﻿460 
  

  

  W. 
  S. 
  FISKE. 
  

  

  Conditions 
  in 
  1906. 
  

   (Eeport 
  of 
  Dr. 
  E. 
  Van 
  Someren.) 
  

  

  " 
  A 
  more 
  or 
  less 
  continuous 
  line 
  of 
  

   merinde 
  trees 
  occurs 
  some 
  5 
  to 
  15 
  yards 
  

   off 
  the 
  shore. 
  

  

  " 
  I 
  formed 
  the 
  opinion 
  therefore 
  that 
  

   the 
  absence 
  of 
  fly 
  from 
  the 
  point 
  north 
  of 
  

   Namirembe 
  until 
  Bale 
  could 
  be 
  accounted 
  

   for 
  by 
  absence 
  of 
  suitable 
  breeding 
  places 
  

   owing 
  to 
  the 
  conformation 
  mentioned. 
  

  

  ' 
  Southwards 
  of 
  Bale 
  however 
  the 
  beach 
  

   is 
  narrower 
  and 
  fringed 
  with 
  small 
  bushes 
  

   and 
  apparently 
  suitable 
  for 
  fly. 
  

  

  ; 
  ' 
  I 
  was 
  surprised, 
  therefore, 
  to 
  find 
  

   none, 
  and 
  cannot 
  account 
  for 
  it. 
  

  

  " 
  This 
  part 
  of 
  the 
  coast 
  is 
  being 
  gradually 
  

   encroached 
  upon 
  owing 
  to 
  the 
  action 
  of 
  

   the 
  waves 
  killing 
  the 
  trees 
  and 
  bushes 
  by 
  

   washing 
  away 
  the 
  soil, 
  which 
  is 
  chiefly 
  sand. 
  

  

  " 
  I 
  repeatedly 
  examined 
  these 
  fly-free 
  

   areas 
  under 
  favourable 
  weather 
  conditions, 
  

   but 
  the 
  results 
  were 
  uniformly 
  negative. 
  

  

  Note 
  on 
  Sex 
  disparity. 
  

   " 
  As 
  regards 
  the 
  relative 
  number 
  of 
  

   male 
  and 
  female 
  flies 
  I 
  have 
  evidence 
  

   which 
  I 
  think 
  goes 
  to 
  support 
  Dr. 
  Bag- 
  

   shawe's 
  observations 
  (No. 
  42, 
  S. 
  S.E.I.) 
  as 
  

   I 
  have 
  had 
  most 
  favourable 
  opportunities 
  

   for 
  the 
  purpose. 
  

  

  "On 
  three 
  occasions 
  with 
  the 
  aid 
  of 
  

   the 
  fly 
  boys 
  we 
  examined 
  simultaneously 
  

   that 
  part 
  of 
  the 
  Gwamba 
  where 
  numerous 
  

   fishermen 
  were 
  daily 
  working 
  the 
  sambas, 
  

   and 
  another 
  part 
  some 
  miles 
  beyond 
  the 
  

   last 
  net 
  where 
  practically 
  only 
  passing 
  

   canoes 
  may 
  chance 
  to 
  camp 
  the 
  night. 
  

   The 
  results 
  were 
  : 
  — 
  

  

  Frequented 
  Area. 
  

  

  1st 
  day 
  52 
  <? 
  to 
  58 
  

  

  2nd 
  „ 
  40(2 
  to 
  37 
  $ 
  

  

  3rd 
  „ 
  24 
  c? 
  to 
  29$ 
  

  

  Unfrequented 
  Area. 
  

  

  1st 
  day 
  75 
  <? 
  to 
  40 
  $ 
  

  

  2nd 
  „ 
  113 
  c? 
  to 
  68$ 
  

  

  3rd 
  „ 
  95 
  $ 
  to 
  37$ 
  

  

  Conditions 
  in 
  1915. 
  

   (Fly 
  Survey.) 
  

   cutting 
  away 
  the 
  embankment 
  at 
  others, 
  

   so 
  that 
  the 
  young 
  trees 
  and 
  jungles 
  growing 
  

   upon 
  it 
  were 
  being 
  undermined 
  and 
  thrown 
  

   into 
  the 
  lake. 
  

  

  The 
  new 
  shore 
  line 
  cannot 
  be 
  less 
  than 
  

   20 
  or 
  30 
  yards, 
  average 
  distance, 
  outside 
  

   the 
  shore 
  line 
  of 
  1906. 
  The 
  old 
  line 
  of 
  

   merinde 
  trees 
  has 
  mostly 
  disappeared, 
  

   with 
  only 
  here 
  and 
  there 
  a 
  few 
  straggling 
  

   survivors 
  or 
  decaying 
  trunks. 
  A 
  new 
  

   line, 
  continuous 
  or 
  nearly 
  so 
  for 
  some 
  3 
  

   miles 
  north 
  of 
  Sekwe, 
  has 
  sprung 
  up, 
  and 
  

   at 
  other 
  points 
  a 
  new 
  line 
  is 
  forming. 
  

  

  Certainly 
  the 
  conditions 
  described 
  could 
  

   not 
  possibly 
  provide 
  good 
  breeding 
  places 
  ; 
  

   neither 
  would 
  the 
  shelter 
  be 
  suitable. 
  

   Either 
  cause 
  would 
  suffice 
  in 
  explanation. 
  

  

  Southward 
  from 
  Bale 
  the 
  beach 
  is 
  now 
  

   from 
  20 
  to 
  100 
  yards 
  from 
  bush 
  or 
  forest 
  

   with 
  open 
  grass 
  land 
  intervening. 
  Then 
  

   for 
  rather 
  more 
  than 
  a 
  mile 
  thick 
  jungle 
  

   grows 
  to 
  the 
  very 
  edge 
  of 
  the 
  water. 
  

   Beyond 
  this 
  it 
  is 
  open 
  or 
  semi-open 
  to 
  

   Mujuzi 
  Creek. 
  

  

  In 
  1915 
  this 
  reach 
  of 
  shore 
  appeared 
  

   to 
  be 
  foodless, 
  and 
  the 
  flies 
  dispersing 
  

   into 
  it 
  from 
  the 
  great 
  colony 
  at 
  Mujuzi 
  

   creek 
  were 
  plainly 
  famishing 
  (88*8 
  per 
  

   cent, 
  of 
  females 
  at 
  one 
  point, 
  see 
  p. 
  373). 
  

  

  This 
  part 
  of 
  the 
  coast 
  is 
  now 
  (1915) 
  

   being 
  added 
  to, 
  and 
  the 
  conditions 
  described 
  

   by 
  Dr. 
  Van 
  Someren 
  prevail 
  at 
  points 
  

   north 
  of 
  Bale, 
  as 
  noted 
  above. 
  

  

  The 
  catch 
  of 
  fly 
  made 
  over 
  approximately 
  

   this 
  same 
  territory 
  in 
  1915 
  consisted 
  of 
  

   ,768 
  males 
  to 
  591 
  females 
  = 
  female 
  per- 
  

   centage 
  of 
  43' 
  9. 
  

  

  This 
  compares 
  with 
  the 
  following 
  figures 
  

   of 
  percentages 
  from 
  Dr. 
  Van 
  Someren's 
  

   report. 
  

  

  Frequented 
  area: 
  — 
  Males 
  116 
  to 
  females 
  

   124 
  — 
  female 
  percentage 
  of 
  51*7. 
  

  

  Unfrequented 
  area 
  : 
  — 
  Males 
  283 
  to 
  females 
  

   135 
  = 
  female 
  percentage 
  of 
  32*1. 
  

  

  Total 
  catch 
  both 
  areas 
  : 
  — 
  Males 
  399 
  to 
  

   females 
  259 
  = 
  percentage 
  of 
  females 
  of 
  

   39-2. 
  

  

  Dr. 
  Van 
  Someren 
  does 
  not 
  state 
  the 
  number 
  

   of 
  fly 
  boys 
  employed 
  or 
  time 
  spent 
  in 
  

   catching, 
  but 
  it 
  is 
  interesting 
  to 
  note 
  that 
  

   the 
  flies 
  are 
  about 
  as 
  hungry 
  in 
  the 
  general 
  

   region 
  now 
  as 
  they 
  were 
  in 
  1906, 
  there 
  

   being 
  a 
  difference 
  of 
  but 
  4*7 
  points 
  between 
  

   the 
  figure 
  for 
  the 
  total 
  catches 
  at 
  the 
  two 
  

   widely 
  separated 
  periods. 
  

  

  