﻿South 
  American 
  species 
  of 
  Diahrotica. 
  427 
  

  

  middle. 
  Elytra 
  strongly 
  and 
  very 
  closely 
  punctured 
  ; 
  dark 
  blue 
  

   or 
  violaceous. 
  Body 
  uuderneatli 
  and 
  femora 
  yellowish, 
  tibiae 
  and 
  

   tarsi 
  black. 
  Each 
  elytron 
  in 
  the 
  male 
  with 
  a 
  short 
  slightly 
  curved 
  

   carina 
  near 
  the 
  suture 
  posteriorly. 
  

  

  34. 
  Diahrotica 
  ornata, 
  Baly. 
  

   Ann. 
  and 
  Mag. 
  Nat. 
  Hist., 
  8rd 
  ser., 
  iv., 
  p. 
  273. 
  

   Hab. 
  Peru. 
  

  

  35. 
  Diahrotica 
  adonis, 
  Baly. 
  

   L. 
  c, 
  p. 
  272. 
  

  

  Hab. 
  Venezuela, 
  Colombia 
  ; 
  also 
  Panama. 
  

  

  36. 
  Diahrotica 
  denotata, 
  Gahan, 
  n.n. 
  

  

  Diahrotica 
  bipartita, 
  Baly, 
  P. 
  Z. 
  S., 
  1889, 
  p. 
  95, 
  nee 
  

   Jacoby, 
  Biologia 
  C. 
  A., 
  p. 
  508. 
  

  

  Oblonga, 
  postice 
  ampliata, 
  convesa, 
  flava, 
  nitida 
  ; 
  capite, 
  scutello 
  

   thoraceque 
  nigris, 
  hoc 
  transversim 
  sulcato, 
  basi 
  piceo 
  margniato 
  ; 
  

   antennis 
  flavis, 
  articulis 
  basali 
  et 
  intermediis 
  nigi-is 
  ; 
  elytris 
  ob- 
  

   longis, 
  postice 
  paiiUo 
  ampliatis, 
  convesis, 
  infra 
  basin 
  excavatis, 
  sat 
  

   crebre 
  punctatis, 
  dimidio 
  antico, 
  margine 
  escepto, 
  viridi-seneo 
  ; 
  

   prope 
  medium 
  fascia 
  elevata 
  et 
  pone 
  fasciam 
  sulco 
  transverso 
  

   viridi-seneo 
  instructis. 
  

  

  Mas. 
  Elytris 
  ante 
  apicem 
  prope 
  suturam, 
  vitta 
  obsolete 
  elevata 
  

   instructis. 
  

  

  Long. 
  4 
  lin. 
  

  

  Hab. 
  Eastern 
  Ecuador 
  {Buckley), 
  

  

  Head 
  trigonate 
  ; 
  antennae 
  with 
  the 
  third 
  joint 
  three 
  times 
  the 
  

   length 
  of 
  the 
  second, 
  scarcely 
  shorter 
  than 
  the 
  fourth; 
  the 
  basal 
  

   joint, 
  together 
  with 
  the 
  fifth, 
  sixth, 
  and 
  seventh, 
  black 
  ; 
  the 
  second 
  

   to 
  the 
  fourth 
  flavous, 
  stained 
  with 
  piceous 
  ; 
  the 
  eighth 
  and 
  following 
  

   ones 
  pale 
  flavous. 
  Thorax 
  twice 
  as 
  broad 
  as 
  long 
  ; 
  sides 
  nearly 
  

   parallel 
  and 
  sinuate 
  from 
  the 
  base 
  to 
  the 
  middle, 
  thence 
  slightly 
  

   converging 
  towards 
  the 
  apex; 
  disk 
  shining, 
  impunctate, 
  impressed 
  

   across 
  the 
  middle 
  with 
  a 
  broad 
  transverse 
  sulcation, 
  which 
  is 
  more 
  

   deeply 
  excavated 
  at 
  either 
  end. 
  Elytra 
  oblong, 
  dilated 
  posteriorly, 
  

   moderately 
  convex, 
  excavated 
  below 
  the 
  basilar 
  space, 
  distinctly 
  

   and 
  rather 
  closely 
  punctured; 
  flavous, 
  the 
  anterior 
  disk 
  (the 
  outer 
  

   mai'gin 
  excepted) 
  , 
  together 
  with 
  a 
  transverse 
  sulcation 
  immediately 
  

   behind 
  the 
  middle, 
  metallic-green 
  ; 
  this 
  sulcation, 
  which 
  extends 
  

  

  