﻿420 
  

  

  W. 
  F. 
  FISKE. 
  

  

  Table 
  XXXI. 
  

  

  Comparison 
  hehveen 
  Maximum 
  Infestations 
  by 
  Glossina 
  palpalis 
  at 
  Points 
  on 
  

   Fly 
  Beaches 
  and 
  ai 
  other 
  Points 
  on 
  Victoria 
  Nyanza. 
  

  

  

  

  

  Date. 
  

  

  Infestation 
  by 
  Glossina. 
  

  

  Locality. 
  

  

  Catch. 
  

  

  Male 
  

  

  Density. 
  

  

  Female 
  

  

  Percentage. 
  

  

  m 
  

  

  o 
  

  

  "< 
  

  

  Zinga 
  Island 
  

  

  Pt. 
  No. 
  80, 
  Buddu 
  

  

  22nd 
  Sept. 
  1914 
  

   3rd 
  July, 
  1915 
  . 
  . 
  

  

  206 
  

  

  288 
  

  

  158-0 
  

   89-5 
  

  

  23-3 
  % 
  

   37-9 
  % 
  

  

  o3 
  

   0) 
  } 
  

  

  PP 
  

  

  ■! 
  

  

  Wema 
  Island 
  

   Yempaita 
  Island 
  

   Damba 
  Island 
  

   Nsadzi 
  Island 
  

  

  25th 
  Feb., 
  1914 
  . 
  . 
  

   24th 
  Feb., 
  1914 
  .. 
  

   12th 
  Feb., 
  1914 
  .. 
  

   3rd 
  Feb., 
  1914 
  . 
  . 
  

  

  203 
  

   377 
  

   269 
  

   391 
  

  

  67 
  

   59-6 
  

   55-8 
  

   36-4 
  

  

  34-0 
  % 
  

   32-2 
  % 
  

  

  6-7 
  % 
  

   16- 
  1 
  % 
  

  

  

  »! 
  

  

  ■i 
  

  

  Mujuzi 
  Colony 
  

   Lutoboka 
  Bay 
  . 
  . 
  

  

  24th 
  June, 
  193 
  5 
  

   11th 
  Sept., 
  1914 
  . 
  . 
  

  

  358 
  

   107 
  

  

  98-0 
  

   60-7 
  

  

  45-3 
  % 
  

   15-0 
  % 
  

  

  Other 
  P( 
  

  

  Tavu 
  Island 
  

   Bulago 
  Island 
  

   Kimmi 
  Island 
  

   Kiuwa 
  Island 
  

  

  15th 
  Jan., 
  1914 
  

   22nd 
  Jan., 
  1914 
  . 
  . 
  

   29th 
  Jan., 
  1914 
  . 
  . 
  

   18th 
  Feb., 
  1914 
  . 
  . 
  

  

  473 
  

   271 
  

   366 
  

   245 
  

  

  62-5 
  

   43-4 
  

   380 
  

  

  22-2 
  

  

  104 
  % 
  

   19-9 
  % 
  

   53-3 
  % 
  

   18'4 
  % 
  

  

  Total 
  and 
  averages 
  for 
  fly 
  beaches 
  

   Total 
  and 
  averages 
  for 
  other 
  points 
  

  

  1734 
  

  

  1820 
  

  

  77'7 
  

   541 
  

  

  25-1 
  % 
  

   27-1 
  % 
  

  

  VII 
  (e). 
  Breeding 
  Grounds 
  on 
  Old 
  Beach 
  Line. 
  

  

  In 
  every 
  case 
  cited 
  in 
  Table 
  XXXI 
  of 
  heavy 
  infestation 
  elsewhere 
  than 
  along 
  

   fly 
  beaches 
  the 
  breeding 
  grounds 
  were 
  found 
  to 
  be 
  in 
  sand 
  or 
  gravel 
  deposits 
  two 
  or 
  

   three 
  feet 
  above 
  the 
  level 
  of 
  the 
  lake 
  at 
  that 
  time 
  and 
  anywhere 
  from 
  10 
  to 
  100 
  yards 
  

   back 
  from 
  the 
  existing 
  shore 
  line. 
  It 
  was 
  quickly 
  obvious 
  that 
  the 
  lake 
  level 
  had 
  

   fallen 
  recently, 
  and 
  that 
  the 
  character 
  of 
  the 
  shore 
  had 
  frequently 
  undergone 
  radical 
  

   change 
  in 
  consequence. 
  

  

  What 
  had 
  been 
  a 
  narrow 
  sandy 
  beach 
  open 
  to 
  the 
  lake 
  and 
  overhung 
  by 
  large 
  trees 
  

   (a 
  fly 
  beach, 
  in 
  other 
  words) 
  had 
  been 
  left 
  high 
  and 
  dry, 
  and 
  was 
  separated 
  from 
  a 
  

   reed 
  -grown, 
  marshy 
  foreshore 
  by 
  a 
  more 
  or 
  less 
  marshy 
  and 
  open 
  belt, 
  usually 
  grass- 
  

   grown 
  and 
  closely 
  cropped 
  by 
  grazing 
  hippo. 
  From 
  the 
  water 
  there 
  would 
  be 
  no 
  

   indication 
  of 
  any 
  open 
  space, 
  or 
  of 
  any 
  sand 
  beach, 
  nor 
  of 
  anything 
  but 
  a 
  bed 
  of 
  

   reeds 
  and 
  forest 
  to 
  the 
  back 
  of 
  it. 
  

  

  At 
  other 
  points 
  where 
  low 
  flat 
  rocks 
  overgrown 
  with 
  tangled 
  vegetation 
  marked 
  

   the 
  existing 
  shore 
  line, 
  considerable 
  deposits 
  of 
  beach 
  sand 
  or 
  gravel 
  would 
  be 
  found 
  

   a 
  little 
  way 
  inland, 
  washed 
  up 
  by 
  the 
  waves 
  upon 
  the 
  shelving 
  rocks, 
  left 
  behind 
  

   by 
  the 
  receding 
  waters, 
  and 
  hidden 
  by 
  bushy 
  growth. 
  

  

  At 
  yet 
  other 
  points 
  these 
  conditions 
  were 
  reversed, 
  and 
  what 
  had 
  been 
  a 
  rock- 
  

   bound 
  shore 
  had 
  become 
  a 
  sand 
  or 
  gravel 
  beach 
  backed 
  by 
  a 
  line 
  of 
  rocks 
  hidden 
  

   by 
  vegetation. 
  

  

  