﻿:.'7s 
  LE 
  CONTE.— 
  SYNOPSIS 
  OF 
  THE 
  

  

  One 
  specimen 
  from 
  Georgia. 
  Differs 
  from 
  the 
  preceding 
  by 
  the 
  longer 
  erect 
  hairs 
  of 
  

   the 
  thorax 
  and 
  by 
  the 
  long 
  hairs 
  of 
  the 
  pygidium 
  and 
  base 
  of 
  the 
  elytra. 
  The 
  color 
  

   beneath 
  is 
  entirely 
  testaceus, 
  but 
  specimens 
  will 
  probably 
  occur 
  of 
  a 
  darker 
  color. 
  

   The 
  abdomen 
  is 
  convex 
  like 
  that 
  of 
  a 
  female, 
  but 
  there 
  are 
  coarse 
  long 
  bristles 
  

   scattered 
  on 
  each 
  segment 
  about 
  the 
  middle. 
  

  

  3. 
  51. 
  angustatus, 
  testaceus 
  vel 
  niger, 
  undique 
  pube 
  appressa 
  squamulosa 
  pollinosa 
  dense 
  vestitus, 
  

   capite 
  thoraceque 
  nigris, 
  hoc 
  subconvexo 
  maris 
  latitudine 
  sesqui 
  longiore, 
  elytris 
  fundo 
  testaceis, 
  ano 
  

   setoso, 
  antennis 
  pedibusque 
  testaceis, 
  tarsis 
  nigro-annulatis. 
  Long. 
  *35. 
  

  

  Melolontha 
  elongata\\ 
  Herbst, 
  Col. 
  3, 
  145, 
  tab. 
  26, 
  fig. 
  3. 
  

  

  Melolontha 
  angustata 
  Beauv. 
  Ins. 
  30, 
  tab. 
  5, 
  fig. 
  G. 
  

  

  Macrodactylus 
  polyphagia 
  Burm. 
  Lamell. 
  2, 
  2nd, 
  57. 
  

  

  Southern 
  States, 
  Kansas, 
  and 
  as 
  far 
  south-west 
  as 
  Chihuahua. 
  This 
  species 
  is 
  more 
  

   slender 
  in 
  its 
  form 
  and 
  is 
  readily 
  known 
  from 
  the 
  others 
  by 
  the 
  longer 
  thorax 
  and 
  

   total 
  absence 
  of 
  erect 
  hairs. 
  Herbst 
  in 
  the 
  description 
  insists 
  so 
  strongly 
  on 
  the 
  

   " 
  flachliegenden 
  Harchen," 
  that 
  I 
  have 
  considered 
  the 
  species 
  as 
  known 
  to 
  him. 
  The 
  

   characters 
  given 
  by 
  Burmeister 
  are 
  relative, 
  except 
  that 
  he 
  states 
  the 
  anus 
  to 
  be 
  tes- 
  

   taceous. 
  It 
  is 
  so 
  in 
  all 
  the 
  specimens 
  before 
  me, 
  but 
  sometimes 
  too 
  the 
  whole 
  abdo- 
  

   men 
  is 
  of 
  the 
  same 
  color. 
  The 
  abdomen 
  of 
  the 
  female 
  is 
  large 
  and 
  convex, 
  with 
  a 
  

   few 
  bristles 
  at 
  the 
  middle 
  of 
  the 
  four 
  anterior 
  joints 
  ; 
  that 
  of 
  the 
  male 
  is 
  more 
  com- 
  

   pressed, 
  with 
  numerous 
  spine-like 
  bristles 
  arranged 
  in 
  rows 
  each 
  side 
  of 
  the 
  middle. 
  

  

  7. 
  DICHELONYCH^E. 
  

  

  A 
  small 
  group, 
  confined 
  to 
  the 
  American 
  continent, 
  and 
  of 
  which 
  the 
  well 
  known 
  

   genus 
  from 
  which 
  it 
  derives 
  its 
  name 
  is 
  the 
  sole 
  representative 
  within 
  our 
  territory. 
  

   As 
  a 
  group, 
  it 
  is 
  distinguished 
  from 
  foreign 
  groups 
  among 
  the 
  Melolonthidae 
  with 
  

   prominent 
  conical 
  anterior 
  coxa?, 
  free 
  labrum 
  and 
  abdominal 
  segments, 
  by 
  the 
  ligula 
  

   being 
  connate 
  with 
  the 
  mentum, 
  the 
  labrum 
  large, 
  vertical 
  and 
  deeply 
  emarginate, 
  

   and 
  by 
  the 
  sternum 
  not 
  being 
  protuberant. 
  The 
  thorax 
  as 
  in 
  Diplotaxes 
  has 
  a 
  nar- 
  

   row 
  apical 
  membranous 
  margin. 
  With 
  regard 
  to 
  the 
  position 
  of 
  the 
  group, 
  Lacordaire 
  

   forms 
  with 
  it 
  the 
  passage 
  from 
  the 
  Sericoides 
  to 
  the 
  Macrodactylides 
  ; 
  from 
  the 
  latter 
  

   of 
  which 
  it 
  differs 
  according 
  to 
  his 
  classification 
  by 
  the 
  fifth 
  ventral 
  segment 
  not 
  being 
  

   larger 
  than 
  the 
  others. 
  I 
  find, 
  however, 
  in 
  Macrodactylus 
  that 
  the 
  difference 
  in 
  size 
  

   of 
  the 
  segments 
  is 
  by 
  no 
  means 
  obvious, 
  and 
  I 
  am 
  inclined, 
  therefore, 
  with 
  Burmeister 
  

   to 
  rank 
  the 
  present 
  as 
  a 
  sub-group 
  of 
  Macrodactylidae, 
  verging 
  indeed 
  by 
  the 
  freely 
  

   moving 
  and 
  prehensile 
  claws 
  to 
  the 
  HoplidaB. 
  

  

  Dichelonyciia 
  Kirby, 
  

  

  Our 
  species 
  which 
  have 
  become 
  tolerably 
  numerous 
  may 
  be 
  thus 
  grouped. 
  

   Thorax 
  haud 
  vel 
  vix 
  canaliculars 
  - 
  - 
  I. 
  Sp. 
  1 
  — 
  9. 
  

  

  Thorax 
  valde 
  canaliculars 
  .... 
  - 
  II. 
  9 
  — 
  13. 
  

  

  