﻿14 
  JAS. 
  J. 
  SIMPSON 
  — 
  ENTOMOLOGICAL 
  

  

  bush. 
  There 
  is 
  no 
  telluric 
  moisture 
  in 
  such 
  a 
  region 
  and 
  no 
  shade 
  of 
  any 
  

   consequence. 
  Near 
  Dome 
  station 
  the 
  dense 
  vegetation 
  begins, 
  and 
  here 
  G. 
  palpalis 
  

   was 
  caught 
  in 
  the 
  railway 
  carriage. 
  Thereafter 
  to 
  Nsawam 
  a 
  distance 
  of 
  30 
  miles 
  

   from 
  Accra, 
  the 
  bush 
  gradually 
  beccmes 
  more 
  dense; 
  the 
  town 
  of 
  Nsawam 
  is 
  

   situated 
  in 
  a 
  forest 
  clearing 
  (Plate 
  III, 
  fig. 
  1). 
  G. 
  palpalis 
  was 
  also 
  seen 
  here. 
  

   The 
  river 
  Densu 
  rises 
  near 
  Nsawam 
  and 
  flows 
  through 
  Weshiang, 
  and 
  it 
  is 
  from 
  this 
  

   river 
  that 
  the 
  new 
  water-supply 
  for 
  Accra 
  is 
  taken. 
  

  

  (6) 
  To 
  Weshiang. 
  — 
  This 
  locality 
  is 
  about 
  11 
  miles 
  from 
  Accra. 
  The 
  country 
  for 
  

   the 
  first 
  7J 
  miles 
  is 
  similar 
  to 
  that 
  described 
  from 
  Accra 
  to 
  Dome, 
  but 
  near 
  the 
  

   village 
  of 
  Oblogo 
  is 
  the 
  commencement 
  of 
  a 
  G. 
  palpalis 
  belt. 
  This 
  continues 
  to 
  

   Weshiang, 
  and 
  it 
  is 
  more 
  than 
  probable 
  that 
  G. 
  palpalis 
  occurs 
  all 
  along 
  the 
  Densu 
  

   River 
  to 
  Nsawam. 
  Around 
  Weshiang 
  there 
  is 
  an 
  extensive 
  undulating 
  grassy 
  plain 
  

   with 
  clusters 
  of 
  palms 
  and 
  bush, 
  and 
  there 
  G. 
  longipalpis 
  occurs. 
  

  

  Mansonioides 
  uniformis 
  occurred 
  in 
  thousands 
  at 
  the 
  waterworks 
  camp 
  during 
  my 
  

   visit, 
  and 
  in 
  all 
  probability 
  they 
  breed 
  in 
  the 
  dam 
  formed 
  in 
  the 
  Densu 
  river 
  in 
  

   connection 
  with 
  the 
  works 
  (Plate 
  IV, 
  fig. 
  1). 
  Dr. 
  Ingram 
  found 
  that 
  in 
  Bole 
  

   the 
  larvae 
  and 
  pupae 
  of 
  this 
  species 
  were 
  to 
  be 
  found 
  in 
  fairly 
  clear 
  water 
  where 
  

   there 
  were 
  no 
  overhanging 
  trees 
  or 
  grass, 
  but 
  in 
  which 
  a 
  water 
  weed 
  (Pistia 
  

   stratiotes) 
  flourished, 
  to 
  which 
  both 
  larvae 
  and 
  pupae 
  clung 
  tenaciously. 
  This 
  is 
  

   very 
  important, 
  inasmuch 
  as 
  it 
  opens 
  up 
  a 
  new 
  source 
  of 
  trouble 
  and 
  shows 
  that 
  

   when 
  any 
  such 
  open 
  expanse 
  of 
  water 
  must 
  be 
  retained, 
  it 
  is 
  not 
  sufficient 
  to 
  cut 
  

   down 
  the 
  surrounding 
  vegetation, 
  but 
  the 
  whole 
  area 
  must 
  be 
  kept 
  free 
  from 
  this 
  

   weed. 
  This 
  should 
  be 
  kept 
  in 
  view 
  in 
  connection 
  with 
  the 
  new 
  dams 
  and 
  reservoirs 
  

   at 
  Weshiang. 
  

  

  (c) 
  To 
  Dodowa. 
  — 
  A 
  large 
  well-made 
  road, 
  suitable 
  for 
  motor 
  transport, 
  connects 
  

   Accra 
  with 
  Dodowa, 
  a 
  distance 
  of 
  27 
  miles, 
  and 
  is 
  daily 
  traversed 
  by 
  motor 
  waggons 
  

   belonging 
  to 
  the 
  trading 
  firms. 
  For 
  the 
  first 
  10 
  miles 
  or 
  so 
  the 
  country 
  is 
  as 
  open 
  as 
  

   before, 
  but 
  near 
  the 
  village 
  of 
  Adinta 
  it 
  is 
  covered 
  with 
  low 
  bush. 
  Two 
  specimens 
  of 
  

   G. 
  longipalpis 
  entered 
  the 
  motor 
  during 
  a 
  halt 
  made 
  at 
  this 
  village, 
  and 
  at 
  Dodowa 
  

   itself 
  G. 
  palpalis 
  was 
  caught. 
  

  

  Thus 
  we 
  see 
  that 
  at 
  distances 
  varying 
  from 
  5 
  to 
  12. 
  miles 
  from 
  Accra 
  both 
  

   G. 
  palpalis 
  and 
  G. 
  longipalpis 
  occur, 
  and 
  that 
  these 
  enter 
  both 
  railway 
  carriages 
  and 
  

   motor 
  waggons, 
  and 
  are 
  thus 
  transported 
  into 
  Accra. 
  It 
  is 
  difficult 
  to 
  say 
  at 
  

   present 
  whether 
  these 
  will 
  actually 
  find 
  suitable 
  breeding 
  grounds 
  in 
  or 
  near 
  the 
  

   town, 
  but 
  their 
  presence 
  is 
  a 
  distinct 
  menace 
  to 
  the 
  safe 
  keeping 
  of 
  ponies. 
  

   Trapping 
  at 
  and 
  near 
  the 
  railway 
  station 
  should 
  be 
  resorted 
  to, 
  and 
  it 
  would 
  be 
  

   interesting 
  to 
  find 
  out 
  the 
  percentage 
  of 
  sexes 
  caught. 
  

  

  Other 
  blood-sucking 
  flies 
  caught 
  at 
  Accra 
  include 
  Stomoxys 
  calcitrans, 
  Tabanus 
  

   biguttatus, 
  T. 
  ditaeniatus, 
  and 
  T. 
  taeniola. 
  At 
  Dodowa 
  in 
  addition 
  to 
  G. 
  palpalis, 
  

   Chrysops 
  longicornis 
  and 
  Hippocentrum 
  trimaculatum 
  were 
  captured. 
  

  

  Aburi 
  is 
  situated 
  about 
  five 
  miles 
  from 
  Dodowa, 
  and 
  is 
  about 
  1,500 
  feet 
  above 
  

   sea-level; 
  the 
  ascent 
  is 
  very 
  steep 
  and 
  the 
  hill 
  is 
  densely 
  wooded. 
  Here 
  are 
  

   situated 
  the 
  headquarters 
  of 
  the 
  Agricultural 
  Department 
  and 
  the 
  Government 
  

   Sanatorium. 
  G. 
  palpalis 
  was 
  encountered 
  about 
  half-way 
  between 
  Dodowa 
  and 
  

   Aburi. 
  Other 
  blood-sucking 
  flies 
  from 
  this 
  region 
  are 
  G. 
  fusca, 
  G. 
  pallicera, 
  

   Stomoxys 
  omega, 
  Hippocentrum 
  trimaculatum, 
  H. 
  versicolor, 
  Haematopota 
  grahami, 
  

   H. 
  torquens, 
  Tabanus 
  taeniola, 
  T. 
  socialis, 
  Culiciomyia 
  nebulosa, 
  Eretmopodites 
  

  

  