﻿22 
  JAS. 
  J. 
  SIMPSON 
  — 
  ENTOMOLOGICAL 
  

  

  was 
  the 
  only 
  species 
  of 
  tsetse 
  seen 
  there, 
  along 
  with 
  Tdbanus 
  taeniola 
  and 
  

   T. 
  pertinens. 
  

  

  From 
  Sugu 
  I 
  travelled 
  to 
  Diari 
  which 
  is 
  on 
  the 
  main 
  Tamale-Gambaga 
  road. 
  

   Here 
  G. 
  tachinoides 
  was 
  found, 
  and 
  on 
  the 
  grass 
  I 
  obtained 
  a 
  nymph 
  of 
  Argas 
  

   vespertilionis. 
  This 
  is 
  rather 
  an 
  unusual 
  record, 
  as 
  the 
  Argasidae 
  are 
  not 
  well 
  

   represented 
  in 
  West 
  Africa. 
  Between 
  Diari 
  and 
  Disiga 
  no 
  blood-sucking 
  flies 
  were 
  

   seen, 
  and 
  water 
  is 
  practically 
  non-existent 
  in 
  the 
  dry 
  season. 
  

  

  The 
  country 
  between 
  Disiga 
  and 
  Nasia 
  is 
  extremely 
  open 
  and 
  swampy 
  in 
  places 
  

   during 
  the 
  rains. 
  The 
  River 
  Kwarra 
  has 
  to 
  be 
  crossed 
  about 
  a 
  mile 
  from 
  Nasia 
  ; 
  

   there 
  G. 
  tachinoides 
  and 
  Tabanus 
  gratus 
  were 
  caught. 
  Game 
  is 
  abundant 
  around 
  

   Nasia, 
  and 
  although 
  Glossina 
  tachinoides 
  is 
  extremely 
  common 
  near 
  the 
  River 
  

   Kwarra, 
  no 
  G. 
  morsitans 
  were 
  seen 
  in 
  the 
  vicinity. 
  Other 
  blood-sucking 
  flies 
  

   caught 
  were 
  Stomoxys 
  calcitrans, 
  Tabanus 
  gratus 
  and 
  T. 
  sticticollis 
  ; 
  Auchmeromyia 
  

   luteola 
  was 
  also 
  found 
  in 
  the 
  native 
  town. 
  At 
  Boiyeni, 
  about 
  20 
  miles 
  further 
  north, 
  

   both 
  G. 
  palpalis 
  and 
  G. 
  tachinoides 
  were 
  caught, 
  along 
  with 
  Tabanus 
  laverani. 
  

   This 
  record 
  of 
  G. 
  palpalis 
  is 
  rather 
  anomalous. 
  

  

  Between 
  Boiyeni 
  and 
  Gambaga 
  no 
  blood-sucking 
  flies 
  were 
  seen. 
  Gambaga 
  was 
  

   the 
  old 
  headquarters 
  of 
  the 
  Northern 
  Territories 
  before 
  they 
  were 
  removed 
  to 
  

   Tamale. 
  It 
  is 
  a 
  well 
  laid 
  out 
  and 
  well 
  kept 
  town. 
  The 
  water 
  supply 
  is 
  excellent, 
  and 
  

   consists 
  of 
  several 
  springs 
  in 
  a 
  valley. 
  The 
  only 
  blood-sucking 
  insect 
  recorded 
  from 
  

   this 
  town 
  is 
  Tabanus 
  biguttatus 
  var. 
  croceus. 
  Between 
  Gambaga 
  and 
  Zongoire 
  a 
  

   very 
  steep 
  escarpment 
  has 
  to 
  be 
  descended, 
  and 
  in 
  the 
  depression 
  thus 
  formed 
  lies 
  

   the 
  White 
  Volta 
  River. 
  Near 
  this 
  river 
  the 
  following 
  insects 
  were 
  caught 
  : 
  — 
  

   G. 
  tachinoides, 
  Tabanus 
  gratus, 
  T. 
  pertinens, 
  T. 
  biguttatus 
  var. 
  croceus 
  and 
  Haematopota 
  

   decora. 
  The 
  White 
  Volta 
  River 
  is 
  again 
  crossed 
  after 
  Zongoire 
  and 
  here 
  G. 
  tachinoides 
  

   was 
  obtained. 
  At 
  Kugiri 
  the 
  only 
  blood-sucking 
  fly 
  seen 
  was 
  T. 
  pertinens. 
  

  

  Between 
  Kugiri 
  and 
  Binduri 
  the 
  country 
  is 
  almost 
  pure 
  savannah 
  ; 
  at 
  the 
  latter 
  

   town 
  G. 
  tachinoides, 
  T. 
  gratus 
  and 
  T. 
  pertinens 
  were 
  captured. 
  From 
  Binduri 
  to 
  

   Bawku 
  the 
  vegetation 
  is 
  very 
  scanty, 
  and 
  a 
  number 
  of 
  bare 
  volcanic 
  hills 
  rise 
  

   abruptly 
  from 
  the 
  general 
  plain 
  level. 
  No 
  blood-sucking 
  insects 
  were 
  seen 
  in 
  

   this 
  region. 
  

   (6.) 
  Bawku 
  to 
  Lorha. 
  

  

  Bawku 
  is 
  the 
  headquarters 
  of 
  a 
  District 
  Commissioner. 
  The 
  country 
  around 
  is 
  

   extremely 
  bare. 
  The 
  only 
  blood-sucking 
  insect 
  seen 
  was 
  Anopheles 
  costalis 
  — 
  in 
  fact 
  

   this 
  was 
  the 
  first 
  mosquito 
  seen 
  for 
  over 
  six 
  weeks. 
  

  

  The 
  journey 
  from 
  Bawku, 
  which 
  is 
  at 
  the 
  extreme 
  north-east 
  corner 
  of 
  the 
  

   Northern 
  Territories, 
  to 
  Lorha 
  in 
  the 
  north-west 
  corner 
  never 
  departs 
  far 
  from 
  the 
  

   northern 
  frontier. 
  Between 
  Bawku 
  and 
  Gogo 
  the 
  White 
  Volta 
  River 
  is 
  crossed 
  not 
  

   far 
  from 
  where 
  it 
  enters 
  the 
  Gold 
  Coast 
  from 
  French 
  territory. 
  In 
  April, 
  this 
  river 
  

   consists 
  of 
  a 
  few 
  isolated 
  pools 
  in 
  a 
  sandy 
  bed, 
  with 
  high 
  banks 
  covered 
  with 
  low 
  

   vegetation. 
  Tabanus 
  pertinens 
  and 
  T. 
  gratus 
  were 
  the 
  only 
  blood-sucking 
  insects 
  

   seen 
  there. 
  From 
  Gogo 
  to 
  Lili 
  the 
  country 
  consists 
  of 
  low 
  undulating 
  hills; 
  in 
  the 
  

   valleys 
  on 
  this 
  road 
  two 
  small 
  streams 
  were 
  crossed, 
  but 
  vegetation 
  on 
  the 
  banks 
  

   was 
  almost 
  absent, 
  and 
  no 
  blood-sucking 
  flies 
  were 
  seen. 
  Between 
  Lili 
  and 
  Nangudi 
  

   the 
  Red 
  Volta 
  River, 
  which 
  joins 
  the 
  White 
  Volta 
  some 
  distance 
  south 
  of 
  this, 
  was 
  

   crossed. 
  The 
  vegetation 
  on 
  the 
  banks 
  was 
  low 
  and 
  sparse 
  — 
  typical 
  pure 
  savannah 
  

   country. 
  At 
  Nangudi 
  Anopheles 
  costalis 
  was 
  caught. 
  From 
  Nangudi 
  to 
  Zuaragu 
  

  

  