﻿420 
  Mr. 
  Charles 
  J. 
  Gaban 
  on 
  the 
  

  

  each 
  elytron 
  with 
  eight 
  strongly 
  raised 
  costae, 
  the 
  third 
  from 
  the 
  

   suture 
  broader 
  than 
  the 
  rest. 
  [Baly.] 
  

  

  6. 
  Diahrotica 
  venalis, 
  Erichs. 
  

  

  Archiv. 
  fiir 
  Naturgeschichte, 
  1847, 
  i., 
  p. 
  169. 
  

  

  Hab. 
  Peru. 
  

  

  Blackish 
  brown. 
  Head 
  and 
  prothorax 
  reddish 
  testaceous, 
  the 
  

   latter 
  smooth 
  and 
  glossy, 
  -with 
  two 
  foveolate 
  impressions 
  just 
  

   behind 
  the 
  middle 
  of 
  the 
  disk. 
  Elytra 
  dark 
  brown, 
  with 
  the 
  costae 
  

   not 
  very 
  strongly 
  raised, 
  with 
  the 
  lateral 
  border 
  and 
  a 
  dorsal 
  

   stripe 
  (embracing 
  the 
  third 
  costa 
  only) 
  of 
  each 
  elytron 
  flavous. 
  

   Antennae 
  with 
  the 
  three 
  (or 
  four) 
  basal 
  joints 
  testaceous, 
  the 
  

   remaining 
  joints 
  black. 
  Legs 
  brownish, 
  with 
  the 
  basal 
  half 
  or 
  

   two-thirds 
  of 
  the 
  femora 
  flavous. 
  

  

  From 
  inmiba, 
  Fabr., 
  which 
  it 
  most 
  nearly 
  resembles, 
  

   this 
  species 
  may 
  be 
  distinguished 
  by 
  the 
  testaceous 
  

   head, 
  the 
  black 
  antennae 
  with 
  only 
  three 
  or 
  four 
  of 
  the 
  

   basal 
  joints 
  testaceous, 
  and 
  by 
  the 
  broader 
  third 
  costa 
  

   of 
  the 
  elytra. 
  The 
  dorsal 
  yellow 
  vitta 
  embraces 
  only 
  

   the 
  third 
  costa 
  in 
  venalis, 
  while 
  in 
  innnha 
  it 
  covers 
  both 
  

   the 
  second 
  and 
  third 
  costae, 
  which 
  are 
  equal 
  in 
  width. 
  

  

  7. 
  Diahrotica 
  cornnta, 
  Baly. 
  

   Trans. 
  Ent. 
  Soc. 
  Lond., 
  1886, 
  p. 
  448. 
  

   Hab. 
  Peru 
  ; 
  Guatemala, 
  Mexico. 
  

  

  8. 
  Diabrotica 
  semifemorata, 
  sp. 
  n. 
  

  

  Diabrotica 
  semifemorata, 
  Chev. 
  MS. 
  

  

  Hab. 
  Bolivia. 
  

  

  Black. 
  Prothorax 
  nitid, 
  with 
  two 
  distinct 
  foveolate 
  impressions 
  

   on 
  the 
  hinder 
  half 
  of 
  the 
  disk. 
  Elytra 
  with 
  feebly 
  raised 
  costae 
  ; 
  

   black, 
  with 
  the 
  lateral 
  limb 
  and 
  a 
  dorsal 
  stripe, 
  embracing 
  the 
  

   broad 
  third 
  costa 
  of 
  each, 
  flavous. 
  Antennae 
  black, 
  with 
  the 
  basal 
  

   three 
  joints 
  underneath, 
  the 
  eighth 
  whollj^, 
  and 
  the 
  basal 
  half 
  of 
  

   the 
  ninth, 
  flavous. 
  Legs 
  black, 
  with 
  the 
  basal 
  half 
  of 
  the 
  femora 
  

   flavous. 
  

  

  This 
  species 
  resembles 
  D. 
  cornnta, 
  Baly, 
  but 
  is 
  to 
  be 
  

   distinguished 
  by 
  the 
  colour 
  of 
  the 
  head 
  (black), 
  legs, 
  

   and 
  antennae, 
  and 
  by 
  the 
  less 
  strongly 
  raised 
  costae 
  of 
  

   the 
  elytra. 
  Uncertain 
  of 
  tbe 
  sex 
  of 
  the 
  single 
  specimen 
  

  

  