﻿444 
  Mr. 
  Charles 
  J. 
  Gahan 
  on 
  the 
  

  

  decimoque 
  basi 
  albidis 
  ; 
  tibiis 
  tarsisque 
  nigi'o-piceis 
  ; 
  thorace 
  

   quam 
  longo 
  fere 
  duplo 
  latiori, 
  convexo, 
  laevi 
  ; 
  elytris 
  rude 
  punc- 
  

   tatis, 
  subnitidis, 
  nigris, 
  utrisque 
  maculis 
  duabus 
  infra 
  basin 
  trans- 
  

   versim 
  positis, 
  una 
  ante 
  apicem, 
  lineaque 
  transversa 
  props 
  medium, 
  

   utrinqxie 
  abbreviata 
  albidis. 
  

  

  Mas. 
  Antennarum 
  articulis 
  tertio 
  ad 
  quintum 
  elongatis, 
  inter 
  

   se 
  sequalibus, 
  leviter 
  incrassatis 
  ; 
  tibiis 
  intermediis 
  curvatis, 
  apice 
  

   incrassatis, 
  obtusis. 
  

  

  Long. 
  8| 
  mm. 
  

  

  Hab. 
  Upper 
  Amazons, 
  Nauta 
  (Bates). 
  

  

  Head 
  not 
  longer 
  than 
  broad, 
  triangular, 
  black, 
  the 
  cheeks 
  and 
  

   mouth 
  flavous 
  ; 
  clypeus 
  with 
  a 
  strongly 
  elevated 
  longitudinal 
  ridge 
  ; 
  

   antennee 
  in 
  the 
  ^ 
  [the 
  only 
  sex 
  known 
  to 
  me) 
  shghtly 
  exceeding 
  

   the 
  body 
  in 
  length; 
  the 
  second 
  joint 
  short, 
  subovate, 
  the 
  three 
  

   following 
  ones 
  equal, 
  slightly 
  thickened, 
  cyhndrical, 
  each 
  more 
  

   than 
  twice 
  as 
  long 
  as 
  the 
  second, 
  the 
  sixth 
  to 
  the 
  eleventh 
  shorter 
  

   and 
  more 
  slender, 
  equal 
  to 
  each 
  other 
  in 
  length; 
  the 
  basal 
  joint 
  

   piceous, 
  the 
  seventh, 
  eight, 
  and 
  basal 
  portion 
  of 
  the 
  ninth 
  yel- 
  

   lowish 
  white, 
  the 
  rest 
  black. 
  Thorax 
  nearly 
  twice 
  as 
  broad 
  as 
  long 
  

   at 
  the 
  base 
  ; 
  sides 
  nearly 
  parallel 
  and 
  faintly 
  sinuate 
  from 
  the 
  base 
  

   to 
  the 
  middle, 
  thence 
  very 
  slightly 
  and 
  obliquely 
  converging 
  

   towards 
  the 
  apex, 
  the 
  anterior 
  angles 
  slightly 
  produced, 
  obtuse, 
  

   the 
  hinder 
  ones 
  acute 
  ; 
  upper 
  surface 
  transversely 
  convex, 
  very 
  

   slightly 
  flattened 
  on 
  the 
  hinder 
  portion 
  of 
  the 
  middle, 
  minutely 
  

   but 
  not 
  closely 
  punctured 
  ; 
  sides 
  rather 
  abruptly 
  deflexed. 
  Elytra 
  

   oblong, 
  slightly 
  dilated 
  posteriorly, 
  regularly 
  rounded 
  at 
  the 
  apex 
  ; 
  

   above 
  convex, 
  rather 
  coarsely 
  punctured, 
  the 
  interspaces 
  sub- 
  

   rugulose. 
  

  

  Separated 
  from 
  D. 
  10-guttata 
  by 
  the 
  more 
  slender 
  

   antennae, 
  and 
  by 
  the 
  apices 
  of 
  the 
  intermediate 
  pair 
  of 
  

   tibiae 
  being 
  obtuse, 
  not 
  acuminate. 
  I 
  only 
  know 
  two 
  

   specimens, 
  both 
  males, 
  from 
  the 
  Upper 
  Amazons. 
  

   [Baly.] 
  

  

  79. 
  Diabrotica 
  conformis, 
  sp. 
  n. 
  

  

  Capite 
  supra 
  nigro, 
  subtus 
  testaceo 
  ; 
  antennis 
  fuscis, 
  articulis 
  

   60 
  ad 
  Sum 
  albescentibus 
  ; 
  prothorace 
  transverse, 
  sat 
  dense 
  sub- 
  

   tiliterque 
  punctulato, 
  testaceo 
  ; 
  elytris 
  crebre 
  punctulatis, 
  sub- 
  

   nitidis, 
  nigris, 
  utrisque 
  marguie 
  basali 
  et 
  maculis 
  tribus 
  (una 
  ante 
  

   medium, 
  una 
  vix 
  pone 
  medium, 
  tertia 
  prope 
  apicem) 
  flavo-albe- 
  

   scentibus 
  ; 
  corpore 
  subtus 
  (post-pectore 
  excepto) 
  fulvo 
  ; 
  tibiis 
  

   tarsisque 
  et 
  apicibus 
  femorum 
  quatuor 
  posteriorum, 
  infuscatis. 
  

  

  Long. 
  6 
  — 
  7 
  mm. 
  

  

  