﻿273 
  

  

  NEW 
  AND 
  LITTLE-KNOWN 
  EAST 
  AFRICAN 
  CULICIDAE. 
  

  

  By 
  F. 
  W. 
  Edwards. 
  

  

  (Published 
  by 
  permission 
  of 
  the 
  Trustees 
  of 
  the 
  British 
  Museum), 
  

  

  Collections 
  recently 
  received 
  by 
  the 
  Imperial 
  Bureau 
  of 
  Entomology, 
  chiefly 
  from 
  

   Natal, 
  have 
  brought 
  to 
  light 
  several 
  interesting 
  new 
  forms 
  in 
  this 
  group 
  of 
  flies, 
  and 
  

   their 
  study 
  has 
  yielded 
  certain 
  unlooked 
  for 
  results 
  which 
  it 
  appears 
  desirable 
  to 
  

   place 
  on 
  record, 
  together 
  with 
  descriptions 
  of 
  the 
  new 
  species, 
  the 
  types 
  of 
  which 
  

   have 
  been 
  presented 
  by 
  the 
  Bureau 
  to 
  the 
  British 
  Museum. 
  The 
  opportunity 
  has 
  

   been 
  taken 
  of 
  publishing 
  revised 
  keys 
  to 
  the 
  African 
  species 
  of 
  Banksinella 
  and 
  

   Taeniorhynchus. 
  

  

  Genus 
  Banksinella, 
  Theo. 
  

  

  1 
  . 
  Costa 
  partly 
  white 
  or 
  yellowish 
  

   Costa 
  entirely 
  dark 
  

  

  2. 
  Costa 
  white 
  on 
  apical 
  third 
  or 
  half 
  ; 
  proboscis 
  

  

  unbanded 
  ; 
  hind 
  tibiae 
  mostly 
  dark 
  ; 
  dorsum 
  

   of 
  thorax 
  almost 
  all 
  white 
  ; 
  abdomen 
  

   banded. 
  . 
  

   Costa 
  with 
  two 
  yellow 
  spots 
  ; 
  proboscis 
  with 
  

   a 
  yellow 
  median 
  band 
  ; 
  hind 
  tibiae 
  with 
  

   golden-yellow 
  markings 
  ; 
  abdomen 
  un- 
  

   banded 
  

  

  3. 
  Wings 
  entirely 
  without 
  yellow 
  scales 
  ; 
  no 
  well- 
  

  

  defined 
  yellow 
  border 
  to 
  thorax 
  ; 
  abdomen 
  

   unbanded 
  

   Wings 
  with 
  yellow 
  scales 
  present, 
  at 
  least 
  on 
  the 
  

   bases 
  of 
  the 
  first 
  and 
  fifth 
  longitudinal 
  

   veins 
  ; 
  thorax 
  normally 
  with 
  a 
  well-defined 
  

   yellow 
  border 
  . 
  . 
  

  

  4. 
  First 
  longitudinal 
  vein, 
  and 
  the 
  lower 
  branch 
  

  

  of 
  the 
  fifth, 
  yellow-scaled 
  almost 
  to 
  their 
  

   tips 
  ; 
  hind 
  tibiae 
  with 
  a 
  small 
  apical 
  yellow- 
  

   ish 
  spot 
  ; 
  middle 
  tibiae 
  rather 
  conspicuously 
  

   yellow 
  on 
  the 
  hinder 
  side, 
  especially 
  towards 
  

   the 
  tip 
  

   First 
  longitudinal 
  vein 
  dark-scaled 
  beyond 
  the 
  

   base 
  of 
  the 
  third 
  vein 
  

  

  5 
  . 
  Hind 
  tibiae 
  with 
  a 
  distinct 
  pale 
  spot 
  at 
  the 
  apex 
  ; 
  

  

  proboscis 
  with 
  a 
  more 
  or 
  less 
  distinct 
  yellow 
  

   ring 
  in 
  the 
  middle 
  ; 
  abdomen 
  unbanded, 
  at 
  

   least 
  on 
  the 
  basal 
  segments 
  

   C120). 
  Wt.P863. 
  1,000. 
  3.15. 
  B.<feF.,Ltd. 
  Gp.11/1. 
  

  

  albicosta, 
  Edw. 
  

  

  punctocostalis, 
  Theo 
  

  

  fuscinervis, 
  Edw. 
  

  

  luteolateralis, 
  Theo. 
  

  

  