﻿62 
  Mr. 
  J. 
  O. 
  Westwood 
  0?/ 
  

  

  VII. 
  Trogid;e. 
  (Mctathoracis 
  epimera 
  obtecta. 
  Jnlcnme 
  

   clava 
  globulosa 
  perfoliata. 
  Abdomen 
  segmentis 
  ventralibus 
  5.) 
  

   Thus 
  divided 
  : 
  — 
  

  

  I. 
  Die 
  Augen 
  ungetheilt. 
  

  

  A. 
  Die 
  Fiihlerkeule 
  einfach 
  durcbblattert. 
  

   Genera 
  1 
  . 
  Trox, 
  F. 
  

  

  2. 
  Omorgus, 
  Er.* 
  

  

  3. 
  Cryptogenius, 
  Westw. 
  Trans. 
  Ent. 
  Soc. 
  iv. 
  169. 
  

  

  B. 
  Das 
  erste 
  glied 
  der 
  fiihlerkeule 
  napfFormig, 
  die 
  folgenden 
  

   iimschliessend. 
  

  

  Genera 
  1. 
  Ana'ides, 
  Westw., 
  Trans. 
  Ent. 
  Soc. 
  iv. 
  107. 
  

  

  2. 
  Chcetodus, 
  Westw., 
  ib. 
  165.f 
  

  

  3. 
  Lij)aroc/irits, 
  Erichson 
  (see 
  post). 
  

  

  II. 
  Die 
  Augen 
  durch 
  den 
  einspringenden 
  Kopfrand 
  unvollstandig 
  

  

  getheilt. 
  

   Genera. 
  Sph(jeromorpltus, 
  Synarmostes, 
  Ciocotus 
  and 
  Acantho- 
  

   ceriis, 
  MacLeay. 
  See 
  Germar's 
  Memoir 
  on 
  these 
  

   genera 
  in 
  the 
  Zcitschrift 
  f. 
  d. 
  Entomol. 
  iv. 
  

  

  This 
  separation 
  of 
  the 
  Gcotmpidcs 
  into 
  two 
  families, 
  Geotrupid<B 
  

   and 
  Hyhosoridce, 
  and 
  of 
  the 
  Trogidce 
  also 
  into 
  two 
  families, 
  

   Orphnidce 
  and 
  Trogidce, 
  is 
  an 
  evident 
  improvement. 
  I 
  cannot 
  

   however 
  but 
  think 
  that 
  the 
  variation 
  in 
  the 
  number 
  of 
  segments 
  

   in 
  the 
  abdomen 
  is 
  a 
  character 
  of 
  too 
  slight 
  importance 
  to 
  be 
  em- 
  

   ployed 
  as 
  the 
  distinctive 
  mark 
  of 
  the 
  higher 
  divisions 
  in 
  families. 
  

  

  • 
  Omorgus 
  (Er. 
  Arch. 
  f. 
  Nat. 
  13 
  Jahrg. 
  1 
  Bd, 
  p. 
  Ill) 
  is 
  a 
  dismemberment 
  

   from 
  tlie 
  genus 
  Troi, 
  ciiaraclerized 
  thus: 
  — 
  " 
  Ligula 
  prominula 
  cornea. 
  Palpi 
  

   labiales 
  articulo 
  Imo 
  longiore 
  2do. 
  Maxillarum 
  m.ala 
  interior 
  uncis 
  duobus 
  corneis 
  

   armaia, 
  inferiore 
  simplici, 
  superiore 
  bifido. 
  Prolhorax 
  baud 
  ciliatus 
  :" 
  it 
  is 
  

   divided 
  into 
  two 
  sections 
  : 
  A, 
  with 
  the 
  scutellum 
  hastate 
  and 
  the 
  hind 
  tibia; 
  un- 
  

   armed, 
  Tr. 
  squalidus, 
  01. 
  verrucosus, 
  K. 
  Australasia:, 
  Latr., 
  &c. 
  ; 
  and 
  B, 
  with 
  the 
  

   scutellum 
  oblong, 
  and 
  the 
  hind 
  tibiae 
  armed 
  with 
  small 
  spines. 
  Six 
  South 
  American 
  

   species, 
  one 
  wingless, 
  Tr. 
  bidlatus, 
  Curtis, 
  the 
  others 
  winged, 
  Tr. 
  brevicolUs, 
  Er. 
  

   (leprosus, 
  Dej.) 
  &c. 
  

  

  Phohenis, 
  MacLeay, 
  (Horse 
  Ent. 
  i. 
  137,) 
  founded 
  on 
  Tr. 
  horridus, 
  Fab., 
  a 
  

   Cape 
  of 
  Good 
  Hope 
  species, 
  is 
  overlooked 
  by 
  Erichson 
  in 
  his 
  list 
  of 
  genera 
  of 
  

   TrpgidiB. 
  It 
  is 
  described 
  by 
  iVlacLeay 
  " 
  scutello 
  baud 
  dislincto." 
  The 
  scutellum 
  

   is, 
  however, 
  distinct 
  enough 
  in 
  two 
  specimens 
  in 
  my 
  Collection. 
  

  

  t 
  The 
  characters 
  employed 
  by 
  Dr. 
  Erichson 
  to 
  distinguish 
  his 
  primary 
  divisions 
  

   and 
  families 
  are, 
  I 
  think, 
  fully 
  proved 
  to 
  be 
  unsatisfactory 
  and 
  unnatural, 
  when 
  we 
  

   see 
  ChcRtodus 
  removed 
  from 
  Silphodcs, 
  Apalouychus, 
  &c. 
  (amongst 
  Erichson's 
  Hy- 
  

   bosoridce) 
  and 
  arranged 
  far 
  apart 
  from 
  the 
  preceding 
  in 
  the 
  family 
  of 
  Trogidce. 
  

   A 
  comparison 
  of 
  the 
  structural 
  details 
  of 
  Silphodes 
  and 
  Chalodus, 
  given 
  in 
  plate 
  XI. 
  

   of 
  the 
  fourth 
  volume 
  of 
  our 
  Transactions, 
  will, 
  I 
  think, 
  convince 
  every 
  one 
  of 
  the 
  

   extremely 
  intimate 
  relation 
  of 
  these 
  two 
  genera. 
  

  

  