﻿454 
  Mr. 
  Charles 
  J. 
  Gahan 
  on 
  the 
  

  

  one 
  on 
  either 
  side 
  the 
  central 
  disk, 
  larger 
  and 
  subrotundate. 
  

   Elj^tra 
  ovate, 
  dilated 
  posteriorly, 
  regularly 
  rounded 
  at 
  the 
  apex, 
  

   convex, 
  not 
  excavated 
  below 
  the 
  basilar 
  space, 
  coarsely- 
  and 
  irre- 
  

   gularly 
  punctured, 
  their 
  interspaces 
  irregularly 
  rugulose 
  ; 
  surface 
  

   on 
  the 
  sides 
  and 
  towards 
  the 
  apex 
  sparingly 
  clothed 
  with 
  fine 
  sub- 
  

   erect 
  hairs, 
  visible 
  only 
  under 
  a 
  lens. 
  [Baly.] 
  

  

  96. 
  Diabrotica 
  zonula, 
  Baly. 
  

  

  P. 
  Z. 
  S., 
  1889, 
  p. 
  92. 
  

  

  Sat 
  late 
  ovata, 
  postice 
  ampliata, 
  modice 
  convexa, 
  nigra, 
  nitida, 
  

   antennis 
  extrorsum 
  albidis, 
  thorace 
  flavo-fulvo, 
  obsolete 
  bifoveo- 
  

   lato 
  ; 
  elytris 
  distinct 
  minus 
  crebre 
  punctatis, 
  limbo 
  externo, 
  apice 
  

   paullo 
  ampliato, 
  fasciaque 
  prope 
  medium 
  flavo-fulvis. 
  

  

  Long. 
  6.T 
  mm. 
  

  

  Hah. 
  Ecuador 
  (BucMey). 
  

  

  Head 
  scarcely 
  longer 
  than 
  broad, 
  triangular 
  ; 
  clj'peus 
  convex, 
  

   the 
  longitudinal 
  ridge 
  obsolete 
  ; 
  antenuse 
  slender, 
  filiform, 
  the 
  

   second 
  joint 
  short, 
  oval, 
  the 
  third 
  twice 
  its 
  length, 
  the 
  fourth 
  

   slightly 
  but 
  distinctly 
  longer 
  than 
  the 
  third; 
  the 
  four 
  upper 
  joints 
  

   yellowish 
  white, 
  the 
  rest 
  black. 
  Thorax 
  nearly 
  twice 
  as 
  broad 
  as 
  

   long 
  ; 
  sides 
  nearly 
  parallel 
  and 
  slightly 
  sinuate 
  from 
  the 
  base 
  to 
  

   just 
  beyond 
  the 
  middle, 
  thence 
  slightly 
  converging 
  obliquely 
  

   towards 
  the 
  apex, 
  anterior 
  angles 
  obtuse, 
  the 
  hinder 
  ones 
  shghtly 
  

   produced, 
  subacute 
  ; 
  disk 
  transversely 
  convex, 
  the 
  middle 
  disk 
  

   faintly 
  impressed 
  on 
  either 
  side 
  with 
  a 
  large, 
  very 
  shallow, 
  fovea. 
  

   Elytra 
  rather 
  strongly 
  dilated 
  posteriorly, 
  moderately 
  convex, 
  

   faintly 
  excavated 
  on 
  the 
  siiture, 
  rather 
  strongly 
  but 
  not 
  closely 
  

   punctured. 
  [Baly.] 
  

  

  97. 
  Diabrotica 
  unifasciata, 
  Baly. 
  

  

  P.Z.S., 
  1889, 
  p. 
  92. 
  

  

  Late 
  ovata, 
  postice 
  ampliata, 
  modice 
  convexa, 
  dorso 
  sub- 
  

   deplanata, 
  nigra, 
  nitida, 
  thorace 
  obsolete 
  bifoveolato, 
  albido 
  ; 
  elj'- 
  

   tris 
  tenuiter 
  remote 
  punctatis, 
  limbo 
  externo 
  apice 
  distmcte 
  

   ampliato, 
  fasciaque 
  prope 
  medium 
  albidis. 
  

  

  Long. 
  6^ 
  mm. 
  

  

  Hab. 
  Peru, 
  Chancliamayo. 
  

  

  Head 
  not 
  longer 
  than 
  broad, 
  triangular 
  ; 
  clypeus 
  slightly 
  exca- 
  

   vated 
  on 
  either 
  side, 
  its 
  medial 
  with 
  an 
  elevated 
  ridge 
  ; 
  antennae 
  

   filiform, 
  the 
  second 
  joint 
  short, 
  ovate, 
  the 
  third 
  twice 
  the 
  length 
  of 
  

   the 
  second, 
  the 
  third 
  and 
  fourth 
  nearly 
  equal. 
  Thorax 
  twice 
  as 
  

   broad 
  as 
  long 
  ; 
  sides 
  rather 
  broadly 
  margined, 
  straight 
  and 
  parallel 
  

  

  