﻿ENTOMOLOGICAL 
  ASPECTS 
  OF 
  AN 
  OUTBREAK 
  OF 
  SLEEPING 
  SICKNESS. 
  327 
  

  

  So 
  far 
  as 
  the 
  fly 
  on 
  the 
  rivers 
  is 
  concerned, 
  I 
  am 
  not 
  clear 
  as 
  to 
  the 
  position 
  on 
  the 
  

   Mara 
  River, 
  which 
  Dr. 
  Maclean 
  was 
  about 
  to 
  revisit, 
  but 
  Dr. 
  Davey 
  had 
  failed 
  to 
  

   find 
  palpalis 
  on 
  the 
  Mori 
  River, 
  where 
  the 
  very 
  extensive 
  clearing 
  carried 
  out 
  by 
  the 
  

   Germans 
  was 
  still 
  effective 
  ; 
  but 
  I 
  was 
  informed 
  in 
  Kenya 
  that 
  on 
  the 
  Gori 
  and 
  Kuja 
  

   Rivers 
  just 
  north 
  of 
  the 
  Tanganyika 
  Territory 
  border 
  the 
  position 
  as 
  regards 
  

   infestation 
  remains 
  much 
  as 
  it 
  has 
  always 
  been 
  and 
  as 
  it 
  is 
  shown 
  on 
  the 
  map. 
  

   The 
  Kuja 
  flows 
  through 
  heavy 
  bush 
  and 
  forest 
  and 
  has 
  been 
  reported 
  by 
  Dr. 
  J. 
  O. 
  

   Beven 
  to 
  be 
  infested 
  in 
  its 
  whole 
  extent 
  to 
  Ramba, 
  where 
  are 
  grassy 
  uplands. 
  The 
  

   Gori 
  (Magori) 
  had 
  forested 
  banks 
  as 
  far 
  as 
  he 
  followed 
  it. 
  

  

  2. 
  Glossina 
  brevipalpis, 
  Newst. 
  

  

  This 
  fly 
  and 
  its 
  puparia, 
  many 
  of 
  the 
  latter 
  living, 
  were 
  found 
  in 
  numbers 
  

   in 
  the 
  denser 
  thickets 
  fringing 
  the 
  Rowana 
  [cf. 
  PI. 
  xv, 
  fig. 
  1), 
  and 
  especially 
  

   in 
  the 
  deep 
  narrow 
  cuttings 
  made 
  by 
  hippopotamuses 
  through 
  the 
  steep 
  bank. 
  

   Crocodiles 
  were 
  numerous 
  also. 
  G. 
  brevipalpis 
  also 
  occurred 
  on 
  the 
  Mbarangeti 
  

   and 
  (in 
  smaller 
  numbers) 
  on 
  the 
  small 
  Nyakurunduma 
  stream 
  an 
  hour 
  north 
  

   of 
  Tshamagasa, 
  and 
  in 
  the 
  mhali 
  acacia 
  wooding 
  with 
  much 
  dense 
  thicket 
  

   that 
  occurs 
  from 
  Tshamagasa 
  northwards 
  as 
  the 
  marginal 
  to 
  submarginal 
  fringe 
  to 
  

   the 
  Lake 
  that 
  I 
  have 
  referred 
  to. 
  Between 
  this 
  fringe 
  and 
  the 
  Lake 
  (north 
  of 
  the 
  

   Mbarangeti) 
  is 
  a 
  very 
  narrow 
  cleared 
  strip 
  in 
  which 
  cattle 
  are 
  kept, 
  it 
  is 
  said 
  safely. 
  

   Contrast 
  with 
  this 
  a 
  position 
  near 
  Nasa 
  where, 
  with 
  a 
  more 
  adventurous 
  fly 
  

   (G. 
  swynnertoni) 
  at 
  the 
  back 
  of 
  a 
  narrow 
  cleared 
  fringe, 
  cattle 
  cannot 
  be 
  kept. 
  

  

  During 
  the 
  working 
  of 
  the 
  Simiyu 
  area 
  a 
  solitary 
  G. 
  brevipalpis 
  was 
  found 
  at 
  the 
  

   bottom 
  of 
  a 
  cyanide 
  bottle, 
  but 
  no 
  fly-boy 
  claimed 
  it, 
  and 
  it 
  was 
  unsafe 
  to 
  assign 
  

   to 
  it 
  either 
  date 
  or 
  place. 
  I 
  was 
  surprised 
  at 
  our 
  failure, 
  despite 
  careful 
  search, 
  to 
  

   find 
  either 
  brevipalpis 
  or 
  its 
  puparia 
  in 
  the 
  rather 
  heavy 
  fringing 
  forest 
  on 
  the 
  

   Simiyu 
  that 
  is 
  shown 
  in 
  fig. 
  1 
  of 
  PI. 
  xv. 
  

  

  On 
  Mgasiro 
  Island, 
  in 
  Mara 
  Bay, 
  we 
  took 
  a 
  considerable 
  number 
  of 
  brevipalpis 
  

   puparia, 
  though 
  we 
  failed 
  to 
  find 
  either 
  the 
  fly 
  or 
  its 
  puparia 
  in 
  the 
  very 
  extensive 
  

   acacia 
  woodland 
  and 
  granite 
  kopjes, 
  in 
  which 
  cattle 
  run, 
  behind 
  Musoma 
  itself. 
  

   The 
  search 
  was 
  perhaps 
  insufficiently 
  prolonged 
  to 
  be 
  conclusive. 
  It 
  would 
  be 
  

   interesting 
  to 
  know 
  whether 
  on 
  Mgasiro 
  this 
  fly 
  fed 
  on 
  crocodiles. 
  

  

  3. 
  Glossina 
  fusca, 
  Walk. 
  

  

  As 
  Mr. 
  T. 
  J. 
  Anderson 
  informs 
  me 
  that 
  there 
  is 
  no 
  doubt 
  as 
  to 
  the 
  fact 
  that 
  

   the 
  large 
  tsetse 
  found 
  hitherto 
  north 
  of 
  the 
  Kenya 
  border 
  is 
  G. 
  fusca 
  only, 
  and 
  as 
  

   there 
  is 
  equally 
  no 
  doubt 
  that 
  the 
  specimens 
  taken 
  by 
  rnj^self 
  and 
  my 
  native 
  

   collectors 
  as 
  far 
  north 
  as 
  Mara 
  Bay 
  are 
  brevipalpis, 
  it 
  would 
  seem 
  that 
  the 
  

   Kenya-Tanganyika 
  border 
  may 
  at 
  this 
  point 
  constitute 
  approximately 
  the 
  dividing 
  

   line 
  between 
  these 
  two 
  flies. 
  It 
  may 
  be 
  a 
  matter 
  of 
  the 
  bush 
  conditions 
  associated 
  

   with 
  the 
  volcanic 
  and 
  the 
  granite 
  formations 
  respectively. 
  

  

  4. 
  Glossina 
  pallidipes, 
  Austen. 
  

  

  We 
  took 
  a 
  solitary 
  male 
  pallidipes 
  on 
  my 
  bait-cattle 
  beside 
  a 
  small 
  glen 
  lined 
  

   with 
  a 
  narrow 
  strip 
  of 
  bush 
  with 
  woody, 
  sclerophyllous, 
  ravine-type 
  undergrowth 
  

   [cf. 
  Bull. 
  Ent. 
  Res., 
  xi, 
  p. 
  319) 
  at 
  8 
  a.m. 
  on 
  16th 
  June. 
  It 
  was 
  taken 
  just 
  after 
  and 
  

   just 
  above 
  the 
  last 
  two 
  flies 
  of 
  the 
  G. 
  swynnertoni 
  belt 
  at 
  the 
  bottom 
  of 
  the 
  hill 
  — 
  the 
  

   south 
  side 
  of 
  the 
  Mount 
  Baridi 
  (Ushashi) 
  escarpment. 
  Another, 
  showing 
  close 
  

   approach 
  in 
  its 
  genitalia 
  to 
  G. 
  longipalpis, 
  was 
  taken 
  on 
  the 
  18th 
  by 
  Dr. 
  Maclean 
  

   at 
  Uhcmba 
  village 
  (not 
  Uhemba 
  district) 
  east 
  of 
  Ikisu 
  on 
  the 
  same 
  plateau. 
  It 
  is 
  

   shown 
  much 
  too 
  far 
  east 
  in 
  the 
  map. 
  Further 
  north, 
  on 
  the 
  Kenya 
  side 
  of 
  the 
  border 
  

   and 
  also 
  on 
  ours, 
  definite 
  pallidipes 
  areas 
  exist, 
  and 
  this 
  is 
  the 
  only 
  fly 
  of 
  the 
  

   morsitans 
  group 
  that 
  is 
  known 
  to 
  occur 
  anywhere 
  in 
  Kenya, 
  

  

  