﻿60 
  Mr. 
  J. 
  O. 
  Westwood 
  on 
  

  

  considerations, 
  and 
  are 
  therefore 
  entitled 
  to 
  more 
  weight 
  than 
  

   merely 
  artificial 
  characters, 
  — 
  such 
  as 
  the 
  number 
  of 
  joints 
  in 
  the 
  

   antennse 
  or 
  the 
  number 
  of 
  spines 
  on 
  the 
  tibiae. 
  The 
  separation 
  

   or 
  junction 
  of 
  the 
  ligula 
  (or 
  labium) 
  with 
  the 
  mentum 
  of 
  the 
  

   perfect 
  insect, 
  as 
  well 
  as 
  the 
  separate 
  or 
  connate 
  condition 
  of 
  the 
  

   lobes 
  of 
  the 
  maxillae 
  of 
  the 
  larvae, 
  are 
  of 
  course 
  intimately 
  con- 
  

   nected 
  with 
  the 
  nature 
  of 
  the 
  food 
  of 
  the 
  insect, 
  whilst 
  the 
  posi- 
  

   tion 
  of 
  the 
  spiracles 
  of 
  the 
  abdomen 
  in 
  the 
  imago 
  intimates 
  cor- 
  

   responding 
  variations 
  in 
  the 
  nature 
  of 
  the 
  residence 
  or 
  relative 
  

   exposure 
  to 
  the 
  air 
  of 
  the*perfect 
  insect. 
  

  

  The 
  Scarabceides 
  laparosticti 
  are 
  divided 
  into 
  two 
  groups, 
  cor- 
  

   responding 
  with 
  the 
  remaining 
  families 
  of 
  the 
  Linnaean 
  Scarahcei 
  

   and 
  the 
  Linnaean 
  Lucani.* 
  

  

  The 
  following 
  is 
  Erichson's 
  plan 
  of 
  distribution 
  of 
  the 
  Scara- 
  

   baeideous 
  portion 
  of 
  the 
  Laparosticti 
  : 
  — 
  

  

  A. 
  Abdomen 
  with 
  six 
  ventral 
  semisegments. 
  

   a. 
  Epimera 
  of 
  the 
  metathorax 
  free. 
  

  

  I. 
  Glaphyrid^. 
  Epimera 
  metathoracis 
  libera. 
  Antennce 
  

   10 
  vel 
  9 
  articulatse. 
  Abdomen 
  segmentis 
  ventralibus 
  6 
  liberis. 
  

  

  Genera 
  Glaphyrtis, 
  Amphicoma, 
  &c., 
  with 
  Aclopus, 
  Er., 
  and 
  the 
  

   remarkable 
  Australian 
  genus 
  Phcenogtiatha 
  of 
  Hope, 
  described 
  

   and 
  figured 
  in 
  the 
  fourth 
  volume 
  of 
  our 
  Transactions, 
  p. 
  113, 
  

   pi. 
  VI. 
  fig. 
  5, 
  as 
  forming 
  a 
  natural 
  transition 
  to 
  the 
  Hybosoridce.-f 
  

  

  II. 
  Hybosorid^. 
  Die 
  fiihler 
  10-gliedrig. 
  Die 
  bauch-halbringe 
  

   mit 
  Ausnahme 
  des 
  letzten, 
  mit 
  einander 
  fast 
  verwachsen. 
  

  

  Genera 
  1. 
  Hybosorus, 
  MacLeay. 
  

  

  2. 
  Silphodes, 
  Westw., 
  Trans. 
  Ent. 
  Soc. 
  iv. 
  160 
  ; 
  Atimus, 
  

  

  Dej. 
  ; 
  Phceochrus, 
  Lap. 
  J 
  

  

  3. 
  Coilodes, 
  Westw. 
  Trans. 
  Ent. 
  Soc. 
  iv. 
  1C3.§ 
  

  

  4. 
  Dlcraeodon, 
  Erichson;]! 
  Chcetodus 
  basalts, 
  Westw. 
  

  

  Trans. 
  Ent. 
  Soc. 
  iv. 
  1G6. 
  

  

  * 
  Notwithstanding 
  the 
  relations 
  involved 
  in 
  the 
  employment 
  of 
  Erichson's 
  

   primary 
  characters, 
  I 
  cannot 
  but 
  think 
  that 
  the 
  views 
  of 
  Linnaeus 
  and 
  Latreilie, 
  in 
  

   dividing 
  the 
  Lamellicorns 
  into 
  two 
  groups, 
  Scarubceus 
  and 
  Lucamis, 
  are 
  to 
  be 
  pre- 
  

   ferred 
  to 
  those 
  of 
  Erichson. 
  

  

  \ 
  Phanognatha 
  appears 
  to 
  me 
  to 
  be 
  much 
  more 
  nearly 
  related 
  to 
  Pachypus, 
  

   whicii 
  Dr. 
  Erichson 
  places 
  in 
  the 
  family 
  MelolonthidcB. 
  

  

  i 
  Erichson 
  adopts 
  Laporte's 
  name 
  for 
  this 
  genus. 
  The 
  names 
  however 
  of 
  

   genera, 
  so 
  slovenly 
  characterized 
  as 
  not 
  to 
  be 
  recognizable, 
  are 
  no 
  better 
  than 
  IMS. 
  

   or 
  catalogue 
  names, 
  and 
  must 
  give 
  way 
  to 
  names 
  attached 
  to 
  correct 
  detailed 
  de- 
  

   scriptions 
  and 
  full 
  accompanying 
  figures. 
  

  

  § 
  Erichson 
  hypercrilically 
  has 
  altered 
  this 
  name 
  to 
  Coelodes, 
  

  

  II 
  The 
  type 
  of 
  this 
  genus 
  is 
  the 
  insect 
  which 
  1 
  described 
  under 
  the 
  name 
  of 
  

  

  