﻿( 
  521 
  ) 
  

  

  XXIV. 
  On 
  the 
  South 
  Avierican 
  species 
  of 
  Diabrotica. 
  

   Appendix. 
  By 
  Charles 
  J. 
  Gahan, 
  M.A., 
  F.E.S., 
  

   Assistant 
  in 
  the 
  Zoological 
  Department, 
  British 
  

   Museum. 
  

  

  [Bead 
  November 
  4th, 
  1891.] 
  

  

  The 
  following 
  list 
  contains 
  the 
  names 
  of 
  species, 
  a 
  few 
  

   of 
  which, 
  through 
  oversight, 
  have 
  been 
  omitted 
  from 
  

   the 
  lists 
  given 
  by 
  Mr. 
  Baly 
  and 
  myself, 
  but 
  the 
  great 
  

   majority 
  of 
  which 
  have 
  been 
  reserved 
  for 
  treatment 
  in 
  

   this 
  Appendix. 
  It 
  can 
  be 
  readily 
  understood 
  that 
  many 
  

   of 
  the 
  older 
  descriptions, 
  either 
  from 
  their 
  brevity 
  or 
  

   their 
  want 
  of 
  structural 
  detail, 
  do 
  not 
  admit 
  of 
  the 
  exact 
  

   determination 
  of 
  the 
  species 
  upon 
  which 
  they 
  were 
  

   based. 
  The 
  difficulty 
  becomes 
  all 
  the 
  greater 
  in 
  a 
  group 
  

   like 
  the 
  present, 
  in 
  which 
  many 
  of 
  the 
  species 
  have 
  the 
  

   closest 
  resemblance 
  in 
  colour 
  and 
  markings, 
  but 
  differ 
  by 
  

   structural 
  characters, 
  such 
  as 
  the 
  relative 
  lengths 
  of 
  the 
  

   joints 
  of 
  the 
  antennae, 
  the 
  form 
  of 
  the 
  tibiae, 
  the 
  puuctu- 
  

   ation 
  of 
  the 
  elytra, 
  &c. 
  These 
  descriptions 
  are 
  in 
  some 
  

   cases, 
  however, 
  sufficiently 
  detailed 
  to 
  enable 
  me 
  to 
  give 
  

   the 
  position 
  of 
  the 
  species 
  with 
  a 
  near 
  approach 
  to 
  

   accuracy. 
  Some 
  of 
  the 
  names 
  must 
  take 
  priority 
  of 
  

   those 
  given 
  by 
  Mr. 
  Baly, 
  who 
  had 
  probably 
  been 
  unable 
  

   to 
  see 
  the 
  original 
  descriptions. 
  Where 
  the 
  name 
  of 
  a 
  

   species 
  is 
  not 
  followed 
  by 
  a 
  note, 
  it 
  may 
  be 
  understood 
  

   that 
  I 
  could 
  not 
  form 
  any 
  conclusion 
  as 
  to 
  its 
  identity. 
  

  

  D. 
  ahdominalis, 
  Jacoby, 
  Cist. 
  Ent., 
  ii. 
  (1879), 
  p. 
  525. 
  

   (Sect. 
  2. 
  Probably 
  nearest 
  allied 
  to 
  D. 
  dimi- 
  

   diata, 
  Baly). 
  Peru. 
  

  

  D. 
  ahnipta, 
  Fabr., 
  Syst. 
  Eleuth., 
  i., 
  p. 
  453 
  ; 
  Oliv., 
  

   Ent., 
  vi., 
  p. 
  653, 
  t. 
  4, 
  fig. 
  68. 
  (? 
  =-D. 
  confra- 
  

   terna, 
  Baly. 
  Sect. 
  1, 
  No. 
  104).* 
  Amer. 
  mer. 
  

  

  ■■'• 
  The 
  mimber 
  after 
  a 
  species 
  signifies 
  that 
  it 
  bears 
  that 
  number 
  

   in 
  either 
  Mr. 
  Baly's 
  paper 
  on 
  the 
  species 
  of 
  Section 
  1, 
  or 
  my 
  paper 
  

   on 
  the 
  species 
  of 
  Section 
  2. 
  

  

  TRANS. 
  ENT. 
  SOC. 
  LOND. 
  1891. 
  — 
  PART 
  IV. 
  (DEC.) 
  2 
  N 
  

  

  