﻿South 
  American 
  species 
  of 
  Diabrotica. 
  435 
  

  

  callum 
  humeralem 
  posita, 
  trigonata, 
  secunda 
  prope 
  medium 
  trans- 
  

   versa, 
  tertiaque 
  pone 
  medium 
  subrotundata, 
  nigris 
  ornatis. 
  

  

  Long. 
  4^ 
  mm. 
  

  

  Hab. 
  Brazil. 
  

  

  Head 
  not 
  longer 
  than 
  broad, 
  triangular 
  ; 
  clypeus 
  smooth, 
  im- 
  

   punctate 
  ; 
  antennae 
  filiform, 
  obsoletely 
  thickened 
  towards 
  the 
  apex, 
  

   the 
  second 
  joint 
  short, 
  ovate, 
  the 
  third 
  nearly 
  twice 
  its 
  length, 
  the 
  

   fourth 
  slightly 
  longer 
  than 
  the 
  third 
  ; 
  the 
  two 
  lower 
  joints 
  glabrous, 
  

   the 
  rest 
  clothed 
  with 
  fuscous 
  hairs. 
  Thorax 
  about 
  one-fourth 
  

   broader 
  than 
  long 
  ; 
  sides 
  broadly 
  margined, 
  nearly 
  straight, 
  and 
  

   very 
  slightly 
  diverging 
  from 
  the 
  base 
  to 
  beyond 
  the 
  middle, 
  thence 
  

   rounded 
  and 
  converging 
  towards 
  the 
  apex, 
  the 
  anterior 
  angles 
  

   rounded, 
  the 
  hinder 
  ones 
  subacute 
  ; 
  above 
  convex, 
  rather 
  abruptly 
  

   deflexed 
  on 
  the 
  sides, 
  flattened 
  on 
  the 
  middle 
  disk, 
  subremotely 
  

   punctured. 
  Elytra 
  ovate, 
  dilated 
  posteriorly, 
  their 
  apices 
  regularly 
  

   rounded 
  above, 
  convex, 
  not 
  depressed 
  below 
  the 
  basilar 
  space, 
  

   rather 
  strongly 
  punctured, 
  the 
  outer 
  limb 
  broad. 
  [Baly.] 
  

  

  61. 
  Diabrotica 
  significata, 
  Gahan, 
  sp. 
  n. 
  

  

  Diabrotica 
  signifera, 
  Chev. 
  MS., 
  nee 
  Jac. 
  

   D. 
  15-maculata 
  (Dej.). 
  

  

  Oblongo-ovata, 
  flava, 
  nitida 
  ; 
  capite 
  obscure 
  rufo 
  ; 
  antennis 
  

   articulo 
  primo 
  flavo, 
  ceteris 
  ferrugineis 
  vel 
  fuscis; 
  prothoraee 
  dorso 
  

   convexo, 
  maculis 
  dtiabus 
  brunneis 
  ornato 
  ; 
  scutello 
  piceo-rufo 
  ; 
  

   elytris 
  flavis, 
  maculis 
  tredecim 
  brunneis 
  — 
  una 
  communi 
  elongata 
  

   pone 
  scutellum, 
  una 
  utrinque 
  ad 
  humerum, 
  duabus 
  utrinque 
  ante, 
  

   duabus 
  pone 
  medium, 
  una 
  minuta 
  utrinque 
  prope 
  apicem 
  ; 
  pro- 
  

   sterno, 
  abdomine 
  pedibusque 
  testaceo-flavis 
  ; 
  peetore 
  ferrugineo 
  

   vel 
  fusco. 
  Long. 
  6 
  mm. 
  

  

  Var. 
  Elytris 
  fere 
  omnino 
  flavis. 
  

  

  Hab. 
  Brazil, 
  Bahia. 
  

  

  Head 
  dark 
  red, 
  somewhat 
  glossy. 
  Antennae 
  with 
  the 
  first 
  joint 
  

   yellow, 
  the 
  remaining 
  joints 
  reddish 
  brown 
  or 
  dai'k 
  brown, 
  with 
  

   the 
  third 
  and 
  following 
  joints 
  subequal, 
  each 
  rather 
  more 
  than 
  

   twice 
  as 
  long 
  as 
  the 
  second. 
  Prothorax 
  a 
  little 
  broader 
  than 
  long, 
  

   yellow, 
  nitid, 
  and 
  marked 
  on 
  the 
  disk 
  with 
  two 
  brownish 
  spots. 
  

   Elytra 
  yellowish, 
  glossy, 
  almost 
  impunctate, 
  with, 
  usually, 
  thirteen 
  

   brownish 
  or 
  reddish 
  brown 
  spots, 
  of 
  which 
  one, 
  common, 
  elongate, 
  

   and 
  spatulate, 
  is 
  placed 
  behind 
  the 
  scutellum, 
  one 
  on 
  each 
  side 
  just 
  

   over 
  the 
  shoulder, 
  two 
  on 
  each 
  side 
  before 
  the 
  middle, 
  which 
  are 
  

   often 
  confluent, 
  two 
  on 
  each 
  side 
  behind 
  the 
  middle, 
  and 
  one 
  very 
  

   small 
  spot 
  close 
  to 
  the 
  suture 
  on 
  each 
  side 
  near 
  the 
  apex. 
  In 
  one 
  

  

  TRANS. 
  ENT, 
  SOC, 
  LOND. 
  1891. 
  PART 
  III. 
  (oCT.) 
  2 
  Q 
  

  

  