﻿South 
  American 
  si^ecies 
  of 
  Diahrotica. 
  419 
  

  

  3. 
  Diahrotica 
  Fairmairei, 
  Baly. 
  

   Hab. 
  Peru; 
  Mexico. 
  

  

  4. 
  Diahrotica 
  consimilis, 
  Baly. 
  

  

  Trans. 
  Ent. 
  Soc. 
  Lond., 
  1886, 
  p. 
  447. 
  

  

  Hah. 
  Ecuador, 
  and 
  Peru. 
  

  

  This 
  species 
  is 
  very 
  nearly 
  allied 
  to 
  D. 
  Fairmairei, 
  

   Baly. 
  It 
  may 
  be 
  doubted 
  whether 
  the 
  differences 
  are 
  

   more 
  than 
  varietal. 
  In 
  D. 
  consimilis 
  the 
  head 
  is 
  black, 
  

   the 
  antennas 
  are 
  dark 
  brown 
  except 
  at 
  the 
  extreme 
  base 
  ; 
  

   the 
  flavous 
  dorsal 
  vitta 
  of 
  each 
  elytron 
  covers 
  only 
  the 
  

   third 
  costa, 
  which 
  is 
  somewhat 
  broader 
  than 
  the 
  others. 
  

   In 
  D. 
  Fairmairei 
  the 
  head 
  and 
  antennae 
  are 
  reddish, 
  the 
  

   former 
  sometimes 
  with 
  a 
  violaceous 
  or 
  chalybeous 
  tint 
  ; 
  

   the 
  dorsal 
  flavous 
  vitta 
  of 
  each 
  elytron 
  covers 
  not 
  only 
  

   the 
  third 
  costa, 
  but 
  also 
  the 
  two 
  rows 
  of 
  punctures 
  on 
  

   each 
  side 
  of 
  it. 
  The 
  dorsal 
  vitta 
  is 
  consequently 
  broader, 
  

   but 
  the 
  third 
  costa 
  itself 
  is 
  scarcely 
  broader 
  in 
  Fairmairei 
  

   than 
  in 
  consimilis. 
  

  

  5. 
  Diahrotica 
  alhidovittata, 
  Baly. 
  

  

  Proc. 
  Zool. 
  Soc, 
  1889, 
  p. 
  95. 
  

  

  Ovata, 
  postice 
  paiillo 
  ampliata, 
  convexa, 
  nigro-picea, 
  nitida, 
  

   femoribus 
  basi 
  flavis, 
  capite 
  thoraceque 
  piceo-rufis, 
  antennis 
  nigris, 
  

   articulis 
  octavo 
  nonoque 
  albidis 
  ; 
  tliorace 
  profunde 
  bifoveolato 
  ; 
  

   elytris 
  piceo-nigris, 
  subnitidis, 
  elevato-vittatis, 
  costa 
  tertia 
  a 
  sutura 
  

   qtiam 
  casteris 
  latiore 
  utrisqiie 
  limbo 
  externo 
  costaque 
  tertia 
  albidis 
  

   apice 
  confluentibus. 
  

  

  Long. 
  3 
  lin. 
  

  

  Hah. 
  Brazil, 
  St. 
  Catharina. 
  

  

  Head 
  triangular, 
  not 
  longer 
  than 
  broad 
  ; 
  clypeus 
  with 
  a 
  strongly 
  

   raised 
  longitudinal 
  ridge, 
  which 
  runs 
  downwards 
  to 
  join 
  the 
  

   thickened 
  anterior 
  margin 
  ; 
  antennae 
  three-foiu"ths 
  the 
  length 
  of 
  

   the 
  body, 
  filiform, 
  the 
  second 
  joint 
  short, 
  obovate, 
  the 
  third 
  and 
  

   fourth 
  equal, 
  each 
  twice 
  the 
  length 
  of 
  the 
  second; 
  black, 
  the 
  

   eighth 
  and 
  ninth 
  joints, 
  and 
  in 
  some 
  specimens 
  the 
  lower 
  three- 
  

   fourths 
  of 
  the 
  tenth, 
  white. 
  Thorax 
  nearly 
  one-half 
  broader 
  than 
  

   long; 
  sides 
  rounded 
  anteriorly, 
  siniiate 
  behind 
  the 
  middle, 
  the 
  

   hinder 
  and 
  anterior 
  angles 
  obtuse, 
  the 
  former 
  prominent 
  ; 
  above 
  

   convex, 
  the 
  disk 
  deeply 
  bifoveolate, 
  Elytra 
  oblong-ovate, 
  dilated 
  

   posteriorly, 
  regularly 
  rounded 
  conjointly 
  at 
  their 
  apices, 
  convex 
  ; 
  

  

  TRANS. 
  ENT. 
  SOC. 
  LOND, 
  1891. 
  — 
  PAET 
  III. 
  (OCT.; 
  2 
  F 
  

  

  