﻿274 
  LECONTE.- 
  SYNOPSIS 
  OF 
  THE 
  

  

  The 
  head 
  is 
  hardly 
  one-fourth 
  narrower 
  than 
  the 
  thorax, 
  which 
  differs 
  remarkably 
  

   in 
  form 
  from 
  that 
  of 
  any 
  other 
  species 
  in 
  the 
  group, 
  in 
  not 
  being 
  conspicuously 
  

   narrowed 
  in 
  front. 
  The 
  under 
  surface 
  is 
  coarsely 
  punctured, 
  more 
  sparsely 
  at 
  the 
  

   middle 
  of 
  the 
  metosternum 
  ; 
  the 
  punctures 
  support 
  very 
  short 
  hairs. 
  

  

  5. 
  SERIC2E. 
  

  

  This 
  group 
  is 
  readily 
  known 
  from 
  all 
  the 
  others 
  by 
  the 
  labrum 
  being 
  connate 
  with 
  

   the 
  clypeus, 
  and 
  very 
  frequently 
  indistinct 
  ; 
  in 
  addition, 
  the 
  anterior 
  coxae 
  are 
  conical 
  

   and 
  prominent 
  ; 
  the 
  abdominal 
  segments 
  are 
  hardly 
  connate, 
  the 
  penultimate 
  dorsal 
  and 
  

   ventral 
  are 
  separated 
  by 
  a 
  straight 
  suture, 
  and 
  the 
  stigma 
  is 
  concealed 
  in 
  the 
  anterior 
  

   angle. 
  

  

  The 
  genus 
  Serica 
  M'Leay, 
  the 
  only 
  one 
  found 
  in 
  our 
  territory, 
  belongs 
  to 
  the 
  divi- 
  

   sion 
  of 
  genuine 
  Sericse, 
  having 
  the 
  posterior 
  coxce 
  dilated, 
  and 
  the 
  ligula 
  corneous 
  and 
  

   connate 
  with 
  the 
  men 
  turn 
  ; 
  it 
  may 
  be 
  thus 
  separated 
  into 
  two 
  groups 
  : 
  

  

  A. 
  Clypeus 
  utrinque 
  acute 
  incisus 
  ; 
  corpus 
  haud 
  micans. 
  Sp. 
  1 
  — 
  4. 
  Camptorhina 
  KirLy. 
  

  

  B. 
  Clypeus 
  simplex 
  ; 
  corpus 
  sericeo-inicans. 
  Sp. 
  5 
  — 
  15. 
  Serica 
  (proper). 
  

  

  Serica 
  M'Leay. 
  

   A. 
  

  

  1. 
  S. 
  vespertina, 
  oblongo-ovata, 
  convexa 
  picea 
  nitida, 
  margine 
  breviter 
  fimbriata, 
  clypeo 
  densius, 
  

  

  capite 
  thoraceque 
  sat 
  dense 
  punctatis, 
  fronte 
  transversim 
  impresso, 
  elytris 
  sulcatis, 
  sulcis 
  in 
  fundo 
  

  

  confluenter 
  fortiter 
  punctatis, 
  interstitiis 
  parce 
  punctatis. 
  Long. 
  -35 
  — 
  -42. 
  

   Dej. 
  Cat.; 
  Leconte, 
  Agassiz' 
  Lake 
  Superior, 
  226. 
  

  

  Melolontha 
  vespertina 
  Schonh. 
  Syn. 
  Ins. 
  Append. 
  94 
  ; 
  Say, 
  Journ. 
  Acad. 
  Nat. 
  Sc. 
  3, 
  244. 
  

   Omaloplia 
  vespertina 
  Harris, 
  Ins. 
  Inj. 
  Vegetation, 
  2nd 
  ed. 
  29. 
  

   Serica 
  vespertina 
  Burni. 
  Lamell. 
  2, 
  2nd, 
  175. 
  

   Camptorhina 
  atricapilla 
  Kirby, 
  Fauna. 
  Bor. 
  Am. 
  129. 
  

  

  Middle, 
  Southern, 
  Eastern 
  and 
  Western 
  States, 
  as 
  far 
  as 
  Lake 
  Superior. 
  

  

  2. 
  S. 
  t 
  e 
  x 
  a 
  n 
  a 
  , 
  oblonga 
  convexa, 
  testacea 
  margine 
  breviter 
  fimbriata, 
  olypeo 
  confertim 
  punctato, 
  ad 
  

  

  apicem 
  truncate, 
  paulo 
  magis 
  producto, 
  capite 
  parce, 
  thorace 
  subtilius 
  sat 
  dense 
  punctato, 
  elytris 
  

   sulcatis, 
  sulcis 
  in 
  fundo 
  punctatis, 
  interstitiis 
  puuctis 
  paucis 
  notatis. 
  Long. 
  -32. 
  

  

  Found 
  at 
  Fort 
  Gates, 
  Texas, 
  by 
  Mr. 
  H. 
  Haldeman. 
  This 
  species 
  is 
  smaller 
  than 
  

   the 
  preceding, 
  and 
  less 
  dilated 
  behind 
  ; 
  the 
  clypeus 
  is 
  longer, 
  the 
  lateral 
  incisure 
  of 
  

   the 
  anterior 
  part 
  is 
  not 
  so 
  deep, 
  the 
  thorax 
  is 
  more 
  convex 
  and 
  more 
  finely 
  punctured, 
  

   and 
  the 
  elytra 
  are 
  less 
  punctured. 
  

  

  3. 
  S. 
  atratula, 
  oblongo-ovata, 
  piceo-nigra, 
  margine 
  vix 
  breviter 
  fimbriata, 
  clypeo 
  confertim 
  punctato 
  

  

  antice 
  truncate, 
  fronte 
  transversim 
  impressa, 
  capite 
  parcius, 
  thorace 
  densius 
  punctato, 
  elytris 
  profundius 
  

  

  sulcatis, 
  sulcis 
  in 
  fundo 
  punctatis, 
  antennis 
  palpisque 
  rufo-flavis. 
  Long. 
  -26. 
  

   One 
  specimen 
  from 
  Texas, 
  Mr. 
  H. 
  Haldeman. 
  Differs 
  from 
  the 
  preceding 
  by 
  the 
  

   more 
  ovate 
  body 
  dilated 
  behind, 
  by 
  the 
  transversely 
  impressed 
  front, 
  the 
  more 
  strongly 
  

   punctured 
  thorax, 
  and 
  more 
  deeply 
  sulcate 
  elytra. 
  The 
  clypeus, 
  as 
  in 
  S. 
  texana, 
  is 
  

   less 
  deeply 
  incised 
  at 
  the 
  side 
  than 
  in 
  S. 
  vespertina, 
  d 
  

  

  