﻿272 
  LE 
  CONTE.— 
  SYNOPSIS 
  OF 
  THE 
  

  

  B. 
  Spuria. 
  

  

  25. 
  J), 
  corvina, 
  oblongo-ovalis, 
  convexa, 
  piceo-nigra 
  nitida, 
  capite 
  coufertissime 
  punctato, 
  clypeo 
  mar- 
  

   ginato, 
  rotundato, 
  sutura 
  frontali 
  iinpressa, 
  thorace 
  latitudinc 
  plus 
  duplo 
  breviore, 
  fortius 
  sat 
  dense 
  

   punctato, 
  Iateribus 
  rotundati.s, 
  parcius 
  ciliatis, 
  angulis 
  posticis 
  obtusis 
  rotundatis, 
  elytris 
  seriatim 
  punc- 
  

   tatis, 
  vix 
  tricostatis, 
  punctis 
  internis 
  solis 
  confusis, 
  antenuis 
  palpisque 
  piceo-rufis, 
  unguibus 
  lissis. 
  Long. 
  

   •44. 
  

  

  One 
  specimen, 
  Fort 
  Yuma, 
  Colorado 
  River, 
  California. 
  This 
  insect 
  has 
  the 
  appear- 
  

   ance 
  of 
  a 
  large 
  Aphodius. 
  The 
  spaces 
  of 
  the 
  elytra 
  which 
  represent 
  the 
  costae 
  are 
  

   marked 
  each 
  with 
  a 
  row 
  of 
  small 
  punctures. 
  The 
  under 
  surface 
  is 
  very 
  coarsely 
  

   punctured, 
  and 
  the 
  punctures 
  have 
  short 
  yellowish 
  hairs. 
  The 
  pygidium 
  is 
  very 
  

   coarsely 
  and 
  the 
  propygidium 
  densely 
  punctured, 
  the 
  latter 
  is 
  transversely 
  elevated, 
  

   or 
  rather 
  broadly 
  sulcate 
  near 
  the 
  apex. 
  The 
  posterior 
  tibiae 
  at 
  the 
  outer 
  apical 
  

   angle 
  are 
  armed 
  with 
  three 
  longer 
  spines. 
  

  

  26. 
  D. 
  p 
  a 
  c 
  a 
  t 
  a 
  , 
  oblongo-ovata 
  convexa, 
  ferrugineo-picea, 
  nitida, 
  capite 
  confertini 
  punctato, 
  clypeo 
  subrotun- 
  

   dato, 
  marginato, 
  sutura 
  frontali 
  impressa, 
  vertice 
  vage 
  bifoveato, 
  thorace 
  sat 
  dense 
  punctato, 
  antrorsum 
  angus- 
  

   tato, 
  Iateribus 
  postice 
  cum 
  angulis 
  valde 
  rotundatis, 
  elytris 
  fortiter 
  seriatim 
  punctatis, 
  punctis 
  internis 
  

   solis 
  confusis 
  : 
  tibiis 
  anticis 
  tridentatis, 
  tarsis 
  anticis 
  anteenis 
  palpisque 
  runs, 
  unguibus 
  dente 
  ad 
  medium 
  

   armatis. 
  Long. 
  -32. 
  

  

  One 
  specimen 
  found 
  by 
  Dr. 
  Thomas 
  H. 
  Webb, 
  of 
  the 
  United 
  States 
  and 
  Mexican 
  

   Boundary 
  Commission, 
  in 
  the 
  valley 
  of 
  the 
  Gila. 
  The 
  form 
  is 
  that 
  of 
  most 
  Diplo- 
  

   taxis, 
  but 
  the 
  spiracles 
  of 
  the 
  propygidium 
  are 
  prominent 
  as 
  in 
  the 
  last 
  species. 
  The 
  

   mandibles 
  are 
  less 
  prominent 
  than 
  usual, 
  and 
  in 
  fact 
  hardly 
  visible. 
  The 
  propygi- 
  

   dium 
  and 
  pygidium 
  are 
  sculptured 
  as 
  in 
  the 
  preceding 
  ; 
  the 
  tooth 
  of 
  the 
  claws 
  is 
  per- 
  

   pendicular, 
  and 
  not 
  large. 
  

  

  C. 
  Spuria;. 
  

  

  27. 
  D. 
  brevidens, 
  oblonga, 
  convexa, 
  fusco-ferruginea 
  nitida, 
  capite 
  confertim 
  fortius 
  punctato, 
  subrotun- 
  

   dato, 
  clypeo 
  marginato, 
  antice 
  subemarginato, 
  clypeo 
  frontali 
  profunda, 
  thorace 
  fortius 
  punctato, 
  Iateribus 
  

   antice 
  obliquis, 
  dein 
  rotundatis, 
  angulis 
  posticis 
  valde 
  obtusis, 
  utrinque 
  ad 
  apicem 
  et 
  ad 
  medium 
  foveato 
  

   elytris 
  grossius 
  seriatim 
  punctatis, 
  punctis 
  internis 
  solis 
  confusis, 
  tibiis 
  anticis 
  valde 
  tridentatis, 
  ungui- 
  

   culis 
  medio 
  fortiter 
  dentatis. 
  Long. 
  .42- 
  

  

  One 
  specimen 
  found 
  by 
  Dr. 
  Thos. 
  H. 
  Webb 
  in 
  the 
  valley 
  of 
  the 
  Gila. 
  This 
  species 
  

   repeats 
  the 
  form 
  of 
  the 
  fifth 
  division, 
  as 
  the 
  next 
  does 
  the 
  second 
  of 
  the 
  genuine 
  

   Diplotaxes. 
  The 
  mandibles 
  are 
  more 
  prominent 
  than 
  usual, 
  and 
  bent 
  downwards, 
  

   so 
  that 
  the 
  ligula 
  is 
  covered 
  by 
  them. 
  The 
  pygidium 
  and 
  propygidium 
  are 
  very 
  

   coarsely 
  punctured, 
  and 
  the 
  latter 
  has 
  the 
  usual 
  transverse 
  impression 
  near 
  the 
  apex. 
  

   The 
  apical 
  fovea; 
  of 
  the 
  thorax 
  are 
  half 
  way 
  between 
  the 
  middle 
  line 
  and 
  the 
  angles, 
  

   the 
  others 
  are 
  near 
  the 
  side, 
  and 
  at 
  the 
  greatest 
  breadth. 
  

  

  28. 
  D. 
  H 
  a 
  y 
  d 
  e 
  n 
  i 
  i 
  , 
  oblonga-ovata, 
  rufo-ferruginea, 
  nitida, 
  convexa, 
  capite 
  sat 
  dense 
  punctato, 
  clypeo 
  

   fere 
  hemihexagono 
  marginato, 
  sutura 
  frontali 
  profunda, 
  froute 
  transversim 
  obsolete 
  elevata, 
  thorace 
  

  

  