﻿OF 
  THE 
  U.N'ITED 
  STATES. 
  429 
  

  

  A.— 
  a. 
  

  

  1. 
  L. 
  auripilis, 
  plumbeo-niger, 
  griseo-pubescens, 
  clypeo 
  emarginato, 
  aureo 
  piloso, 
  tliorace 
  po- 
  

   lito, 
  latitudine 
  sublongiore, 
  convexo, 
  minus 
  dense 
  grossius 
  punctato, 
  dense 
  aureo-piloso, 
  basi 
  canali- 
  

   culate-, 
  elytris 
  striis 
  punctatis, 
  interstitiis 
  planis, 
  confluenter 
  punctatis, 
  margine 
  basali 
  rufo, 
  epipleuris 
  

   pedibusque 
  runs, 
  antennis 
  nigris, 
  articulo 
  primo 
  prrccipue 
  rufo. 
  Long. 
  '35. 
  

  

  Mater 
  auripilis 
  Say, 
  Journ. 
  Acad. 
  Nat. 
  Sc. 
  3, 
  172; 
  Trans. 
  Am. 
  Phil. 
  Soc. 
  6, 
  178. 
  

  

  Southern 
  and 
  Western 
  States. 
  A 
  specimen 
  from 
  Alabama, 
  given 
  me 
  by 
  Mr. 
  Halde- 
  

   man, 
  has 
  the 
  antennae 
  entirely 
  black: 
  in 
  a 
  specimen 
  from 
  Illinois, 
  the 
  dense 
  hair 
  covering 
  

   the 
  head 
  and 
  thorax 
  is 
  less 
  yellow 
  than 
  in 
  the 
  others, 
  so 
  that 
  the 
  insect 
  has 
  a 
  dull 
  leaden 
  

   appearance. 
  The 
  distinction 
  between 
  this 
  and 
  the 
  next 
  species 
  rests 
  on 
  the 
  polished 
  sur- 
  

   face 
  of 
  the 
  thorax, 
  and 
  in 
  its 
  less 
  dense 
  punctuation, 
  characters 
  which, 
  though 
  obscured 
  

   by 
  the 
  dense 
  pubescence, 
  may 
  be 
  readily 
  seen. 
  The 
  lobes 
  of 
  the 
  clypeus 
  in 
  both 
  species 
  

   are 
  subacute. 
  

  

  2. 
  L. 
  pubicollis, 
  niger, 
  opacus, 
  griseo-pubescens, 
  clypeo 
  emarginato, 
  aureo-piloso, 
  'tborace 
  la- 
  

   titudine 
  sublongiore, 
  convexo, 
  dense 
  fere 
  confluenter 
  punctato, 
  aureo-piloso, 
  basi 
  canaliculato, 
  elytris 
  

   striis 
  punctatis, 
  interstitiis 
  planis 
  fere 
  confluenter 
  punctatis, 
  margine 
  basali 
  rufo, 
  epipleuris 
  pedibus- 
  

   que 
  runs. 
  Long. 
  -37 
  — 
  -46. 
  

  

  Georgia, 
  not 
  rare. 
  In 
  all 
  the 
  specimens 
  examined, 
  the 
  antenna? 
  are 
  entirely 
  black: 
  the 
  

   antenna? 
  of 
  the 
  male 
  are 
  a 
  little 
  longer 
  than 
  those 
  of 
  the 
  female, 
  and 
  more 
  strongly 
  ser- 
  

   rate; 
  in 
  both 
  this 
  and 
  the 
  preceding 
  species, 
  the 
  third 
  joint, 
  though 
  not 
  dilated, 
  is 
  scarcely 
  

   shorter 
  than 
  the 
  fourth. 
  

  

  A.— 
  3. 
  

  

  3. 
  L. 
  mirus, 
  atcr, 
  supra 
  opacus, 
  tenuiter 
  griseo-pubescens, 
  clypeo 
  concavo, 
  vix 
  sinuato, 
  thorace 
  

   latitudine 
  loDgiore 
  antrorsum 
  subangustato, 
  lateribus 
  fere 
  rectis, 
  confertim 
  punctato, 
  elytris 
  striis 
  

   punctatis 
  vix 
  impressis, 
  interstitiis 
  confertim 
  punctatis, 
  auruntiacis, 
  macula 
  postica 
  communi 
  magna 
  

   ad 
  apicem 
  extendente 
  nigra. 
  Long. 
  -37. 
  

  

  One 
  specimen, 
  San 
  Diego, 
  California. 
  Body 
  black, 
  above 
  without 
  lustre, 
  thinly 
  covered 
  

   with 
  short 
  gray 
  hairs: 
  antenna? 
  longer 
  than 
  the 
  head 
  and 
  thorax; 
  serrate: 
  second 
  and 
  

   third 
  joints, 
  together, 
  not 
  longer 
  than 
  the 
  fourth: 
  head 
  densely 
  punctured; 
  front 
  mode- 
  

   rately 
  produced, 
  slightly 
  concave, 
  anterior 
  margin 
  hardly 
  sinuate: 
  thorax 
  longer 
  than 
  wide, 
  

   slightly 
  and 
  regularly 
  narrowed 
  in 
  front, 
  scarcely 
  rounded 
  on 
  the 
  sides; 
  disc 
  somewhat 
  

   convex, 
  very 
  densely 
  punctured; 
  posterior 
  angles 
  not 
  divergent, 
  moderately 
  produced, 
  

   rounded 
  at 
  tip, 
  carina, 
  as 
  in 
  the 
  other 
  species 
  of 
  the 
  group, 
  short 
  and 
  parallel 
  with 
  the 
  

   margin 
  : 
  elytra 
  not 
  wider 
  than 
  the 
  thorax, 
  very 
  slightly 
  narrowed 
  from 
  the 
  base, 
  obtusely 
  

   rounded 
  at 
  the 
  apex; 
  strife 
  scarcely 
  impressed, 
  strongly 
  punctured, 
  interstices 
  finely 
  and 
  

   densely 
  punctured; 
  base 
  deeply 
  transversely 
  impressed; 
  colour 
  bright 
  orange, 
  with 
  the 
  

   posterior 
  third 
  covered 
  with 
  a 
  large 
  black 
  spot, 
  the 
  anterior 
  outline 
  of 
  which 
  is 
  oblique, 
  

   so 
  that 
  the 
  orange 
  colour 
  extends 
  along 
  the 
  sides 
  almost 
  to 
  the 
  apex. 
  In 
  this 
  species 
  and 
  

   in 
  the 
  next 
  the 
  last 
  joint 
  of 
  the 
  antennae 
  is 
  subacuminate; 
  in 
  all 
  the 
  other 
  species 
  known 
  

   to 
  me 
  it 
  is 
  rounded 
  at 
  tip. 
  

  

  4. 
  L. 
  aur 
  if 
  e 
  r, 
  ater, 
  subtiliter 
  cincreo-pubeseens, 
  clypeo 
  concavo 
  asneo, 
  thorace 
  latitudine 
  longiore, 
  

   lateribus 
  vix 
  rotundato, 
  aureo-purpureo 
  nitido, 
  parce 
  punctato, 
  postice 
  canaliculato, 
  elytris 
  fere 
  opa- 
  

   cis, 
  striis 
  punctatis 
  vix 
  impressis, 
  interstitiis 
  punctatis. 
  Long. 
  "24 
  — 
  *32. 
  

  

  