﻿South 
  American 
  species 
  of 
  Diabrotica. 
  425 
  

  

  80. 
  Diabrotica 
  Erichsoni, 
  Baly. 
  

  

  Ami. 
  and 
  Mag. 
  Nat. 
  Hist., 
  3rd 
  ser., 
  iv., 
  p. 
  272 
  (1859). 
  

  

  Elongata, 
  postice 
  paullo 
  ampliata, 
  modice 
  convexa, 
  fulva 
  aut 
  

   rofo-fulva, 
  nitida, 
  capite 
  antennisque, 
  articulis 
  ultimis 
  quatuor 
  

   exceptis, 
  nigris 
  ; 
  thorace 
  trifoveolato, 
  fovea 
  intermedia 
  pai'va 
  ; 
  ely- 
  

   tris 
  oblongis, 
  modice 
  convexis, 
  medio 
  late 
  transversim 
  depressis, 
  

   crebre 
  punctatis, 
  subnigulosis, 
  obsolete 
  tricostatis, 
  his 
  costis 
  inter- 
  

   dum 
  totis 
  obsoletis 
  ; 
  plumbeis 
  aut 
  sordide 
  viridi-seneis, 
  limbo 
  

   externo 
  flavo. 
  

  

  Mas. 
  Elytris 
  utrisque 
  creta 
  elevata, 
  leviter 
  curvata 
  ante 
  apicem 
  

   prope 
  sutm^am 
  posita. 
  

  

  Hab. 
  Ecuador 
  ; 
  banks 
  of 
  the 
  Napo, 
  Upper 
  Amazons. 
  

  

  Head 
  longer 
  than 
  broad, 
  wedge-shaped 
  ; 
  clypeus 
  with 
  a 
  faint 
  

   longitudinal 
  ridge, 
  which 
  extends 
  downwards 
  nearly 
  to 
  the 
  apical 
  

   margin 
  ; 
  antennae 
  filiform, 
  obsoletely 
  thickened 
  towards 
  the 
  apex, 
  

   four-fifths 
  the 
  length 
  of 
  the 
  body, 
  the 
  four 
  outer 
  joints 
  yellowish 
  

   white. 
  Thorax 
  nearly 
  twice 
  as 
  broad 
  as 
  long 
  ; 
  sides 
  sinuate 
  behind 
  

   the 
  middle, 
  rounded 
  and 
  slightly 
  converging 
  anteriorly 
  ; 
  above 
  

   convex, 
  disk 
  broadly 
  excavated, 
  trifoveolate, 
  the 
  middle 
  fovea 
  

   much 
  smaller 
  than 
  the 
  others. 
  Elytra 
  oblong, 
  very 
  slightly 
  

   dilated 
  posteriorly, 
  their 
  apices 
  conjointly 
  regularly 
  rounded; 
  

   above 
  moderately 
  convex, 
  faintly 
  depressed 
  transversely 
  across 
  

   the 
  middle, 
  finely 
  rugulose, 
  closely 
  punctured 
  ; 
  on 
  the 
  middle 
  disk 
  

   of 
  each 
  elytron 
  are 
  three 
  very 
  fine 
  ill-defined 
  longitudinal 
  costse, 
  

   which 
  in 
  some 
  specimens 
  are 
  entirely 
  obsolete. 
  [Baly.] 
  

  

  31. 
  Diabrotica 
  Batesi, 
  Baly. 
  

   Ann. 
  and 
  Mag. 
  Nat. 
  Hist., 
  3rd 
  ser., 
  iv., 
  1859, 
  p. 
  271. 
  

   Hab. 
  Amazons, 
  

  

  32. 
  Diabrotica 
  vespertina, 
  Baly. 
  

  

  Ann. 
  and 
  Mag. 
  Nat. 
  Hist., 
  3rd 
  ser., 
  iv., 
  p. 
  271. 
  

  

  Elongata, 
  postice 
  paullo 
  ampliata 
  convexa, 
  fulvo-flava, 
  nitida, 
  

   capite 
  nigro 
  ; 
  antennis 
  apice 
  albidis, 
  scutello 
  nigro-piceo 
  ; 
  thorace 
  

   quam 
  longo 
  fere 
  duplo 
  latiori 
  disco 
  late 
  excavata 
  utrinque 
  magis 
  

   fortiter 
  excavato 
  ; 
  elytris 
  oblongis, 
  viridiscente 
  purpureo-metallicis, 
  

   crebre 
  et 
  fortiter 
  punctatis, 
  rugulosis. 
  

  

  Mas. 
  Antennarum 
  articulis 
  quatuor 
  leviter 
  incrassitis 
  ; 
  elytris 
  

   utrisque 
  ante 
  apicem 
  prope 
  suturam 
  erecta 
  elevata 
  medio 
  torulosa 
  

   instructis. 
  

  

  Long. 
  4 
  — 
  5 
  lin. 
  

  

  