﻿20 
  JAS. 
  J. 
  SIMPSON 
  — 
  ENTOMOLOGICAL 
  

  

  Salaga 
  is 
  a 
  very 
  large 
  town 
  situated 
  on 
  the 
  ridge 
  which 
  forms 
  the 
  watershed 
  of 
  

   the 
  Volta 
  and 
  Daka. 
  It 
  is 
  the 
  headquarters 
  of 
  a 
  District 
  Commissioner 
  and 
  a 
  

   Medical 
  Officer. 
  Water 
  is 
  exceedingly 
  scarce 
  and 
  the 
  water 
  supply, 
  both 
  European 
  

   and 
  native, 
  is 
  from 
  wells. 
  There 
  are 
  over 
  800 
  of 
  these 
  wells 
  or 
  pits 
  in 
  the 
  native 
  

   town. 
  The 
  surrounding 
  country 
  is 
  very 
  bare, 
  and 
  there 
  is 
  hardly 
  a 
  shrub 
  large 
  

   enough 
  to 
  merit 
  the 
  name 
  of 
  a 
  tree. 
  The 
  only 
  blood-sucking 
  flies 
  seen 
  here 
  were 
  

   Tabanus 
  subangustus 
  and 
  Hippobosca 
  metadata, 
  but 
  Haematopota 
  beringeri 
  has 
  also 
  

   been 
  recorded 
  from 
  this 
  area, 
  and 
  Culicoides 
  grahami 
  and 
  Phlebotomus 
  antennatus 
  are 
  

   said 
  to 
  be 
  very 
  troublesome 
  at 
  certain 
  times 
  of 
  the 
  year. 
  

  

  From 
  Salaga 
  to 
  Dogankade 
  the 
  vegetation 
  becomes 
  slightly 
  thicker 
  ; 
  it 
  is 
  an 
  

   extremely 
  dry 
  region 
  and 
  the 
  nearest 
  water 
  at 
  the 
  time 
  of 
  my 
  visit, 
  21st 
  February 
  

   1913, 
  was 
  the 
  Kiver 
  Daka, 
  a 
  tributary 
  of 
  the 
  Volta, 
  nearly 
  two 
  miles 
  away. 
  At 
  this 
  

   river 
  G. 
  tachinoides 
  was 
  found 
  along 
  with 
  Tabanus 
  gratus. 
  T. 
  subangustus 
  was 
  

   found 
  in 
  the 
  town 
  itself 
  flying 
  round 
  the 
  lamp 
  at 
  night. 
  

  

  From 
  Dogankade 
  to 
  Turu 
  the 
  country 
  is 
  level 
  ; 
  grass 
  is 
  everywhere 
  abundant 
  ; 
  

   the 
  vegetation 
  is 
  scanty 
  ; 
  there 
  is 
  no 
  shade 
  and 
  no 
  water 
  on 
  the 
  road. 
  The 
  water 
  

   supply 
  for 
  the 
  town 
  is 
  several 
  miles 
  away. 
  Between 
  Turu 
  and 
  Palbusi 
  the 
  

   country 
  is 
  similar, 
  and 
  several 
  dry 
  water-courses 
  were 
  crossed. 
  At 
  the 
  water 
  

   supply, 
  not 
  far 
  from 
  the 
  town, 
  the 
  following 
  blood-sucking 
  insects 
  were 
  captured 
  : 
  — 
  

   Glossina 
  morsitans, 
  Tabanus 
  sticticollis, 
  T. 
  gratus, 
  T. 
  taeniola, 
  T. 
  biguttatus 
  var. 
  

   croceus 
  and 
  T. 
  laverani. 
  From 
  a 
  horse 
  several 
  specimens 
  of 
  Boophilus 
  decoloratus 
  

   were 
  taken. 
  

  

  North 
  of 
  Palbusi 
  is 
  the 
  Cherebo 
  River 
  which 
  becomes 
  dry 
  in 
  January 
  or 
  February. 
  

   The 
  country 
  is 
  open 
  as 
  before 
  and, 
  if 
  anything, 
  more 
  dried 
  up. 
  The 
  following 
  

   blood-sucking 
  insects 
  were 
  caught 
  at 
  Palbe 
  : 
  — 
  Glossina 
  morsitans, 
  Stomoxys 
  calci- 
  

   trans, 
  Tabanus 
  gratus, 
  T. 
  taeniola, 
  T. 
  sticticollis 
  and 
  T. 
  biguttatus 
  var. 
  croceus. 
  

  

  From 
  Palbe 
  to 
  Yamalga 
  the 
  country 
  is 
  still 
  more 
  open, 
  and 
  water 
  and 
  food 
  are 
  

   very 
  scarce. 
  The 
  only 
  blood-sucking 
  fly 
  seen 
  in 
  this 
  region 
  was 
  Tabanas 
  gratus, 
  

   near 
  the 
  water 
  supply 
  at 
  Palbe. 
  Between 
  Yamalga 
  and 
  Tamale 
  the 
  vegetation 
  is 
  

   similar 
  to 
  that 
  described 
  above. 
  

  

  (5.) 
  Tamale 
  to 
  Bawku. 
  

  

  Tamale 
  is 
  the 
  capital 
  of 
  the 
  Northern 
  Territories 
  and 
  the 
  headquarters 
  of 
  the 
  

   Chief 
  Commissioner, 
  the 
  Provincial 
  Medical 
  Officer, 
  and 
  the 
  Commandant 
  of 
  the 
  

   Northern 
  Territories' 
  Constabulary. 
  A 
  large 
  ginnery 
  belonging 
  to 
  the 
  British 
  

   Cotton-Growing 
  Association 
  is 
  also 
  situated 
  there. 
  The 
  European 
  reserve 
  is 
  

   extensive, 
  well-cleared, 
  well-laid 
  out 
  and 
  kept 
  in 
  splendid 
  order. 
  Blood-sucking 
  

   flies 
  are 
  conspicuous 
  by 
  their 
  absence, 
  so 
  much 
  so, 
  that 
  in 
  the 
  dry 
  season 
  many 
  

   Europeans 
  dispense 
  with 
  a 
  mosquito 
  net. 
  Horses 
  seem 
  to 
  thrive 
  well 
  in 
  this 
  station. 
  

   Every 
  European 
  keeps 
  at 
  least 
  one 
  pony, 
  and 
  there 
  is 
  a 
  large 
  well-filled 
  stable 
  in 
  

   connection 
  with 
  the 
  mounted 
  constabulary. 
  Deaths 
  are 
  very 
  rare, 
  and 
  when 
  such 
  

   take 
  place 
  the 
  infection 
  can 
  generally 
  be 
  traced 
  to 
  a 
  time 
  when 
  a 
  proclaimed 
  region 
  

   was 
  traversed. 
  

  

  The 
  native 
  town 
  is 
  also 
  well-kept 
  and 
  clean, 
  but 
  in 
  the 
  wet 
  season 
  mosquitos 
  are 
  

   not 
  uncommon. 
  The 
  following 
  species 
  have 
  from 
  time 
  to 
  time 
  been 
  obtained 
  

   there: 
  — 
  Anopheles 
  costalis, 
  Culex 
  tigripes 
  var. 
  fuscus, 
  C. 
  duttoni, 
  C. 
  univittatus, 
  

   C. 
  decern, 
  Cvliciomyia 
  nebtthsa, 
  Ochlerotatus 
  nigeriensis, 
  Stegomym 
  fasciata 
  and 
  

  

  