﻿MOSQUITO 
  NOTES 
  — 
  III. 
  

  

  85 
  

  

  in 
  varieties 
  of 
  C. 
  pipiens, 
  C.fatigans 
  and 
  C. 
  univittatus). 
  The 
  following 
  Ethiopian 
  

   species 
  belong 
  to 
  this 
  series 
  : 
  — 
  

  

  C. 
  ventrilloni, 
  Edw. 
  C. 
  fatigans, 
  W. 
  

  

  C. 
  tipuliformis, 
  Theo. 
  C. 
  pallidocephalus 
  , 
  Theo. 
  

  

  C. 
  univittatus, 
  Theo. 
  C. 
  mirificus, 
  Edw. 
  

  

  (with 
  var. 
  wew!, 
  Theo.) 
  C. 
  andersoni, 
  Edw. 
  

  

  C. 
  simpsoni, 
  Theo. 
  C. 
  trifilatus, 
  Edw. 
  

  

  C. 
  pipiens, 
  L. 
  

   Of 
  these 
  species, 
  C. 
  ventrilloni 
  is 
  well 
  distinguished 
  by 
  its 
  basally-ringed 
  tarsal 
  

   segments, 
  C. 
  tipuliformis 
  by 
  its 
  lined 
  femora 
  and 
  tibiae, 
  and 
  C. 
  univittatus 
  and 
  

   C. 
  simpsoni 
  by 
  the 
  presence 
  of 
  post-spiracular 
  scales. 
  C. 
  neawj, 
  Theo., 
  is 
  structurally 
  

   identical 
  with 
  C. 
  univittatus, 
  of 
  which 
  it 
  should 
  doubtless 
  be 
  regarded 
  as 
  a 
  variety. 
  

   The 
  presence 
  of 
  post-spiracular 
  scales 
  Mill 
  help 
  to 
  distinguish 
  it 
  from 
  the 
  members 
  

   of 
  the 
  next 
  series. 
  

  

  2. 
  The 
  decens 
  series. 
  Last 
  two 
  segments 
  of 
  male 
  palpi 
  dark 
  beneath 
  (traces 
  of 
  

   a 
  white 
  line 
  in 
  C. 
  laurenti 
  only). 
  Abdominal 
  tergites 
  with 
  basal 
  lateral 
  pale 
  spots 
  

   (bands 
  complete 
  only 
  in 
  the 
  typical 
  form 
  of 
  C. 
  decens). 
  

  

  This 
  series 
  is 
  exclusively 
  Ethiopian, 
  and 
  comprises 
  the 
  following 
  species 
  :— 
  

   C. 
  argenieopunctatus, 
  Ventrillon. 
  C. 
  perfuscus. 
  Edw. 
  

  

  C. 
  laurenti, 
  Newst. 
  C. 
  trifoliatus, 
  Edw. 
  

  

  C. 
  decens, 
  Theo. 
  (with 
  var. 
  C. 
  scotti, 
  Theo. 
  

  

  invidiosus, 
  Theo.). 
  C. 
  grahami, 
  Theo. 
  

  

  C. 
  omatothoracis, 
  Theo. 
  C. 
  guiarli, 
  Blanch. 
  

  

  C. 
  perfidiosus, 
  Edw. 
  C. 
  ingrami, 
  Edw. 
  

  

  C. 
  argenteopunctatus 
  differs 
  from 
  the 
  other 
  species 
  not 
  only 
  in 
  the 
  conspicuous 
  

   silvery 
  spots 
  on 
  the 
  thorax, 
  but 
  also 
  in 
  the 
  possession 
  of 
  a 
  conspicuous 
  patch 
  of 
  post- 
  

   spiracular 
  scales. 
  It 
  seems, 
  however, 
  to 
  be 
  quite 
  in 
  place 
  in 
  this 
  series. 
  The 
  last 
  

   three 
  species 
  mentioned 
  diverge 
  in 
  having 
  the 
  male 
  aedoeagus 
  of 
  rather 
  simple 
  

   structure, 
  and 
  in 
  some 
  specimens 
  at 
  least, 
  in 
  the 
  possession 
  of 
  two 
  lower 
  mesepimeral 
  

   bristles. 
  ' 
  The 
  larval 
  siphon, 
  however, 
  is 
  extremely 
  elongate, 
  and 
  they 
  seem 
  better 
  

   placed 
  here 
  than 
  in 
  the 
  duttoni 
  group. 
  

  

  Group 
  IV. 
  The 
  rima 
  group. 
  One 
  lower 
  mesepimeral 
  bristle 
  (none 
  in 
  rubinotus). 
  

   Proboscis 
  and 
  tarsi 
  without 
  pale 
  rings. 
  Abdominal 
  tergites 
  with 
  the 
  pale 
  markings 
  

   apical 
  (sometimes 
  absent). 
  Aedoeagus 
  of 
  simple 
  structure, 
  often 
  tuberculate, 
  no 
  

   processes 
  from 
  lower 
  bridge. 
  Lobe 
  of 
  side-piece 
  with 
  a 
  distinct 
  leaf. 
  Eighth 
  sternite 
  

   of 
  S 
  deeply 
  emarginate, 
  allowing 
  the 
  hypopygium 
  to 
  project 
  downwards. 
  Larva 
  

   as 
  in 
  Group 
  III. 
  

  

  This 
  group 
  corresponds 
  more 
  or 
  less 
  to 
  Dyar's 
  subgenus 
  Neoculex. 
  There 
  are 
  

   only 
  five 
  Ethiopian 
  species. 
  C. 
  pulclnithorax, 
  Edw., 
  is 
  extremely 
  distinct 
  on 
  account 
  

   of 
  the 
  five 
  white 
  lines 
  on 
  the 
  black 
  thorax, 
  suggesting 
  a 
  Stegomyia 
  or 
  Finlaya. 
  The 
  

   other 
  four 
  species 
  (C. 
  rima, 
  Theo., 
  C. 
  rubinotus, 
  Theo., 
  C. 
  salisburiensis, 
  Theo., 
  

   and 
  C. 
  kingianus, 
  sp. 
  n.) 
  are 
  at 
  first 
  sight 
  very 
  similar, 
  but 
  nevertheless 
  show 
  well- 
  

   marked 
  distinctions. 
  They 
  are 
  dealt 
  with 
  in 
  more 
  detail 
  below. 
  

  

  Culex 
  omatothoracis, 
  Theo. 
  

  

  I 
  have 
  previously 
  given 
  this 
  as 
  a 
  synonym 
  of 
  C. 
  decens 
  var. 
  invidiosus, 
  on 
  account 
  

   of 
  the 
  fact 
  that 
  the 
  hypopygia 
  are 
  nearly, 
  "if 
  not 
  quite, 
  identical. 
  There 
  is, 
  however, 
  

   a 
  very 
  noticeable 
  difference 
  in 
  thoracic 
  ornamentation, 
  and 
  apart 
  from 
  this 
  there 
  

   seems 
  also 
  to 
  be 
  a 
  difference 
  in 
  the 
  structure 
  of 
  the 
  female 
  palpi 
  ; 
  those 
  of 
  C. 
  decens 
  

   are 
  considerably 
  shorter, 
  the 
  second 
  (last) 
  segment 
  less 
  than 
  twice 
  as 
  long 
  as 
  the 
  first, 
  

   while 
  in 
  C. 
  omatothoracis 
  the 
  second 
  segment 
  is 
  quite 
  three 
  times 
  as 
  long 
  as 
  the 
  first. 
  

   The 
  species 
  are 
  therefore 
  probably 
  distinct. 
  

  

  