﻿426 
  Mr. 
  Charles 
  J. 
  Gaban 
  on 
  the 
  

  

  Hah. 
  Ecuador; 
  banks 
  of 
  tbe 
  Napo 
  Eiver 
  {Buckley). 
  

  

  Head 
  triangiilar, 
  not 
  longer 
  than 
  broad 
  ; 
  clypeus 
  with 
  a 
  narrow 
  

   elevated 
  ridge, 
  wliich 
  extends 
  downwards 
  rather 
  below 
  the 
  middle, 
  

   and 
  there 
  terminates 
  on 
  a 
  broad 
  ill-defined 
  elevation, 
  which 
  

   extends 
  obliquely 
  outwards 
  on 
  either 
  side 
  ; 
  the 
  sm-face 
  above 
  this 
  

   transverse 
  elevation 
  granulose, 
  subremotely 
  pmictm^ed, 
  the 
  space 
  

   below 
  shining, 
  impunctate 
  ; 
  antennae 
  rather 
  shorter 
  than 
  the 
  body, 
  

   robust 
  in 
  the 
  ^ 
  , 
  rather 
  more 
  slender 
  in 
  the 
  other 
  sex, 
  filiform, 
  the 
  

   four 
  upper 
  joints 
  slightly 
  thickened 
  in 
  the 
  ^; 
  the 
  second 
  joint 
  

   short, 
  obconic 
  ; 
  the 
  third 
  more 
  than 
  twice 
  its 
  length, 
  scarcely 
  

   shorter 
  than 
  the 
  fourth 
  ; 
  black, 
  the 
  four 
  upper 
  joints 
  yellowish 
  

   white. 
  Thorax 
  nearly 
  twice 
  as 
  bi'oad 
  as 
  long; 
  sides 
  broadly 
  mar- 
  

   gined, 
  deeply 
  sinuate 
  behind 
  the 
  middle, 
  rounded 
  and 
  slightly 
  

   dilated 
  anteriorly, 
  converging 
  towards 
  the 
  apex, 
  the 
  anterior 
  and 
  

   posterior 
  angles 
  obtuse 
  ; 
  upper 
  surface 
  abruptly 
  deflexed 
  on 
  the 
  

   sides, 
  flattened 
  and 
  broadly 
  excavated 
  on 
  the 
  disk 
  ; 
  the 
  excavation 
  

   impressed 
  with 
  a 
  shallow 
  ill-defined 
  fovea 
  on 
  either 
  side, 
  in 
  some 
  

   specimens 
  is 
  also 
  a 
  third 
  fovea, 
  small 
  and 
  ill-defined 
  ; 
  this 
  fovea 
  is 
  

   often 
  entirely 
  obsolete. 
  Scutellum 
  triangular, 
  its 
  apex 
  acute. 
  

   Elytra 
  narrowly 
  oblong, 
  very 
  slightly 
  dilated 
  posteriorly, 
  their 
  

   apices 
  conjointly, 
  rather 
  obtusely 
  roimded 
  ; 
  above 
  convex, 
  not 
  

   excavated 
  below 
  the 
  basilar 
  space, 
  closely 
  and 
  strongly 
  punctured, 
  

   the 
  interspaces 
  rugulose, 
  irregularly 
  and 
  transversely 
  wrinkled 
  on 
  

   the 
  middle 
  disk; 
  on 
  each 
  elytron 
  in 
  the 
  S" 
  , 
  placed 
  towards 
  the 
  

   apex 
  near 
  the 
  suture, 
  is 
  a 
  strongly 
  raised, 
  slightly 
  cm'ved, 
  longi- 
  

   tudinal 
  ridge, 
  the 
  middle 
  of 
  which 
  is 
  occupied 
  by 
  a 
  large 
  obtuse 
  

   tuberosity 
  ; 
  the 
  space 
  between 
  the 
  two 
  ridges 
  concave, 
  shining, 
  

   impunctate. 
  [Baly.] 
  

  

  33. 
  Diabrotica 
  azureipennis, 
  Gaban, 
  sp. 
  n. 
  

  

  Viahrotica 
  azureipennis 
  (Dej.). 
  

  

  Flavo-testacea, 
  capite 
  antennis 
  (articulis 
  tribus 
  ultimis 
  albidis 
  

   exceptis) 
  tibiis 
  tarsisque 
  nigris, 
  elytris 
  cyaneis 
  vel 
  violaceis 
  ; 
  pro- 
  

   thoracis 
  dorso 
  transversim 
  impresso, 
  nitido, 
  vix 
  punctate 
  ; 
  elytris 
  

   fortiter 
  confertissimeque 
  punctatis. 
  Long. 
  6 
  — 
  7 
  mm. 
  

  

  Hah. 
  Cayenne. 
  

  

  Head 
  black, 
  with 
  the 
  under 
  side 
  and 
  palpi 
  yellowish. 
  Antennas 
  

   black, 
  with 
  the 
  last 
  three 
  joints 
  whitish 
  ; 
  fourth 
  joint 
  almost 
  as 
  

   long 
  as 
  the 
  second 
  and 
  third 
  imited 
  ; 
  the 
  third 
  twice 
  as 
  long 
  as 
  the 
  

   second. 
  Protliorax 
  nearly 
  twice 
  as 
  broad 
  as 
  long 
  ; 
  sides 
  smuate 
  

   and 
  slightly 
  diverging 
  from 
  the 
  base 
  to 
  beyond 
  the 
  middle, 
  thenco 
  

   converging 
  to 
  the 
  apex 
  ; 
  disk 
  with 
  a 
  transverse 
  depression 
  m 
  the 
  

  

  