﻿WITH 
  NOTES 
  ON 
  THE 
  GENITALIA 
  OF 
  SOME 
  AFRICAN 
  CULEX. 
  75 
  

  

  shading 
  into 
  orange 
  on 
  the 
  apical 
  half. 
  Thorax 
  clothed 
  with 
  light 
  yellow 
  and 
  brown 
  

   narrow 
  curved 
  scales, 
  the 
  yellow 
  ones 
  forming 
  a 
  broad 
  marginal 
  and 
  a 
  narrow 
  median 
  

   line 
  ; 
  scutellum 
  with 
  a 
  few 
  narrow 
  yellow 
  scales 
  ; 
  pleurae 
  with 
  some 
  patches 
  of 
  

   silvery-white 
  scales. 
  Abdomen 
  long 
  and 
  thin, 
  with 
  dark 
  purplish-black 
  scales 
  above, 
  

   each 
  segment 
  with 
  silvery-white 
  lateral 
  patches 
  extending 
  along 
  the 
  greater 
  part 
  of 
  

   the 
  segment 
  from 
  the 
  base. 
  Genitalia 
  of 
  simple 
  structure, 
  almost 
  exactly 
  like 
  those 
  

   of 
  Theobaldia 
  ; 
  harpagones 
  not 
  developed. 
  Legs 
  clothed 
  with 
  dark 
  purplish 
  scales, 
  

   except 
  the 
  under 
  sides 
  of 
  the 
  fore 
  and 
  mid 
  femora, 
  the 
  basal 
  half 
  of 
  the 
  hind 
  femora, 
  

   the 
  under 
  side 
  of 
  the 
  base 
  of 
  all 
  the 
  tibiae, 
  the 
  outer 
  apical 
  half 
  of 
  the 
  middle 
  tibiae 
  

   and 
  the 
  base 
  of 
  the 
  first 
  joint 
  of 
  the 
  middle 
  and 
  hind 
  tarsi 
  ; 
  in 
  all 
  these 
  positions 
  the 
  

   scales 
  are 
  creamy-yellow. 
  Claws 
  of 
  fore 
  and 
  mid 
  legs 
  unequal, 
  the 
  larger 
  one 
  with 
  a 
  

   long 
  tooth 
  near 
  the 
  base 
  ; 
  hind 
  claws 
  equal 
  and 
  simple. 
  Wings 
  with 
  dark 
  brown 
  

   scales 
  ; 
  the 
  lateral 
  vein-scales 
  lanceolate 
  ; 
  fork-cells 
  a 
  little 
  longer 
  than 
  their 
  stems, 
  

   their 
  bases 
  practically 
  level. 
  

  

  Length 
  about 
  7 
  mm. 
  (without 
  proboscis). 
  

  

  Uganda 
  : 
  1 
  <J 
  (type), 
  Kasala 
  Stream, 
  viii. 
  1910 
  (Captain 
  A. 
  D. 
  Fraser, 
  R.A.M.C.) 
  ; 
  

   1 
  (J, 
  Chagwe 
  Forest, 
  ix. 
  1910 
  (Capt 
  Fraser). 
  Sierra 
  Leone 
  : 
  1 
  <J, 
  Darn 
  (Dr. 
  J. 
  C. 
  

   Murphy). 
  

  

  There 
  is 
  no 
  other 
  genus 
  in 
  which 
  this 
  species 
  can 
  be 
  satisfactorily 
  placed, 
  but 
  the 
  

   type 
  species 
  differs 
  from 
  L. 
  fraseri 
  in 
  its 
  smaller 
  size 
  and 
  much 
  shorter 
  palpi, 
  and 
  in 
  

   the 
  absence 
  of 
  the 
  apical 
  tufts 
  of 
  short 
  hairs 
  on 
  the 
  joints 
  of 
  the 
  antennae. 
  There 
  

   can 
  be 
  little 
  doubt 
  that 
  the 
  relationships 
  of 
  L. 
  fraseri 
  are 
  with 
  Mimomyia 
  and 
  Ficalbia, 
  

   and 
  from 
  an 
  examination 
  of 
  the 
  type 
  of 
  L. 
  lateralis, 
  together 
  with 
  information 
  kindly 
  

   supplied 
  to 
  me 
  by 
  Dr. 
  Kertesz 
  as 
  to 
  the 
  relative 
  lengths 
  of 
  its 
  tibia, 
  I 
  am 
  inclined 
  to 
  

   assign 
  it 
  to 
  the 
  same 
  position. 
  

  

  Eretmopodites 
  chrysogaster, 
  Graham. 
  

  

  In 
  this 
  species 
  the 
  side-pieces 
  of 
  the 
  hypopygium 
  have 
  a 
  long 
  thin 
  projection 
  on 
  

   their 
  inner 
  dorsal 
  side, 
  which 
  curves 
  downwards 
  and 
  carries 
  at 
  its 
  tip 
  some 
  very 
  long 
  

   scales 
  which 
  lie 
  close 
  together 
  and 
  at 
  first 
  sight 
  look 
  like 
  a 
  single 
  flattened 
  blade. 
  

   These 
  structures 
  have 
  been 
  figured 
  by 
  Graham, 
  but 
  inaccurately, 
  as 
  he 
  shows 
  them 
  

   attached 
  to 
  the 
  base 
  of 
  the 
  claspers 
  ; 
  he 
  also 
  incorrectly 
  speaks 
  of 
  them 
  as 
  the 
  harpes. 
  

  

  After 
  studying 
  a 
  large 
  number 
  of 
  specimens 
  of 
  E. 
  chrysogaster, 
  I 
  find 
  that 
  there 
  are 
  

   at 
  least 
  three 
  distinct 
  forms,* 
  distinguishable 
  mainly 
  by 
  the 
  form 
  of 
  the 
  scales 
  at 
  the 
  

   tip 
  of 
  the 
  above-described 
  projection 
  of 
  the 
  side-pieces. 
  The 
  differences, 
  which 
  I 
  

   believe 
  to 
  be 
  varietal 
  rather 
  than 
  specific, 
  are 
  as 
  follows 
  : 
  

  

  1. 
  E. 
  chrysogaster 
  (type 
  form). 
  Projections 
  of 
  side- 
  pieces 
  of 
  hypopygium 
  with 
  two 
  

   very 
  long 
  and 
  rather 
  narrow 
  scales 
  at 
  their 
  tips. 
  Last 
  two 
  joints 
  of 
  male 
  hind 
  tarsi 
  

   with 
  a 
  distinct 
  paddle-like 
  fringe 
  of 
  scales. 
  

  

  Larvae 
  of 
  this 
  form 
  have 
  been 
  received 
  from 
  Sierra 
  Leone 
  — 
  Matotaka 
  (Dr. 
  J. 
  J. 
  

   Simpson) 
  and 
  Moyamba 
  (Dr. 
  J. 
  S. 
  Pearson). 
  They 
  have 
  20-40 
  scales 
  (usually 
  about 
  

  

  * 
  E. 
  grahami, 
  Edw., 
  should 
  doubtless 
  also 
  be 
  regarded 
  as 
  a 
  form 
  of 
  E. 
  chrysogaster. 
  In 
  

   its 
  hypopygium 
  it 
  closely 
  resembles, 
  without 
  being 
  quite 
  identical 
  with, 
  E. 
  chrysogaster 
  

   var. 
  semisimplicipes. 
  

  

  