﻿On 
  the 
  Ceylonese 
  Species 
  0/ 
  Adoietus. 
  587 
  

  

  LXIX. 
  — 
  On 
  the 
  Ceylonese 
  Species 
  of 
  Etiteh'ne 
  Cohopiera 
  

   belonging 
  to 
  the 
  Genus 
  Adoretus. 
  By 
  GlLBEKT 
  J. 
  

   Arrow. 
  

  

  (Published 
  by 
  permission 
  of 
  the 
  Trustees 
  of 
  the 
  British 
  Museum.) 
  

  

  In 
  my 
  paper 
  on 
  the 
  Kutelinse 
  of 
  Ceylon, 
  published 
  in 
  the 
  

   Ann. 
  & 
  Mag. 
  Nat. 
  Hist, 
  for 
  September 
  1911, 
  I 
  enumerated 
  

   thirty-one 
  species 
  in 
  all, 
  but 
  reserved 
  the 
  genus 
  Adoretus 
  for 
  

   further 
  consideration 
  later. 
  Previous 
  to 
  the 
  publication 
  of 
  

   that 
  paper 
  only 
  a 
  single 
  species 
  of 
  the 
  genus 
  had 
  been 
  

   recorded 
  from 
  tlie 
  island. 
  Fourteen 
  are 
  now 
  known 
  to 
  me, 
  of 
  

   which 
  one 
  very 
  widely 
  distributed 
  species, 
  A. 
  versutus, 
  Har., 
  

   is 
  the 
  only 
  one 
  certainly 
  occurring 
  elsewhere. 
  The 
  list 
  of 
  

   species 
  will 
  no 
  doubt 
  be 
  considerably 
  increased 
  yet, 
  for 
  the 
  

   genus 
  is 
  evidently 
  peculiarly 
  well 
  represented 
  in 
  Ceylon, 
  

   although, 
  owing 
  to 
  tlie 
  generally 
  nocturnal 
  habits 
  of 
  the 
  

   insects 
  and 
  their 
  inconspicuous 
  colouring 
  and 
  aspect, 
  they 
  

   have 
  received 
  little 
  attention. 
  Although 
  never 
  of 
  very 
  

   brilliant 
  or 
  attractive 
  appearance, 
  some 
  of 
  the 
  largest 
  and 
  

   most 
  striking 
  members 
  of 
  this 
  enormous 
  genus, 
  with 
  the 
  

   exception 
  of 
  some 
  inhabiiing 
  the 
  Madagascan 
  Region, 
  are 
  to 
  

   be 
  found 
  in 
  Ceylon. 
  Tliey 
  are 
  destructive 
  insects, 
  devouring 
  

   the 
  leaves 
  of 
  roses, 
  cannas, 
  and 
  other 
  cultivated 
  plants. 
  

  

  The 
  following 
  is 
  the 
  list 
  of 
  the 
  Ceylonese 
  species 
  at 
  present 
  

   known 
  : 
  — 
  

  

  " 
  Trigonostoma 
  nana,'''' 
  Walker, 
  attributed 
  to 
  Adoretus 
  in 
  

   the 
  Munich 
  Catalogue, 
  is 
  a 
  species 
  oi 
  Apogonia. 
  

  

  The 
  types 
  of 
  the 
  new 
  species 
  here 
  following 
  are 
  in 
  the 
  

   British 
  Museum. 
  Most 
  of 
  the 
  species 
  were 
  found 
  by 
  

   Mr. 
  E. 
  E. 
  Green. 
  

  

  Adoretus 
  bicaudatus, 
  sp. 
  n. 
  

  

  Brunneus, 
  dense 
  griseo-setosus, 
  elytrorum 
  areis 
  denudatis 
  et 
  densius 
  

   tectis 
  longitudinaliter 
  alternantibus 
  ; 
  pygidio 
  ante 
  apicem 
  bi- 
  

   penicillato 
  ; 
  minutus, 
  angustus, 
  toto 
  dense 
  punctatus, 
  opacus, 
  

   pedibus 
  posticis 
  brevibus, 
  crassis. 
  

  

  Long. 
  8-10 
  mm. 
  ; 
  lat. 
  3-5-5 
  mm. 
  

  

  