﻿WITH 
  NOTES 
  ON 
  THE 
  GENITALIA 
  OF 
  SOME 
  AFRICAN 
  CULEX. 
  65 
  

  

  Normally 
  the 
  small 
  basal 
  parts 
  of 
  the 
  hypopygium 
  (unci, 
  harpagones 
  and 
  harpes) 
  

   are 
  in 
  the 
  relative 
  positions 
  in 
  which 
  they 
  are 
  shown 
  in 
  this 
  paper, 
  but 
  sometimes 
  

   (perhaps 
  after 
  use) 
  they 
  take 
  up 
  another 
  position 
  relatively 
  to 
  one 
  another, 
  in 
  which 
  

   the 
  unci 
  are 
  folded 
  outwards 
  and 
  the 
  harpagones 
  pushed 
  out 
  so 
  that 
  they 
  occupy 
  a 
  

   position 
  at 
  right 
  angles 
  to 
  the 
  normal 
  one. 
  The 
  figure 
  of 
  C. 
  pallidocephalus 
  (Bull. 
  

   Ent. 
  Res., 
  May 
  1913, 
  p. 
  56) 
  represents 
  these 
  parts 
  in 
  this 
  position 
  ; 
  a 
  specimen 
  in 
  

   which 
  they 
  are 
  thus 
  placed 
  (and 
  the 
  dislocation 
  may 
  occur 
  in 
  any 
  species 
  of 
  Culex) 
  

   at 
  first 
  sight 
  appears 
  to 
  possess 
  a 
  very 
  different 
  structure 
  from 
  one 
  in 
  which 
  the 
  position 
  

   is 
  normal. 
  

  

  Culex 
  trifilatus, 
  sp. 
  nov. 
  

  

  Head 
  with 
  the 
  upright 
  forked 
  scales 
  yellow, 
  a 
  few 
  black 
  towards 
  the 
  sides 
  ; 
  narrow 
  

   curved 
  scales 
  yellowish-white 
  ; 
  orbital 
  bristles 
  black, 
  except 
  those 
  in 
  the 
  middle, 
  

   which 
  are 
  yellow. 
  Palpi 
  and 
  proboscis 
  in 
  the 
  female 
  entirely 
  black-scaled. 
  Male 
  

   palpi 
  longer 
  than 
  the 
  proboscis 
  by 
  the 
  last 
  joint 
  ; 
  penultimate 
  joint 
  with 
  a 
  line 
  of 
  

   yellowish-white 
  scales 
  beneath, 
  terminal 
  joint 
  with 
  two 
  or 
  three 
  similarly 
  coloured 
  

   scales 
  at 
  its 
  base 
  beneath. 
  Thorax 
  with 
  dark 
  brown 
  integument, 
  black 
  bristles 
  and 
  

   small 
  dull 
  bronzy-brown 
  scales, 
  mixed 
  with 
  slightly 
  paler 
  and 
  coarser 
  ones 
  which 
  

   tend 
  to 
  form 
  indistinct 
  lines 
  ; 
  the 
  scales 
  on 
  and 
  near 
  the 
  scutellum 
  yellowish. 
  

   Abdomen 
  black 
  dorsally, 
  with 
  well-defined 
  yellowish 
  basal 
  bands 
  on 
  each 
  segment, 
  of 
  

   almost 
  even 
  width, 
  but 
  broadening 
  out 
  laterally 
  into 
  the 
  usual 
  side-spots 
  which 
  are 
  

   not 
  visible 
  from 
  above. 
  Segments 
  of 
  venter 
  with 
  black 
  apical 
  bands, 
  which 
  in 
  the 
  

   middle 
  line 
  extend 
  nearly 
  to 
  the 
  base 
  of 
  each 
  segment. 
  Hypopygium 
  of 
  <$ 
  as 
  in 
  fig. 
  1. 
  

   The 
  specific 
  name 
  is 
  derived 
  from 
  the 
  three 
  filament-like 
  divisions 
  of 
  the 
  harpagones, 
  

   which 
  readily 
  distinguish 
  this 
  species 
  from 
  all 
  others. 
  Legs 
  black-scaled, 
  except 
  the 
  

   under 
  sides 
  of 
  the 
  femora 
  towards 
  the 
  base, 
  and 
  the 
  tips 
  of 
  the 
  femora 
  and 
  tibiae 
  which 
  

   are 
  yellowish. 
  Claws 
  normal 
  (i.e. 
  the 
  fore 
  and 
  mid 
  claws 
  of 
  the 
  male 
  unequal, 
  each: 
  

   with 
  a 
  single 
  tooth, 
  the 
  hind 
  claws 
  of 
  the 
  male 
  and 
  all 
  the 
  claws 
  of 
  the 
  female 
  equal 
  

   and 
  simple). 
  Wings 
  with 
  dark 
  brown 
  scales 
  ; 
  the 
  fork-cells 
  rather 
  long, 
  the 
  upper 
  

   one 
  with 
  its 
  base 
  a 
  little 
  nearer 
  to 
  the 
  base 
  of 
  the 
  wing 
  ; 
  cross-veins 
  separated 
  by 
  a 
  

   distance 
  rather 
  less 
  than 
  the 
  length 
  of 
  the 
  posterior 
  one. 
  Lateral 
  vein-scales 
  linear. 
  

  

  Length 
  about 
  5 
  mm. 
  

  

  British 
  East 
  Africa 
  : 
  18 
  <$ 
  (including 
  type) 
  31 
  Q, 
  Kabete, 
  xi. 
  1913 
  (T. 
  J. 
  Anderson). 
  

  

  This 
  species 
  closely 
  resembles 
  C. 
  pallidocephalus, 
  Theo. 
  It 
  differs 
  in 
  having 
  more 
  

   numerous 
  yellow 
  upright 
  forked 
  scales 
  on 
  the 
  head 
  (in 
  C. 
  pallidocephalus 
  most 
  of 
  these 
  

   scales 
  are 
  brown) 
  and 
  in 
  the 
  slightly 
  shorter 
  male 
  palpi, 
  which 
  have 
  no 
  white 
  scales 
  

   towards 
  the 
  apex 
  of 
  the 
  terminal 
  joint 
  on 
  the 
  under 
  side 
  ; 
  the 
  dark 
  apical 
  bands 
  on 
  

   the 
  ventral 
  segments 
  are 
  more 
  distinct 
  and 
  blacker 
  than 
  in 
  C. 
  pallidocephalus. 
  In 
  

   C. 
  pallidocephalus 
  there 
  are 
  some 
  paler 
  scales 
  on 
  the 
  under 
  side 
  of 
  the 
  proboscis 
  about 
  

   the 
  middle, 
  especially 
  in 
  the 
  female 
  ; 
  there 
  are 
  quite 
  absent 
  in 
  C. 
  trifilatus. 
  Also 
  the 
  

   ventral 
  aspects 
  of 
  the 
  femora 
  in 
  C. 
  pallidocephalus 
  are 
  much 
  more 
  extensively 
  pale. 
  

  

  Culex 
  andersoni, 
  sp. 
  nov. 
  

  

  Differs 
  from 
  C. 
  trifilatus 
  as 
  follows 
  : 
  — 
  the 
  narrow 
  curved 
  scales 
  of 
  the 
  head 
  are 
  more 
  

   golden-yellow, 
  and 
  the 
  brown 
  upright 
  forked 
  scales 
  preponderate 
  over 
  the 
  yellow 
  

   ones 
  ; 
  the 
  scales 
  of 
  the 
  mesonotum 
  are 
  mainly 
  golden-yellow, 
  with 
  a 
  certain 
  number 
  of 
  

  

  (CIO) 
  E 
  

  

  