﻿418 
  Mr. 
  Charles 
  J. 
  Gahan 
  o)i 
  the 
  

  

  M. 
  Bather 
  broadly 
  ovate, 
  distinctly 
  dilated 
  posteriorly. 
  Elytra 
  with 
  

   basal 
  half 
  or 
  third 
  part 
  fulvous, 
  the 
  posterior 
  part 
  black 
  or 
  

   blue. 
  

   a. 
  Elytra 
  with 
  posterior 
  dark 
  part 
  opaque. 
  Species 
  131 
  — 
  134. 
  

   aa. 
  Elytra 
  with 
  posterior 
  dark 
  part 
  nitid. 
  Species 
  135 
  — 
  137. 
  

  

  N. 
  Ovate, 
  dilated 
  posteriorly. 
  Elytra 
  usually 
  fulvous 
  or 
  yellowish, 
  with 
  

   black 
  i^lagte. 
  Each 
  elytron 
  in 
  the 
  male 
  of 
  some 
  of 
  the 
  

   species 
  with 
  a 
  distinct 
  tubercle 
  placed 
  close 
  to 
  the 
  suture 
  a 
  

   little 
  before 
  the 
  apex. 
  

  

  a. 
  Prothorax 
  black. 
  

  

  b. 
  Each 
  elytron 
  with 
  two 
  plagte 
  or 
  spots, 
  one 
  near 
  the 
  base, 
  the 
  

  

  other 
  post-median. 
  Species 
  139, 
  140. 
  

   bb. 
  Elytra 
  with 
  two 
  irregular 
  common 
  black 
  bands. 
  Species 
  141. 
  

   aa. 
  Prothorax 
  yellowish 
  or 
  fulvous. 
  

  

  c. 
  Each 
  elytron 
  with 
  two 
  black 
  plagas 
  or 
  spots. 
  Species 
  142 
  — 
  144. 
  

   cc. 
  Each 
  elytron 
  with 
  two 
  basal 
  spots 
  and 
  a 
  large 
  post-median 
  spot 
  

  

  or 
  plaga 
  black. 
  Species 
  145. 
  

  

  ccc. 
  Elytra 
  with 
  the 
  apex 
  broadly 
  and 
  a 
  common 
  basal 
  spot 
  black. 
  

   Species 
  146. 
  

  

  cccc. 
  Elytra 
  with 
  two 
  large 
  apical 
  plagse 
  conjoined 
  at 
  the 
  suture, 
  with- 
  

   out 
  basal 
  spot. 
  Species 
  147. 
  

  

  0. 
  Broadly 
  ovate. 
  Elytra 
  strongly 
  dilated. 
  

  

  a. 
  Prothorax 
  yellowish, 
  with 
  two 
  black 
  spots. 
  Elytra 
  yellowish 
  

   white, 
  each 
  with 
  a 
  subsutural 
  and 
  a 
  submarginal 
  black 
  vitta. 
  

   Species 
  148. 
  

   aa. 
  Prothorax 
  wholly 
  yellowish. 
  Elytra 
  black, 
  with 
  a 
  broad 
  outer 
  

   limb 
  slightly 
  dilated 
  at 
  the 
  apex, 
  yellowish. 
  Species 
  149. 
  

   aaa. 
  Prothorax 
  black. 
  Elytra 
  strongly 
  convex, 
  entirely 
  bright 
  me- 
  

   tallic-green. 
  Species 
  150. 
  

  

  P. 
  Species 
  that 
  may 
  be 
  distinguished 
  by 
  the 
  peculiar 
  structure 
  of 
  the 
  

   antennae 
  of 
  the 
  male. 
  

   a. 
  Antennfe 
  with 
  the 
  3rd 
  and 
  6th 
  joints 
  thickened 
  and 
  peculiarly 
  

   shaped. 
  Species 
  151. 
  

   aa. 
  Antennfe 
  with 
  the 
  last 
  four 
  joints 
  dilated, 
  the 
  8th 
  and 
  9th 
  more 
  

   strongly 
  so 
  than 
  the 
  two 
  last. 
  Species 
  152. 
  

   aaa. 
  Antennas 
  with 
  the 
  last 
  three 
  joints 
  very 
  strongly 
  thickened 
  in 
  the 
  

   form 
  of 
  a 
  club. 
  Species 
  153. 
  

   aaaa. 
  Antennas 
  with 
  the 
  last 
  two 
  joints 
  elongated 
  and 
  considerably 
  

   dilated. 
  Species 
  154. 
  

  

  1. 
  Diahrotica 
  corusca, 
  Harold. 
  

  

  Coleopt., 
  Hefte 
  xiii. 
  (1875), 
  p. 
  92 
  ; 
  Bal}^ 
  Journ. 
  Linn. 
  

   Soc, 
  xix., 
  p. 
  230. 
  

  

  Hah. 
  Colombia 
  ; 
  also 
  Mexico, 
  

  

  2. 
  Diahrotica 
  inniiha, 
  Fabr. 
  

  

  Syst. 
  Ent., 
  p. 
  117; 
  Baly, 
  Journ. 
  Linn. 
  Soc, 
  xix., 
  

   p. 
  230. 
  

  

  Hah. 
  Colombia, 
  Ca_ycnne 
  ; 
  West 
  Indies, 
  Mexico, 
  and 
  

   North 
  America. 
  

  

  