﻿446 
  Mr. 
  Charles 
  J. 
  Gahan 
  on 
  the 
  

  

  long; 
  sides 
  very 
  slightly 
  converging 
  from 
  the 
  base 
  to 
  the 
  middle, 
  

   thence 
  more 
  strongly 
  converging 
  and 
  sinuate 
  towards 
  the 
  apex, 
  the 
  

   anterior 
  and 
  posterior 
  angles 
  produced, 
  the 
  former 
  thickened, 
  

   obtuse, 
  the 
  latter 
  subacute 
  ; 
  upper 
  surface 
  transversely 
  convex, 
  

   obsoletely 
  excavated 
  on 
  the 
  hinder 
  disk, 
  impressed 
  subremotely 
  

   with 
  large 
  shallow 
  punctures. 
  Elytra 
  oblong, 
  slightly 
  dilated 
  

   posteriorly, 
  regularly 
  rounded 
  at 
  the 
  apices, 
  convex, 
  distinctly 
  

   punctured, 
  the 
  interstices 
  smooth. 
  [Baly.] 
  

  

  81. 
  Diabrotica 
  nigrovittulata, 
  Baly. 
  

   Journ. 
  Linn. 
  Soc, 
  xix., 
  p. 
  242. 
  

   Hah. 
  Colombia, 
  Venezuela. 
  

  

  Mr. 
  Baly 
  described 
  this 
  species 
  from 
  a 
  single 
  male 
  

   specimen 
  from 
  Colombia, 
  but 
  he 
  has 
  omitted 
  some 
  im- 
  

   portant 
  characters 
  of 
  this 
  sex, 
  viz. 
  : 
  Antennfe 
  with 
  the 
  

   third, 
  fourth, 
  and 
  fifth 
  joints 
  somewhat 
  thickened, 
  the 
  

   fifth 
  joint 
  nearly 
  twice 
  as 
  long 
  as 
  the 
  sixth. 
  Inter- 
  

   mediate 
  femora 
  with 
  a 
  small 
  tubercle 
  on 
  the 
  under 
  side 
  

   just 
  below 
  the 
  middle 
  ; 
  intermediate 
  tibiae 
  somewhat 
  

   dilated 
  from 
  the 
  middle 
  up 
  to 
  the 
  apex, 
  with 
  the 
  ventral 
  

   side 
  somewhat 
  angulate 
  at 
  the 
  point 
  where 
  the 
  dilatation 
  

   begins. 
  

  

  The 
  bands 
  on 
  the 
  elytra 
  in 
  this 
  species 
  are 
  subject 
  to 
  

   variation. 
  In 
  a 
  specimen 
  from 
  Venezuela 
  the 
  posterior 
  

   median 
  vitta 
  is 
  wanting, 
  and 
  the 
  two 
  external 
  vittse 
  of 
  

   each 
  elytron 
  are 
  united 
  to 
  form 
  one 
  long 
  submarginal 
  

   black 
  band. 
  A 
  second 
  specimen 
  from 
  Colombia 
  differs 
  

   from 
  the 
  type 
  in 
  having 
  the 
  three 
  anterior 
  bands 
  united 
  

   behind, 
  while 
  a 
  broadtransversefascia 
  joins 
  the 
  anterior 
  

   ends 
  of 
  the 
  three 
  posterior 
  vitfcse. 
  

  

  82. 
  Diahrotica 
  paraensis, 
  Baly. 
  

  

  Trans. 
  Ent. 
  Soc. 
  Lond,, 
  1886, 
  p. 
  452. 
  

  

  Mr. 
  Baly 
  has 
  not 
  mentioned 
  the 
  following 
  characters 
  

   of 
  the 
  male 
  : 
  — 
  Antennae 
  with 
  the 
  third, 
  fourth, 
  and 
  fifth 
  

   joints 
  somewhat 
  thickened. 
  Intermediate 
  femora 
  each 
  

   with 
  a 
  small 
  tubercle 
  on 
  the 
  under 
  side 
  at 
  about 
  the 
  

   beginning 
  of 
  the 
  distal 
  third. 
  Intermediate 
  tibife 
  angu- 
  

   late 
  on 
  the 
  under 
  side 
  above 
  the 
  middle, 
  and 
  from 
  thence 
  

   dilated 
  as 
  far 
  as 
  the 
  apex. 
  

  

  