﻿REPORT 
  OF 
  TSETSE-FLY 
  INVESTIGATION 
  IN 
  NIGERIA. 
  

  

  395 
  

  

  of 
  the 
  farmed 
  area 
  giving 
  exactly 
  similar 
  conditions 
  of 
  intimate 
  contact 
  between 
  fly 
  

   and 
  man 
  to 
  those 
  described 
  above 
  in 
  Zaria 
  and 
  Kano 
  Provinces. 
  G. 
  palpalis 
  occurs 
  

   further 
  up 
  this 
  river 
  but 
  has 
  rarely 
  been 
  taken 
  near 
  its 
  mouth. 
  Sleeping 
  sickness 
  

   is 
  endemic. 
  

  

  Elsewhere 
  we 
  have 
  produced 
  evidence 
  that 
  tachinoid.es 
  can 
  flourish 
  in 
  localities 
  

   where 
  man 
  is 
  its 
  most 
  available 
  and 
  therefore 
  most 
  favoured 
  host. 
  Experimental 
  

   proof 
  that 
  tachinoides 
  is 
  a 
  carrier 
  of 
  human 
  trypanosomiasis 
  is 
  not 
  yet 
  complete, 
  

   and 
  we 
  were 
  not 
  fortunate 
  enough 
  to 
  discover 
  a 
  single 
  mature 
  T. 
  brucei-gambiense 
  

   group 
  infection 
  among 
  the 
  1,500 
  wild 
  flies 
  dissected, 
  but 
  transmission 
  feeding 
  experi- 
  

   ments 
  with 
  wild 
  tachinoides 
  at 
  Mashiwashi 
  yielded 
  an 
  infection 
  of 
  a 
  dog 
  by 
  a 
  trypano- 
  

   some 
  of 
  this 
  group. 
  Experiments 
  in 
  transmission 
  of 
  this 
  group 
  of 
  trypanosomes 
  

   by 
  laboratory 
  bred 
  tachinoides 
  are 
  in 
  progress. 
  

  

  (a) 
  Gimi 
  District, 
  Zana. 
  

  

  oKan 
  Kanke 
  

   I* 
  

  

  NO 
  Farm 
  e' 
  ,'jji 
  

  

  C,tN 
  e 
  

  

  lb) 
  Aulami 
  District, 
  Kano. 
  

  

  Sketch 
  Map 
  

  

  showinp 
  

  

  S/eep/hff 
  Sickness 
  

  

  //? 
  /?e/a£/on 
  to 
  

  

  G. 
  tac/»no/o'es 
  

  

  X 
  X 
  Places 
  where 
  

  

  Epidemic 
  S/eep'ny 
  

   Sickness 
  occurred. 
  

  

  X 
  P/aces 
  *v/rere 
  Sporadic 
  

   esses 
  ofS/eepiny 
  

   Sickness 
  occurred. 
  

  

  H 
  G. 
  t&ch/n 
  o/des 
  found 
  

  

  " 
  fitters 
  

  

  Poaols 
  

  

  p*t/u 
  

  

  Sca/e 
  I 
  inch 
  to 
  / 
  mi/e 
  

  

  Baqa 
  Kurui 
  V' 
  

  

  A 
  

  

  Sitti 
  A 
  

   X 
  \ 
  

  

  New 
  Aulami 
  i- 
  

  

  , 
  X 
  '_ 
  Old 
  Aulami 
  " 
  

  

  cV 
  --■-» 
  (deserted) 
  *. 
  

  

  v,u 
  5 
  v 
  XX 
  . 
  

  

  A 
  

  

  To 
  Hadub/a 
  \ 
  ,s" 
  .5 
  I 
  

   XX 
  «, 
  0°,U'° 
  

  

  ■ 
  y 
  A 
  

  

  Sca/e 
  £ 
  inch 
  to 
  / 
  mi/e 
  

  

  IX. 
  — 
  Summary 
  and 
  Conclusions. 
  

  

  1. 
  There 
  are 
  three 
  prevalent 
  species 
  of 
  tsetse-fly 
  in 
  the 
  Northern 
  Provinces 
  of 
  

   Nigeria 
  : 
  G. 
  palpalis, 
  G. 
  tachinoides 
  and 
  G. 
  morsitans. 
  G. 
  longipalpis 
  is 
  common 
  

   in 
  the 
  south-west 
  and 
  G. 
  fusca 
  has 
  been 
  recorded 
  from 
  Kabba. 
  The 
  three 
  prevalent 
  

   species 
  only 
  have 
  been 
  studied. 
  

  

  2. 
  G. 
  palpalis 
  and 
  tachinoides 
  are 
  limited 
  in 
  distribution 
  by 
  forest 
  conditions, 
  

   the 
  former 
  being 
  dependent 
  on 
  a 
  mainly 
  evergreen 
  type 
  of 
  forest 
  and 
  the 
  latter 
  finding 
  

   one 
  which 
  is 
  a 
  mixture 
  of 
  evergreen 
  and 
  deciduous 
  trees 
  sufficient. 
  Food 
  on 
  which 
  

  

  