﻿266 
  LE 
  CONTE— 
  SYNOPSIS 
  OF 
  THE 
  

  

  0. 
  inxius, 
  oblonmis 
  paulo 
  eonvexus, 
  atcr 
  subnitidus, 
  capitc 
  dense 
  punetato, 
  vertice 
  vage 
  bifovcato, 
  

   clypeo 
  rotundato, 
  marginato, 
  antice 
  subemarginato, 
  sutura 
  frontali 
  utrin(|ue 
  profundiore, 
  thoracc 
  dens? 
  

   punetato, 
  subcanalioulato, 
  lateribus 
  rotundatis 
  ante 
  medium 
  angustato, 
  angulis 
  posticis 
  obtusis 
  subro- 
  

   tundatis, 
  elytris 
  punctatis, 
  subtricostatis, 
  oostis 
  uniseriatim 
  punctatis, 
  pygidio 
  grosse 
  punetato, 
  propy- 
  

   gidio 
  antice 
  subtiliter 
  postiee 
  grosse 
  punetato. 
  Long. 
  -41. 
  

  

  One 
  specimen 
  found 
  by 
  Thos. 
  H. 
  Webb, 
  M. 
  D. 
  of 
  the 
  U. 
  S. 
  and 
  Mexican 
  Boundary 
  

   Commission 
  in 
  the 
  valley 
  of 
  the 
  Gila. 
  The 
  under 
  surface 
  is 
  coarsely 
  punctured, 
  and 
  

   it 
  as 
  well 
  as 
  the 
  pygidium 
  is 
  sparsely 
  hairy. 
  

  

  Diplotaxis 
  Kirby. 
  

   The 
  species 
  in 
  this 
  genus 
  are 
  now 
  quite 
  numerous, 
  and 
  in 
  sculpture, 
  color 
  and 
  

   form 
  resemble 
  each 
  other 
  in 
  many 
  instances 
  very 
  closely 
  ; 
  I 
  have, 
  therefore 
  sought 
  

   to 
  establish 
  natural 
  divisions 
  by 
  which 
  they 
  may 
  be 
  classified 
  into 
  small 
  groups. 
  The 
  

   following 
  will 
  serve 
  the 
  purpose. 
  

  

  A. 
  GENTJ1NJE. 
  Ungues 
  omnes 
  fissi 
  ; 
  (h. 
  e. 
  dente 
  ungue 
  parum 
  breviore) 
  ; 
  spiracula 
  postica 
  haud 
  promi- 
  

  

  nula; 
  tborax 
  linea 
  apicali 
  nulla. 
  

  

  a. 
  Thorax 
  ad 
  angulos 
  plus 
  minusve 
  impressus, 
  angulis 
  anticis 
  proecipue 
  acuminatis. 
  

  

  Caput 
  haud 
  carinatum, 
  corpus 
  pubescens 
  

  

  Caput 
  haud 
  carinatum, 
  corpus 
  supra 
  glabrum 
  .... 
  

  

  Caput 
  carinatum, 
  corpus 
  supra 
  glabrum 
  .... 
  

  

  b. 
  Thorax 
  ad 
  angulos 
  haud 
  impressus 
  ; 
  caput 
  haud 
  carinatum. 
  

  

  Clypeus 
  hemihexagonus, 
  angulis 
  acutis 
  elevatis 
  

   Clypeus 
  varius, 
  angulis 
  rotundatis 
  vel 
  nullis 
  

  

  B. 
  SPURIjE. 
  Spiracula 
  postica 
  prominula. 
  

  

  Ungues 
  fissi 
  

  

  Ungues 
  medio 
  dentati 
  ...... 
  

  

  SPDRIjE. 
  Ungues 
  medio 
  dentati 
  ; 
  spiracula 
  postica 
  haud 
  prominula. 
  

   Thorax 
  linea 
  apieali 
  nulla 
  ...... 
  

  

  Thorax 
  ad 
  apicem 
  marginatus 
  

  

  I. 
  

  

  1. 
  D. 
  sordida, 
  nigra, 
  opaca, 
  undique 
  pube 
  erecta 
  brevi 
  fulva 
  vestita, 
  thorace 
  densius 
  pubescente, 
  elytris 
  

   subtilius, 
  thorace 
  capiteque 
  rugose 
  densissime 
  punctatis, 
  hoc 
  hemihexagono, 
  margine 
  reflexo, 
  antice 
  late 
  

   emarginato, 
  sutura 
  frontali 
  profunda, 
  utrinque 
  excavata, 
  tibiis 
  anticis 
  subtridentatis. 
  Long. 
  -47. 
  

  

  Meloloniha 
  sordida 
  Say, 
  Journ. 
  Acad. 
  Nat. 
  Sc. 
  5, 
  197. 
  

  

  Diplotaxis 
  carbonaria 
  Burm. 
  Lamell. 
  2, 
  2nd. 
  2G2. 
  

  

  Pennsylvania 
  and 
  Georgia; 
  rare. 
  The 
  thorax 
  is 
  transversely 
  broadly 
  sulcate 
  near 
  

   the 
  base 
  and 
  apex; 
  the 
  basal 
  angles 
  are 
  not 
  at 
  all 
  rounded, 
  the 
  sides 
  are 
  subangu- 
  

   lated 
  behind 
  the 
  middle, 
  and 
  the 
  anterior 
  angles 
  are 
  subacuminate. 
  Burmeister 
  

   describes 
  the 
  elytra 
  as 
  being 
  costate 
  ; 
  in 
  one 
  specimen 
  they 
  are 
  so, 
  in 
  another 
  there 
  

   are 
  faint 
  traces 
  of 
  external 
  stride, 
  and 
  of 
  the 
  three 
  discoidal 
  flattened 
  costa3. 
  The 
  

   teeth 
  of 
  the 
  anterior 
  tibia? 
  are 
  equidistant, 
  the 
  upper 
  one 
  is 
  feeble. 
  

  

  