﻿294 
  

  

  J. 
  W. 
  S. 
  MACFIE 
  AND 
  A. 
  INGRAM. 
  

  

  Associated 
  with 
  Pistia 
  stratiotes. 
  

  

  It 
  may 
  be 
  of 
  interest 
  to 
  add 
  here 
  a 
  short 
  note 
  on 
  the 
  insects 
  we 
  have 
  found 
  

   associated 
  with 
  the 
  water 
  lettuce, 
  Pistia 
  stratiotes, 
  and 
  to 
  give 
  the 
  following 
  list 
  of 
  

   mosquitos 
  and 
  Ceratopogonine 
  midges 
  which 
  we 
  have 
  reared 
  from 
  plants 
  of 
  this 
  weed 
  

   taken, 
  with 
  a 
  little 
  of 
  the 
  surrounding 
  water, 
  from 
  pools 
  or 
  river 
  back-waters 
  : 
  — 
  

  

  Mosquitos. 
  

   Ae'des 
  (Ochlerotatus) 
  albocephalus 
  , 
  Theo. 
  

   Aedomyia 
  africana, 
  N.-L. 
  

   Anopheles 
  costalis, 
  Loew. 
  

   A. 
  funestus, 
  Giles. 
  

   A. 
  mauritianus, 
  Grp. 
  

   A. 
  marshalli, 
  Theo. 
  

   A. 
  nili, 
  Theo. 
  

   A 
  . 
  pharoensis, 
  Theo. 
  

   Culex 
  decens, 
  Theo. 
  

   C. 
  guiarti, 
  Blanch. 
  

  

  C. 
  (Micraedes) 
  inconspicuosus 
  , 
  Theo. 
  

   C. 
  quasigelidus 
  , 
  Theo. 
  

   Lutzia 
  tigripes, 
  Grp., 
  var. 
  fusca, 
  Theo. 
  

   Ficalbia 
  mediolineata 
  , 
  Theo. 
  

   Mansonioides 
  africanus, 
  Theo. 
  

   Mimomyia 
  mimomyiaformis, 
  Newst. 
  

   M. 
  splendens, 
  Theo. 
  

   Uranotaenia 
  balfouri, 
  Theo. 
  

  

  Ceratopogonine 
  Midges. 
  

   Atrichopogon 
  ochrosoma, 
  I. 
  & 
  M. 
  

   Culicoides 
  austeni, 
  C. 
  I. 
  & 
  M. 
  

   C. 
  distinctipennis 
  , 
  Aust. 
  

   Dasyhelea 
  inconspicuosa 
  , 
  C. 
  I. 
  & 
  M. 
  

   Eukraiohelea 
  africana, 
  I. 
  & 
  M. 
  

   E. 
  versicolor, 
  I. 
  & 
  M. 
  

   Parabezzia 
  poikiloptera 
  , 
  I. 
  & 
  M. 
  

   Palpomyia 
  pistiae, 
  I. 
  & 
  M. 
  

   Thysanognathus 
  (Prionognathns) 
  

  

  pseudomaculipennis 
  , 
  C. 
  I. 
  & 
  M. 
  

   Probezzia 
  pistiae, 
  I. 
  & 
  M. 
  

   P. 
  stephensi, 
  I. 
  & 
  M. 
  

   Ankistrodactylns 
  (Schizodactylus) 
  par, 
  

  

  I. 
  & 
  M. 
  

   Sphaeromias 
  litoranrea, 
  I. 
  & 
  M. 
  

  

  In 
  addition 
  to 
  these 
  insects 
  several 
  species 
  of 
  Chironomidae 
  were 
  reared, 
  and 
  

   more 
  than 
  one 
  species 
  of 
  Syrphidae. 
  

  

  The 
  list 
  is 
  a 
  formidable 
  one, 
  and 
  particular 
  attention 
  should 
  be 
  called 
  to 
  the 
  fact 
  

   that 
  it 
  includes 
  six 
  species 
  of 
  Anopheles 
  — 
  that 
  is, 
  all 
  the 
  species 
  which 
  are 
  known 
  to 
  

   occur 
  commonly 
  in 
  this 
  part 
  of 
  the 
  Gold 
  Coast. 
  The 
  association 
  of 
  Anopheles 
  with 
  

   Pistia 
  plants 
  has 
  previously 
  been 
  noted. 
  On 
  a 
  former 
  occasion 
  (Bull. 
  Ent. 
  Res., 
  

   viii, 
  p. 
  136) 
  we 
  recorded 
  that 
  A. 
  costalis, 
  Loew, 
  and 
  A. 
  marshalli, 
  Theo., 
  frequented 
  

   Pi's^m-covered 
  pools. 
  In 
  this 
  connection, 
  however, 
  special 
  mention 
  should 
  be 
  made 
  

   of 
  the 
  observations 
  of 
  Zetek 
  (Bull. 
  Ent. 
  Res., 
  xi, 
  pp. 
  73-75), 
  who 
  has 
  found 
  A. 
  

   albimanus, 
  Wied., 
  and 
  A. 
  tarsimaculatus, 
  Goeldi, 
  in 
  association 
  with 
  this 
  weed 
  in 
  the 
  

   Panama 
  Canal 
  Zone, 
  and 
  has 
  discussed 
  the 
  necessity 
  of 
  dealing 
  with 
  the 
  plants. 
  

  

  