   posticis 
  obtusis 
  subcarinatis 
  apice 
  rotundatis, 
  elytris 
  tenuiter 
  striato-punctatis, 
  interstitiis 
  dense 
  punc- 
  

   tatis, 
  pedibus 
  fere 
  piceis, 
  antennis 
  nigris, 
  articulis 
  2 
  et 
  3 
  subsequalibus, 
  4 
  t0 
  coniunctis 
  longioribus. 
  

   Long. 
  39. 
  

  

  One 
  specimen, 
  San 
  Diego, 
  California. 
  The 
  antennas 
  are 
  longer 
  than 
  the 
  head 
  and 
  tho- 
  

   rax, 
  and 
  strongly 
  serrate: 
  the 
  hairs 
  on 
  the 
  thorax 
  are 
  so 
  disposed 
  as 
  to 
  produce 
  a 
  faint 
  

   longitudinal 
  dark 
  line 
  from 
  the 
  basal 
  depression 
  on 
  each 
  side: 
  the 
  dorsal 
  channel 
  is 
  distinct 
  

   both 
  at 
  base 
  and 
  apex: 
  the 
  tibiae 
  and 
  tarsi 
  are 
  paler 
  than 
  the 
  femora. 
  The 
  general 
  form 
  

   is 
  that 
  of 
  the 
  male 
  of 
  L. 
  cylindriformis. 
  

  

  19. 
  L. 
  an 
  ceps, 
  elongatus, 
  piceo-oeneus, 
  densius 
  cinereo-pubescens, 
  clypeo 
  truncato, 
  vix 
  promi- 
  

   nulo, 
  thorace 
  latitudine 
  fere 
  sesqui 
  longiore, 
  lateribus 
  parum 
  rotundatis, 
  sat 
  punctato, 
  angulis 
  posticis 
  

   subacutis 
  vix 
  carinatis, 
  elytris 
  fuscis 
  striis 
  punctatis, 
  interstitiis 
  discrete 
  punctatis, 
  cpipleuris 
  pedibus- 
  

   que 
  obscure 
  runs, 
  antennis 
  piceis 
  articulo 
  3'° 
  4 
  t0 
  paulo 
  breviore. 
  Long. 
  *3 
  — 
  ^S. 
  

  

  Western 
  New 
  York: 
  specimens 
  from 
  Ohio 
  are 
  also 
  in 
  Dr. 
  Harris' 
  collection. 
  The 
  

   clypeus, 
  although 
  not 
  prominent, 
  is 
  decidedly 
  margined 
  anteriorly 
  : 
  the 
  absence 
  of 
  the 
  

   small 
  elevated 
  line 
  at 
  the 
  anterior 
  portion 
  of 
  the 
  indexed 
  margin 
  of 
  the 
  thorax 
  will 
  distin- 
  

   guish 
  it 
  from 
  L. 
  confusus 
  and 
  L. 
  plebcius, 
  to 
  which 
  it 
  bears 
  a 
  slight 
  resemblance: 
  the 
  form 
  

   is 
  more 
  slender, 
  being 
  about 
  the 
  same 
  as 
  L. 
  aurifer: 
  the 
  hair 
  on 
  the 
  elytra 
  is 
  so 
  dense 
  as 
  to 
  

   render 
  the 
  punctures 
  indistinct: 
  the 
  third 
  joint 
  of 
  the 
  antenna?, 
  though 
  not 
  as 
  wide 
  as 
  the 
  

   fourth, 
  is 
  perceptibly 
  dilated. 
  

  

  20. 
  L. 
  ectypus, 
  elongatus, 
  piceo-oeneus, 
  densius 
  cinereo-pubescens, 
  clypeo 
  truncato, 
  vix 
  promi- 
  

   nulo, 
  thorace 
  latitudine 
  longiore, 
  lateribus 
  late 
  rotundatis, 
  angulis 
  posticis 
  parum 
  productis 
  subacutis, 
  

   obsolete 
  carinatis, 
  sat 
  dense 
  punctato, 
  postice 
  canaliculato, 
  elytris 
  fusco-testaceis, 
  striis 
  punctatis, 
  inter- 
  

   stitiis 
  punctatis, 
  pedibus 
  antennisque 
  testaceis, 
  his 
  articulis 
  2 
  et 
  3 
  coniunctis 
  4 
  to 
  vix 
  longioribus. 
  Long. 
  -35. 
  

  

  JElater 
  ectypus 
  Say, 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  167. 
  

  

  A 
  typical 
  specimen 
  from 
  Maine, 
  in 
  Dr. 
  Harris' 
  collection. 
  Very 
  much 
  resembles 
  the 
  

   preceding, 
  but 
  the 
  proportion 
  between 
  the 
  basal 
  joints 
  of 
  the 
  antenna? 
  will 
  at 
  once 
  distin- 
  

   guish 
  it. 
  

  

  