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  XI. 
  On 
  the 
  Lamellicorn 
  Beetles 
  which 
  possess 
  exserted 
  

   Mandibles 
  and 
  Lahrum, 
  and 
  lO-jointed 
  Antennce. 
  Being 
  

   a 
  Supplement 
  to 
  a 
  Memoir 
  published 
  in 
  the 
  Fourth 
  Volume 
  

   of 
  the 
  Transactions 
  of 
  the 
  Entomological 
  Society. 
  By 
  

   J. 
  O. 
  Westwood, 
  Esq., 
  F.L.S., 
  &c. 
  

  

  [Read 
  7lh 
  June, 
  1852.] 
  

  

  During 
  the 
  ten 
  years 
  which 
  have 
  elapsed 
  since 
  my 
  paper 
  upon 
  

   those 
  genera 
  of 
  Lamellicorn 
  beetles 
  which 
  agree 
  in 
  possessing 
  

   exserted 
  mandibles 
  and 
  labrura, 
  and 
  10-jointed 
  antennae, 
  was 
  pre- 
  

   sented 
  to 
  the 
  Entomological 
  Society, 
  I 
  have 
  neglected 
  no 
  oppor- 
  

   tunity 
  of 
  searching 
  for 
  any 
  additional 
  allied 
  types 
  of 
  form 
  not 
  

   contained 
  in 
  that 
  communication, 
  and 
  have 
  now 
  the 
  pleasure 
  of 
  

   laying 
  before 
  the 
  Society 
  descriptions 
  and 
  figures 
  of 
  several 
  new 
  

   genera 
  and 
  species 
  by 
  way 
  of 
  supplement 
  to 
  my 
  former 
  memoir. 
  

  

  With 
  respect 
  to 
  the 
  distribution 
  of 
  the 
  Lamellicorn 
  insects 
  into 
  

   families, 
  a 
  highly 
  important 
  modification 
  of 
  the 
  views 
  of 
  Latreille 
  

   and 
  MacLeay 
  has 
  been 
  published 
  by 
  the 
  late 
  Dr. 
  Erichson, 
  in 
  his 
  

   work 
  upon 
  the 
  Coleoptera 
  of 
  Germany 
  (Naturgeschichte 
  der 
  In- 
  

   secten 
  Deutschlands, 
  pp. 
  563, 
  717). 
  We 
  here 
  find 
  the 
  Lamclli- 
  

   cornia 
  (including 
  the 
  Lucanidtv) 
  divided 
  into 
  two 
  primary 
  groups. 
  

   The 
  first 
  (corresponding 
  with 
  MacLeay's 
  Thalerophaga, 
  with 
  the 
  

   addition 
  of 
  the 
  Dynast'idce 
  and 
  the 
  exclusion 
  of 
  the 
  Glaphyridce) 
  

   named 
  

  

  ScARAB^lDES 
  PLEUROSTICTI. 
  

  

  {Ligulu 
  mcnto 
  connata. 
  Spiracula 
  ahdominalia 
  2 
  — 
  6 
  in 
  seg- 
  

   mentorum 
  ventralium 
  parte 
  dorsali 
  sita, 
  septimum 
  liberum. 
  

   Scgmentum 
  pemdtiinum 
  dorsale 
  ventraleque 
  connata. 
  Larvce 
  

   maxillarum 
  malis 
  connatis) 
  — 
  

  

  And 
  containing 
  the 
  families 
  Dynastidce, 
  Cetoniidce, 
  Rulelidce, 
  

  

  and 
  Melolonthidce 
  (with 
  the 
  Anoplognathidce). 
  

  

  The 
  second 
  primary 
  division 
  is 
  named 
  

  

  SCARAB^IDES 
  LArAROSTICTI. 
  

  

  (Ligula 
  a 
  mento 
  discreta. 
  Spiracula 
  abdominalia 
  inter 
  segmenta 
  

   ventralia 
  dorsaliaque 
  sita, 
  omnia 
  ab 
  elytris 
  obtecla. 
  Larvce 
  

   maxillarum 
  malis 
  discretis.) 
  

  

  It 
  will 
  be 
  at 
  once 
  perceived 
  that 
  the 
  three 
  characters 
  upon 
  

   which 
  these 
  divisions 
  are 
  founded 
  involve 
  important 
  physiological 
  

  

  