﻿New 
  Genera 
  and 
  Species 
  of 
  Curculionides. 
  177 
  

  

  pale 
  hairs 
  ar6 
  scattered 
  over 
  the 
  thighs, 
  and 
  longer 
  pale 
  hairs 
  are 
  

   seenin 
  tolerable 
  abundance 
  on 
  the 
  tibiee 
  and 
  tarsi; 
  at 
  the 
  apex 
  of 
  

   the 
  tibiae 
  they 
  are 
  very 
  dense. 
  The 
  'spongy 
  substance 
  on 
  the 
  

   underside 
  of 
  the 
  tarsi 
  is 
  dusky 
  brown 
  on 
  the 
  two 
  basal 
  joints, 
  and 
  

   yellowish 
  on 
  the 
  penultimate 
  joint. 
  The 
  tibiae 
  are 
  distinctly 
  den- 
  

   ticulated 
  within. 
  The 
  claws 
  are 
  of 
  moderate 
  size, 
  simple 
  and 
  

   diverging. 
  

  

  Leptoslethus 
  IValtoni. 
  

   Oblongus, 
  niger, 
  squamulis 
  pallidis 
  flavescentibus 
  vestitus 
  ; 
  

  

  femoribus 
  rufis 
  ; 
  rostro 
  apice 
  sub-gibboso, 
  quadricarinato, 
  

  

  basi 
  rugoso, 
  sub-canaliculato, 
  transversim 
  leviter 
  impresso 
  ; 
  

  

  thorace 
  confertim 
  nigro-granulato 
  ; 
  elytris 
  punctato-striatis, 
  

  

  singulo 
  ad 
  apicem 
  paulo 
  producto, 
  subacuto. 
  

   Long. 
  Corp., 
  rost. 
  excl., 
  lin. 
  5 
  ; 
  lat. 
  lin. 
  2. 
  

   Patria, 
  Africa 
  meridionali-occidentalis. 
  

  

  This 
  insect 
  differs 
  considerably 
  from 
  Leptostethus 
  marginalus, 
  

   and 
  more 
  particularly 
  in 
  the 
  form 
  and 
  structure 
  of 
  the 
  rostrum, 
  

   a 
  circumstance 
  which 
  at 
  first 
  caused 
  me 
  to 
  hesitate 
  in 
  placing 
  it 
  

   in 
  the 
  same 
  genus; 
  after 
  a 
  minute 
  examination, 
  however, 
  I 
  found 
  

   so 
  many 
  points 
  in 
  common, 
  that 
  I 
  was 
  led 
  to 
  believe 
  that 
  the 
  two 
  

   insects 
  will 
  probably 
  hereafter 
  be 
  found 
  to 
  constitute 
  species 
  of 
  

   different 
  sections, 
  possibly 
  of 
  a 
  tolerable 
  extensive 
  genus, 
  and 
  

   peculiar 
  perhaps 
  to 
  the 
  as 
  yet 
  little 
  known 
  south-western 
  portions 
  

   of 
  Africa. 
  Whereas 
  L. 
  marginatus 
  is 
  remarkable 
  for 
  its 
  very 
  

   broad, 
  nearly 
  quadrate 
  rostrum, 
  the 
  upper 
  surface 
  of 
  which 
  is 
  

   nearly 
  Hat, 
  the 
  present 
  insect 
  has 
  a 
  rostrum 
  very 
  like 
  that 
  of 
  Poly- 
  

   phrades 
  in 
  its 
  proportions; 
  it 
  differs, 
  moreover, 
  in 
  being 
  some- 
  

   what 
  humped 
  between 
  the 
  points 
  of 
  insertion 
  of 
  the 
  antennae 
  ; 
  and 
  

   anterior 
  to 
  the 
  hump 
  the 
  rostrum 
  is 
  bent 
  down 
  so 
  as 
  to 
  form 
  an 
  

   obtuse 
  angle 
  with 
  the 
  hinder 
  part. 
  This 
  anterior 
  portion 
  of 
  the 
  

   rostrum 
  is 
  of 
  a 
  pitchy 
  brown 
  colour, 
  finely 
  punctured, 
  and 
  has 
  

   three 
  oblong 
  depressions, 
  which 
  are 
  bounded 
  and 
  separated 
  by 
  

   ridges. 
  The 
  hinder 
  part 
  of 
  the 
  rostrum 
  is 
  somewhat 
  convex 
  in 
  

   the 
  transverse 
  direction 
  ; 
  is 
  separated 
  from 
  the 
  head 
  by 
  a 
  shallow 
  

   transverse 
  depression 
  ; 
  punctured 
  ; 
  has 
  a 
  slight 
  groove 
  in 
  the 
  

   middle 
  at 
  the 
  base, 
  and 
  several 
  indistinct 
  longitudinal 
  r«gae. 
  

   The 
  head 
  (very 
  like 
  that 
  of 
  a 
  Polyphrades) 
  is 
  rugosely 
  punctured. 
  

   Thorax 
  considerably 
  broader 
  than 
  long, 
  with 
  the 
  sides 
  rounded, 
  

   the 
  fore 
  part 
  rather 
  narrower 
  than 
  the 
  hinder 
  part 
  ; 
  the 
  posterior 
  

   angles 
  in 
  the 
  form 
  of 
  right 
  angles 
  ; 
  the 
  fore 
  part 
  emarginated 
  

   above 
  and 
  below 
  ; 
  the 
  upper 
  surface 
  covered 
  with 
  smalt 
  sub- 
  

   depressed 
  granules, 
  between 
  which 
  are 
  pale 
  dirty 
  yellowish 
  scales, 
  

  

  VOL. 
  II. 
  N.S. 
  PART 
  VI, 
  SEPT. 
  1853. 
  N 
  . 
  

  

  