﻿South 
  American 
  species 
  of 
  Diahrotica. 
  443 
  

  

  long 
  ; 
  sides 
  obliquely 
  converging 
  from 
  the 
  base 
  to 
  the 
  apex, 
  obso- 
  

   letely 
  bisinuate 
  and 
  angnlate 
  near 
  the 
  middle, 
  the 
  basal 
  angle 
  pro- 
  

   duced, 
  subacute 
  ; 
  above 
  transversely 
  convex, 
  slightly 
  flattened 
  on 
  

   the 
  hinder 
  disk, 
  shining, 
  impunctate. 
  Elytra 
  closely 
  but 
  finely 
  

   punctured. 
  

  

  This 
  species 
  is 
  very 
  variable 
  in 
  the 
  coloration 
  of 
  the 
  

   head 
  and 
  elytra 
  ; 
  the 
  form 
  passes 
  through 
  all 
  the 
  inter- 
  

   mediate 
  degrees 
  from 
  nigro-piceous 
  to 
  flavous. 
  The 
  

   elytra 
  vary 
  equally. 
  I 
  do 
  not 
  possess 
  a 
  specimen 
  exactly 
  

   agreeing 
  with 
  the 
  description 
  given 
  by 
  Olivier, 
  but 
  have 
  

   little 
  doubt 
  that 
  specimens 
  similarly 
  coloured 
  do 
  occur. 
  

   [Baly.] 
  

  

  77. 
  Diahrotica 
  Belemea 
  (Eeiche 
  MS.), 
  sp. 
  n. 
  

  

  Flavo-testacea 
  vel 
  fulva; 
  eapite 
  supra 
  nigra, 
  antennis 
  fascis, 
  

   articulis 
  basalibus 
  brunneis 
  vel 
  flavo-brunneis, 
  articulis 
  7o 
  et 
  80 
  

   albescentibus 
  ; 
  prothorace 
  transverso, 
  ante 
  basin 
  obsolete 
  trans- 
  

   versim 
  depresso, 
  lateribus 
  leviter 
  bisinuatis, 
  disco 
  subtiliter 
  baud 
  

   dense 
  punctiilatis 
  ; 
  elytris 
  crebre 
  punctulatis, 
  nigro-fuscis, 
  limbo 
  

   externo, 
  margine 
  basali, 
  macula 
  utrinque 
  prope 
  basin, 
  fascia 
  trans- 
  

   versa 
  vix 
  pone 
  medium 
  ad 
  suturam 
  angustim 
  interrupta, 
  et 
  macula 
  

   utrinque 
  ante 
  apicem, 
  flavis 
  vel 
  fulvis 
  ; 
  corpore 
  subtus 
  (lateribus 
  

   pospectoris 
  exceptis) 
  femoribusque 
  flavis, 
  tibiis 
  tarsisque 
  infuscatis. 
  

  

  Mas. 
  Articulis 
  antennarum 
  3o, 
  4o 
  et 
  5o 
  leviter 
  crassatis, 
  tibiis 
  

   intermediis 
  leviter 
  curvatis 
  vix 
  ante 
  apicem 
  subtus 
  angulato-dila- 
  

   tato 
  ; 
  articulo 
  primo 
  tarsi 
  antici 
  dilatato 
  et 
  subelongato. 
  Long. 
  

   6 
  — 
  8 
  mm. 
  

  

  Hab. 
  Para 
  (or 
  Belem). 
  

  

  In 
  structural 
  characters 
  this 
  species 
  comes 
  nearest 
  to 
  

   D. 
  spectabilis, 
  Baly, 
  but 
  is 
  easily 
  to 
  be 
  distinguished 
  from 
  

   that 
  species 
  by 
  the 
  colour 
  and 
  marking 
  of 
  the 
  elytra. 
  

   The 
  marking 
  of 
  the 
  elytra 
  is 
  apt 
  to 
  vary, 
  without, 
  how- 
  

   ever, 
  in 
  any 
  case 
  resembling 
  that 
  of 
  spectabilis. 
  In 
  one 
  

   variety 
  the 
  elytra 
  are 
  yellowish, 
  with 
  the 
  suture, 
  the 
  

   extreme 
  apex, 
  and 
  a 
  submarginal 
  vitta, 
  dilated 
  on 
  the 
  

   inner 
  side 
  at 
  its 
  posterior 
  extremity, 
  dark 
  brown. 
  The 
  

   colour 
  of 
  the 
  head 
  is 
  also 
  variable 
  ; 
  in 
  some 
  specimens 
  

   the 
  front 
  is 
  black, 
  and 
  the 
  upper 
  side, 
  except 
  around 
  the 
  

   eyes, 
  testaceous. 
  

  

  78. 
  Diahrotica 
  sjjectabilis, 
  Baly, 
  sp. 
  n. 
  

   Ovata, 
  postice 
  ampliata, 
  convexa, 
  flavo-fulva, 
  nitida, 
  pectore 
  

   capiteque 
  nigris, 
  antennis 
  basi 
  fulvis, 
  articulis 
  octavo 
  et 
  nono 
  totis 
  

  

  