﻿South 
  American 
  species 
  of 
  Diabrotica. 
  423 
  

  

  23. 
  Diabrotica 
  cognata, 
  Baly. 
  

   P.Z. 
  S., 
  1889, 
  p. 
  93. 
  

  

  Late 
  ovate, 
  postice 
  sat 
  valde 
  ampliata, 
  convexa, 
  dorso 
  sub- 
  

   depressa 
  fixlva, 
  nitida, 
  pectore, 
  scutello 
  capiteque 
  nigris 
  ; 
  thorace 
  

   transverse, 
  fortiter 
  punctato, 
  disco 
  profunde 
  bifoveolato 
  ; 
  elytris 
  

   rude 
  at 
  profixnde 
  subseriato-punctatis, 
  utrisque 
  tricostatis, 
  nigris, 
  

   limbo 
  externo 
  Mvo, 
  tibiis 
  anticis 
  quatuor 
  dorso, 
  tarsisque 
  quatuor 
  

   anticis 
  piceo-tinctis. 
  

   Long. 
  9 
  mm. 
  

  

  Hah. 
  Ecuador 
  (Buckley). 
  

  

  Head 
  scarcely 
  longer 
  than 
  broad, 
  triangular, 
  black, 
  the 
  jaws 
  and 
  

   palpi 
  piceo-fulvous 
  ; 
  clyjpeus 
  with 
  a 
  strongly 
  raised 
  longitudinal 
  

   ridge, 
  sides 
  granulose-punctate 
  ; 
  antennae 
  four-fifths 
  the 
  length 
  of 
  

   body, 
  slender, 
  filiform, 
  the 
  second 
  joint 
  short, 
  subovate, 
  the 
  third 
  

   three 
  times 
  its 
  length, 
  the 
  fourth 
  as 
  long 
  as 
  the 
  third. 
  Thorax 
  

   twice 
  as 
  broad 
  as 
  long 
  ; 
  sides 
  deeply 
  sinuate, 
  and 
  diverging 
  from 
  

   the 
  base 
  to 
  beyond 
  the 
  middle, 
  thence 
  rounded 
  to 
  the 
  apex, 
  anterior 
  

   and 
  posterior 
  angles 
  produced, 
  the 
  former 
  obtuse, 
  the 
  latter 
  sub- 
  

   acute 
  : 
  upper 
  surface 
  strongly 
  but 
  not 
  very 
  closely 
  punctured, 
  

   impressed 
  scarcely 
  behind 
  the 
  middle 
  with 
  two 
  large 
  deep 
  foves 
  ; 
  

   the 
  space 
  between 
  slightly 
  depressed. 
  Elytra 
  with 
  the 
  sides 
  

   gradually 
  dilated 
  from 
  the 
  base 
  to 
  the 
  posterior 
  angle, 
  their 
  apices 
  

   conjointly 
  regularly 
  rounded 
  ; 
  above 
  convex 
  on 
  the 
  sides^ 
  flattened 
  

   along 
  the 
  suture, 
  coarsely 
  and 
  strongly 
  subseriate-punctate 
  ; 
  each 
  

   elytron 
  with 
  three 
  strongly 
  raised 
  longitudinal 
  costte, 
  which 
  extend 
  

   from 
  the 
  base 
  nearly 
  to 
  the 
  apex. 
  [Baly.] 
  

  

  24. 
  Diabrotica 
  rugata, 
  Baly. 
  

  

  Ann. 
  and 
  Mag. 
  Nat. 
  Hist., 
  5tli 
  ser., 
  vol. 
  iii. 
  (1879), 
  

   p. 
  84. 
  

  

  Hah. 
  Ecuador. 
  

  

  25. 
  Diabrotica 
  coryphcEa, 
  Baly. 
  

  

  Diabrotica 
  corypJiisa, 
  Baly, 
  Journ. 
  Linn. 
  Soc, 
  xix., 
  

  

  p. 
  283. 
  

   D. 
  puncticollis, 
  var., 
  Kirsch., 
  Berl. 
  Ent. 
  Zeit., 
  xxvii. 
  

  

  (1883), 
  p. 
  203. 
  

  

  Hab. 
  Colombia. 
  

  

  26. 
  Diabrotica 
  viridipennis, 
  Jacoby. 
  

   Cist. 
  Ent., 
  ii., 
  p. 
  526. 
  

   Hah. 
  Peru. 
  

  

  