﻿MELOLONTHIDiE 
  OF 
  THE 
  UNITED 
  STATES. 
  203 
  

  

  ligula 
  truncata 
  ; 
  palpi 
  maxillares 
  articulo 
  ultimo 
  modice 
  ovali, 
  impresso. 
  Antennae 
  10-articulata\ 
  articulifl 
  

   3 
  — 
  5 
  connatis, 
  3 
  et 
  4 
  aequalibus 
  ; 
  clava 
  triarticulata, 
  maris 
  elongata, 
  feminse 
  parva. 
  Elytra 
  stria 
  suturali 
  

   profunda. 
  Abdomen 
  articulis 
  1 
  — 
  5 
  connatis, 
  suturis 
  haud 
  medio 
  obliterans, 
  6to 
  brevi 
  transverso. 
  Coxae 
  

   posticae 
  angulo 
  externo 
  producto. 
  Tibiae 
  anticae 
  tridentatae, 
  posteriores 
  uni-coronatae, 
  dcnteque 
  parum 
  pro- 
  

   minulo 
  superiore 
  prjecipue 
  arniatre, 
  bicalcaratse, 
  calcaribus 
  posticis 
  sexus 
  utriusque 
  mobilibus, 
  cxtcriore 
  lon- 
  

   giore: 
  tarsi 
  tibiis 
  longiores, 
  verticillatim 
  setosi, 
  postici 
  articulo 
  primo 
  paulo 
  breviore, 
  noununquam 
  tibiis 
  haud 
  

   longiores 
  ; 
  unguiculi 
  (maris 
  prcecipue) 
  subtus 
  sulcati, 
  biseriatim 
  pectinati, 
  vel 
  compressi, 
  medio 
  dentati, 
  

   subtus 
  plus 
  minusve 
  uniseriatim 
  serrulati. 
  

  

  By 
  the 
  discovery 
  of 
  new 
  species 
  I 
  have 
  been 
  compelled 
  to 
  modify 
  the 
  description 
  

   of 
  this 
  genus, 
  until 
  at 
  last 
  nothing 
  distinct 
  remains 
  to 
  separate 
  it 
  from 
  Lachnosterna. 
  

   In 
  one 
  species 
  the 
  serration 
  of 
  the 
  ungues 
  disappears 
  almost 
  entirely, 
  only 
  a 
  slight 
  

   trace 
  near 
  the 
  base 
  being 
  left. 
  There 
  is 
  however 
  a 
  peculiar 
  appearance 
  which 
  renders 
  

   the 
  genus 
  easy 
  of 
  recognition, 
  and 
  notwithstanding 
  the 
  remarkable 
  specific 
  and 
  sexual 
  

   characters., 
  would 
  make 
  any 
  further 
  subdivision 
  of 
  the 
  species 
  here 
  placed 
  under 
  it 
  

   eminently 
  unnatural. 
  

  

  A. 
  Tibiae 
  postica 
  3 
  , 
  sub-bicoronata3. 
  

  

  1. 
  L. 
  mucoreus, 
  longior, 
  convexus, 
  piceo-rufus, 
  capite 
  tboraceque 
  nitidis, 
  illo 
  piano 
  fortiter 
  marginato, 
  

  

  confertim 
  punctato, 
  antice 
  rotundato 
  haud 
  emarginato, 
  thorace 
  punctato, 
  lateribus 
  obtuse 
  angulatis, 
  

   antice 
  subserratis, 
  angulis 
  posticis 
  obtusis 
  haud 
  rotundatis 
  ; 
  elytris 
  parce 
  punctatis 
  et 
  breviter 
  pilosis, 
  

   glauco-pruinosis 
  ; 
  supra 
  versus 
  latera 
  parce 
  longe 
  pilosus, 
  pectore 
  villoso, 
  calcare 
  postico 
  externo 
  latiore 
  

   et 
  longiore, 
  tarsis 
  posticis 
  tibiis 
  multo 
  longioribus. 
  Long. 
  - 
  6 
  — 
  -65. 
  

  

  Maris 
  antennarum 
  clava 
  funiculo 
  vix 
  breviore 
  ; 
  pygidio 
  convexo, 
  unguibus 
  subtus 
  biseriatim 
  fortius 
  pectinatis; 
  

   antico 
  exteriore 
  prope 
  apicem 
  fere 
  dentato. 
  

  

  Feminas 
  unguibus 
  subtus 
  prope 
  apicein 
  acute 
  dentatis, 
  a 
  basi 
  ad 
  dentem 
  pectinatis, 
  postico 
  interiore 
  pectinato 
  

   haud 
  dentato; 
  pygidio 
  piano. 
  

  

  Fort 
  Yuma, 
  Colorado 
  River, 
  California; 
  Eagle 
  Pass, 
  Texas, 
  Mr. 
  Schott. 
  The 
  

   outer 
  spur 
  of 
  the 
  posterior 
  tibia? 
  is 
  longer 
  and 
  broader 
  than 
  the 
  inner 
  one, 
  both 
  are 
  

   flattened 
  and 
  obtuse. 
  The 
  hairs 
  towards 
  the 
  base 
  of 
  the 
  elytra 
  are 
  very 
  long. 
  

  

  2. 
  Ii. 
  t 
  e 
  x 
  a 
  n 
  u 
  s 
  , 
  longiusculus, 
  oblongus, 
  convexus, 
  piceo-rufus, 
  capite 
  tboraceque 
  nitidis, 
  illo 
  piano 
  fortiter 
  

  

  marginato, 
  confertim 
  punctato, 
  antice 
  rotundato 
  subemarginato, 
  thorace 
  minus 
  dense 
  punctato, 
  lateribus 
  

   fortius 
  angulatis 
  subserratis, 
  angulis 
  posticis 
  obtusis 
  haud 
  rotundatis, 
  ad 
  basin 
  longe 
  erecte 
  fimbriato, 
  

   elytris 
  parce 
  punctatis 
  et 
  breviter 
  pilosis, 
  glauco-prriinosis 
  ; 
  supra 
  versus 
  latera 
  parce 
  longe 
  pilosus, 
  

   pectore 
  villoso 
  ; 
  calcare 
  externo 
  postico 
  fere 
  duplo 
  latiore 
  et 
  longiore, 
  tarsis 
  posticis 
  tibiis 
  longioribus. 
  

   Long. 
  "5. 
  

   Mas 
  notis 
  sexus 
  sicut 
  in 
  prsecedente. 
  

  

  One 
  specimen 
  found 
  in 
  Texas 
  by 
  Mr. 
  Schott. 
  Closely 
  related 
  to 
  L. 
  mucoreus, 
  but 
  

   is 
  a 
  little 
  less 
  elongated, 
  with 
  the 
  sides 
  of 
  the 
  thorax 
  more 
  strongly 
  angulated, 
  and 
  

   subconcave 
  in 
  outline 
  behind 
  the 
  angle, 
  and 
  with 
  a 
  basal 
  fringe 
  of 
  long 
  erect 
  hairs, 
  

   the 
  inner 
  spur 
  of 
  the 
  posterior 
  tibiae 
  is 
  only 
  two-thirds 
  as 
  long 
  as 
  the 
  outer 
  one, 
  and 
  

   is 
  more 
  slender 
  than 
  in 
  the 
  preceding 
  species. 
  

  

  