﻿397 
  

  

  FOUR 
  NEW 
  AFRICAN 
  MOSQUITOS. 
  

  

  By 
  F. 
  W. 
  Edwards. 
  

  

  {Published 
  by 
  permission 
  of 
  the 
  Trustees 
  of 
  the 
  British 
  Museum.) 
  

  

  ABdes 
  (Stegomyia) 
  chaussieri, 
  sp. 
  n. 
  

  

  $. 
  Head 
  clothed 
  almost 
  entirely 
  with 
  broad 
  flat 
  scales, 
  though 
  there 
  are 
  a 
  very 
  

   few 
  narrow 
  curved 
  ones 
  and 
  a 
  few 
  upright 
  forked 
  ones 
  on 
  the 
  nape. 
  Scales 
  at 
  the 
  

   back 
  of 
  the 
  head 
  mostly 
  light 
  pchreous 
  ; 
  a 
  rather 
  broad 
  creamy 
  mid-dorsal 
  stripe, 
  

   and 
  a 
  conspicuous 
  silvery 
  margin 
  to 
  the 
  eyes 
  ; 
  remaining 
  scales 
  on 
  upper 
  part 
  of 
  

   head 
  forming 
  two 
  large 
  but 
  irregular 
  patches 
  of 
  black 
  ; 
  another 
  small 
  black 
  patch 
  

   low 
  down 
  among 
  the 
  creamy 
  scales 
  on 
  each 
  side. 
  Clypeus 
  bare, 
  dark 
  brown. 
  

   Eyes 
  well 
  separated. 
  Orbital 
  bristles 
  dark 
  brown. 
  Proboscis 
  blackish, 
  slender, 
  

   slightly 
  longer 
  than 
  the 
  front 
  femora. 
  Palpi 
  fully 
  one-fourth 
  as 
  long 
  as 
  the 
  proboscis, 
  

   blackish, 
  with 
  the 
  usual 
  conspicuous 
  silvery 
  apical 
  patch. 
  Tori 
  blackish, 
  with 
  a 
  large 
  

   patch 
  of 
  silvery- 
  white 
  scales. 
  Thorax 
  with 
  the 
  integument 
  uniformly 
  black. 
  

   Mesonotum 
  clothed 
  mainly 
  with 
  rather 
  large 
  and 
  coarse, 
  dull 
  brown, 
  narrow, 
  curved 
  

   scales, 
  those 
  surrounding 
  the 
  ante-scutellar 
  space 
  golden-brown, 
  but 
  scarcely 
  any 
  

   broader 
  than 
  the 
  others, 
  and 
  not 
  forming 
  definite 
  lines 
  ; 
  no 
  mid-dorsal 
  golden 
  line 
  ; 
  

   a 
  small 
  patch 
  of 
  broad 
  flat 
  silvery 
  scales 
  in 
  the 
  middle 
  of 
  the 
  front 
  margin, 
  and 
  a 
  

   small 
  patch 
  of 
  narrower 
  scales 
  in 
  front 
  of 
  the 
  root 
  of 
  each 
  wing 
  ; 
  a 
  pair 
  of 
  large 
  

   crescent-shaped 
  patches 
  of 
  broadly 
  crescent-shaped 
  silvery-white 
  scales 
  in 
  the 
  

   anterior 
  half. 
  Scutellum 
  with 
  the 
  median 
  and 
  lateral 
  lobes 
  completely 
  clothed 
  with 
  

   silvery 
  scales. 
  Prothoracic 
  lobes, 
  pro-epimera, 
  and 
  a 
  large 
  part 
  of 
  the 
  pleurae 
  clothed 
  

   with 
  silvery-white 
  scales. 
  About 
  five 
  pro-epimeral 
  bristles, 
  and 
  about 
  five 
  post- 
  

   spiracular 
  ; 
  no 
  lower 
  mesepimeral. 
  Abdomen 
  clothed 
  mostly 
  with 
  purplish-black 
  

   scales 
  ; 
  the 
  first 
  tergite, 
  and 
  a 
  basal 
  band 
  on 
  each 
  of 
  tergites 
  2-7, 
  creamy 
  white 
  ; 
  

   all 
  tergites 
  with 
  large 
  silvery 
  basal 
  lateral 
  spots, 
  and 
  sternites 
  with 
  silvery 
  basal 
  

   bands. 
  Eighth 
  segment 
  rather 
  prominent 
  ; 
  cerci 
  very 
  short. 
  Legs 
  rather 
  slender. 
  

   Front 
  femora 
  almost 
  entirely 
  black 
  ; 
  mid 
  fermora 
  black 
  except 
  for 
  a 
  small 
  white 
  

   spot 
  on 
  the 
  anterior 
  side 
  just 
  beyond 
  the 
  middle, 
  and 
  a 
  rather 
  conspicuous 
  silvery- 
  

   white 
  tip 
  ; 
  hind 
  femora 
  all 
  white 
  on 
  the 
  basal 
  fourth, 
  the 
  outer 
  side 
  silvery-white 
  

   to 
  a 
  little 
  beyond 
  the 
  middle 
  and 
  also 
  rather 
  broadly 
  at 
  the 
  tip. 
  Front 
  and 
  middle 
  

   tibiae 
  with 
  a 
  small 
  white 
  spot 
  at 
  the 
  base 
  beneath, 
  hind 
  tibiae 
  entirely 
  black. 
  Front 
  

   and 
  middle 
  tarsi 
  black, 
  with 
  narrow 
  white 
  rings 
  at 
  the 
  bases 
  of 
  the 
  first 
  two 
  segments 
  ; 
  

   hind 
  tarsi 
  with 
  rather 
  narrow 
  white 
  rings 
  at 
  the 
  bases 
  of 
  the 
  first 
  three 
  segments, 
  

   fourth 
  segment 
  white 
  except 
  for 
  the 
  extreme 
  tip, 
  fifth 
  all 
  black. 
  Front 
  and 
  middle 
  

   claws 
  toothed 
  ; 
  hind 
  simple. 
  Wings 
  normal, 
  the 
  scales 
  ligulate 
  and 
  rather 
  dense. 
  

   Wing-length 
  4 
  mm. 
  

  

  Belgian 
  Congo 
  : 
  Sandoa 
  (Dr. 
  Chaussier) 
  ; 
  co-types, 
  4 
  $$, 
  presented 
  to 
  the 
  

   British 
  Museum 
  by 
  Dr. 
  M. 
  Langeron. 
  N.E. 
  Rhodesia 
  : 
  near 
  Lake 
  Young, 
  Feb. 
  

   1905 
  (R. 
  L. 
  Harger) 
  ; 
  2 
  $0 
  in 
  the 
  British 
  Museum. 
  

  

  This 
  species 
  is 
  dedicated, 
  at 
  Dr. 
  Langeron's 
  request, 
  to 
  Dr. 
  Chaussier, 
  who 
  has 
  

   collected 
  a 
  number 
  of 
  mosquitos 
  in 
  the 
  Belgian 
  Congo. 
  It 
  is 
  most 
  closely 
  allied 
  to 
  

   S. 
  poweri, 
  Theo., 
  differing 
  chiefly 
  in 
  the 
  larger 
  and 
  lighter 
  brown 
  mesonotal 
  scales, 
  

   in 
  having 
  the 
  scales 
  at 
  the 
  back 
  of 
  the 
  head 
  pale, 
  in 
  the 
  absence 
  of 
  fine 
  golden 
  lines 
  

   on 
  the 
  mesonotum 
  and 
  the 
  larger 
  size 
  of 
  the 
  crescent-shaped 
  spots, 
  and 
  in 
  the 
  entirely 
  

   dark 
  hind 
  tibiae. 
  

  

  Aides 
  (Stegomyia) 
  masseyi, 
  sp. 
  n. 
  

  

  Closely 
  allied 
  to 
  A. 
  (S.) 
  poweri, 
  Theo., 
  differing 
  as 
  follows: 
  — 
  Silvery 
  margin 
  to 
  

   the 
  eyes 
  continuous, 
  not 
  interrupted 
  by 
  black 
  spots. 
  The 
  white 
  patch 
  on 
  the 
  front 
  

   margin 
  of 
  the 
  mesonotum 
  composed 
  of 
  quite 
  narrow 
  scales 
  instead 
  of 
  very 
  broad 
  

  

  