﻿422 
  

  

  W. 
  F. 
  FISKE. 
  

  

  Table 
  XXXII. 
  

   Fly 
  Survey 
  of 
  Small 
  Islands 
  in 
  Victoria 
  Nyanza 
  showing 
  Lack 
  of 
  Correlation 
  

   betvjeen 
  Extent 
  of 
  Breeding 
  Grounds 
  and 
  Degree 
  of 
  Infestation 
  by 
  Glossina 
  

  

  palpalis. 
  

  

  Island. 
  

  

  o 
  

   o 
  

  

  Date. 
  

  

  Tavu 
  

  

  Kimmi 
  . 
  

  

  Lukalu 
  West. 
  . 
  

  

  Islet 
  S. 
  of 
  Dziru 
  

  

  Lukalu 
  East 
  . 
  . 
  

  

  Kukassu 
  

  

  Dwavannu 
  

  

  Manene. 
  

  

  Dyavadermi 
  . 
  . 
  

  

  Kawari 
  West 
  . 
  

  

  Ziro 
  

  

  Kirengi. 
  

  

  Kizima 
  . 
  

  

  Karambidi 
  

  

  Namba 
  . 
  

  

  Kakide 
  . 
  

  

  Kibibi. 
  . 
  

  

  Dziru 
  

  

  Kawari 
  East 
  . 
  . 
  

  

  Marida 
  . 
  

  

  Mugogoya 
  

  

  Lugazi 
  . 
  

  

  Kisigalla 
  

  

  Limnaiba 
  

  

  Sanga 
  

  

  Lula 
  

  

  Sari 
  

  

  Dwanga 
  'Mto 
  . 
  

  

  Semanya 
  

  

  Dwanga 
  'Mkuru 
  

  

  Dwasengwe 
  . 
  . 
  

  

  Sentette 
  

  

  Karienga 
  

  

  Kaziru 
  . 
  

  

  Size 
  (1). 
  

  

  (6) 
  

  

  Jan. 
  

  

  1914 
  .. 
  

  

  (5) 
  

  

  Jan. 
  

  

  1914 
  . 
  . 
  

  

  (2) 
  

  

  Feb. 
  

  

  1914 
  .. 
  

  

  (2) 
  

  

  Mar. 
  

  

  1915 
  .. 
  

  

  (2) 
  

  

  Feb. 
  

  

  1914 
  .. 
  

  

  (2) 
  

  

  Aug. 
  

  

  1914 
  .. 
  

  

  (6) 
  

  

  July 
  

  

  1915 
  .. 
  

  

  (6) 
  

  

  Mar. 
  

  

  1915 
  .. 
  

  

  (2) 
  

  

  Mar. 
  

  

  1914 
  .. 
  

  

  (2) 
  

  

  Dec. 
  

  

  1913 
  .. 
  

  

  (3) 
  

  

  Feb. 
  

  

  1914 
  .. 
  

  

  (3) 
  

  

  Feb. 
  

  

  1914 
  .. 
  

  

  (2) 
  

  

  Jan. 
  

  

  1914 
  .. 
  

  

  (4) 
  

  

  Aug. 
  

  

  1914 
  .. 
  

  

  (6) 
  

  

  Jan. 
  

  

  1914 
  .. 
  

  

  (6) 
  

  

  Sept. 
  

  

  1914 
  .. 
  

  

  (6) 
  

  

  Sept. 
  

  

  1914 
  .. 
  

  

  (6) 
  

  

  Sept. 
  

  

  1914 
  .. 
  

  

  (6) 
  

  

  Dec. 
  

  

  1913 
  .. 
  

  

  (3) 
  

  

  Feb. 
  

  

  1914 
  .. 
  

  

  (4) 
  

  

  Sept. 
  

  

  1914 
  .. 
  

  

  (4) 
  

  

  Dec. 
  

  

  1913 
  .. 
  

  

  (6) 
  

  

  Feb. 
  

  

  1914 
  .. 
  

  

  (6) 
  

  

  Sept. 
  

  

  1914 
  .. 
  

  

  (6) 
  

  

  Feb 
  

  

  1914 
  .. 
  

  

  (4) 
  

  

  Nov. 
  

  

  1913 
  .. 
  

  

  (4) 
  

  

  Aug. 
  

  

  1915 
  .. 
  

  

  (3) 
  

  

  Feb. 
  

  

  1914 
  .. 
  

  

  (6) 
  

  

  Dec. 
  

  

  1913 
  .. 
  

  

  (3) 
  

  

  Feb. 
  

  

  1914 
  .. 
  

  

  (3) 
  

  

  Feb. 
  

  

  1914 
  .. 
  

  

  (6) 
  

  

  Dec. 
  

  

  1913 
  .. 
  

  

  (6) 
  

  

  Aug. 
  

  

  1914 
  .. 
  

  

  (6) 
  

  

  Aug. 
  

  

  1914 
  .. 
  

  

  B 
  or 
  C 
  

  

  A 
  

  

  B 
  

  

  D 
  

  

  D 
  

  

  D 
  

  

  C 
  

  

  B 
  

   B 
  or 
  C 
  

   C 
  orD 
  

  

  A 
  

  

  A 
  

   B 
  or 
  C 
  

  

  B 
  

  

  A 
  

  

  D 
  

  

  B 
  

  

  B 
  

   C 
  orD 
  

   B 
  or 
  C 
  

  

  B 
  

   C 
  or 
  D 
  

  

  D 
  

  

  B 
  

  

  D 
  

  

  D 
  

  

  C 
  

  

  B 
  

   C 
  orD 
  

  

  A 
  

  

  C 
  

   C 
  orD 
  

   C 
  orD 
  

   C 
  orD 
  

  

  Breeding 
  

  

  Grounds. 
  

  

  Infestation. 
  

  

  Male 
  

   Density. 
  

  

  Very 
  < 
  

  

  G^ood. 
  . 
  

  

  ,, 
  .... 
  

  

  55 
  55 
  • 
  • 
  

  

  5? 
  » 
  • 
  • 
  

  

  55 
  >> 
  

  

  Good 
  

  

  >» 
  

  

  

  >» 
  

  

  

  5' 
  

  

  

  55 
  

  

  

  55 
  ' 
  

  

  

  55 
  ■ 
  

  

  Poor 
  

  

  

  >j 
  

  

  

  ■> 
  i 
  

  

  

  j 
  > 
  

  

  

  ? 
  ? 
  

  

  

  j» 
  

  

  

  Very 
  Poor. 
  . 
  

  

  ?j 
  »» 
  • 
  • 
  

  

  55 
  >9 
  * 
  ' 
  

  

  >5 
  55 
  • 
  • 
  

  

  55 
  55 
  • 
  • 
  

  

  None 
  

  

  55 
  

  

  

  55 
  

  

  

  55 
  

  

  

  55 
  

  

  

  55 
  

  

  

  55 
  

  

  

  55 
  

  

  

  J» 
  

  

  

  46 
  

   37 
  

   9 
  

   3 
  

   

   

   23 
  

   17 
  

   8 
  

   7 
  

   5 
  

   3 
  

   2 
  

   16 
  

   9 
  

   8 
  

   7 
  

   7 
  

   4 
  

   4 
  

   7 
  

  

  1 
  

   

   14 
  

   9 
  

   

  

  Trace* 
  

   Trace* 
  

   00 
  

   00 
  

   00 
  

   0-0 
  

  

  Female 
  

   Ratio. 
  

  

  17-1 
  % 
  

   55-3 
  % 
  

   28-5 
  % 
  

   26-6 
  % 
  

  

  9-8 
  % 
  

   12-4 
  % 
  

   21-4 
  % 
  

   12-5 
  % 
  

   23-7 
  % 
  

   24-7 
  o 
  /o 
  

   11-0 
  % 
  

   11-7 
  % 
  

  

  16-2 
  % 
  

  

  13-4 
  % 
  

  

  4'7 
  % 
  

  

  108 
  o/ 
  

  

  4-4 
  % 
  

  

  15-7 
  % 
  

  

  6-0 
  % 
  

   9'4 
  % 
  

  

  * 
  One 
  fly 
  caught 
  possibly 
  followed 
  canoe 
  to 
  island. 
  

   (1). 
  Size 
  of 
  islets 
  : 
  A 
  125 
  to 
  625 
  acres, 
  roughly 
  estimated. 
  

  

  x> 
  Zo 
  ,, 
  lZo 
  ,, 
  ,, 
  ,, 
  

  

  5 
  ,, 
  Zo 
  ,, 
  ,, 
  ,, 
  

  

  Dl 
  ^ 
  

  

  x 
  55 
  " 
  55 
  55 
  55 
  

  

  (2). 
  See 
  Sect. 
  VIII. 
  The 
  factor 
  of 
  shelter 
  is 
  paramount. 
  

  

  (3). 
  See 
  Sect. 
  IX, 
  notes 
  on 
  spiders. 
  The 
  factor 
  of 
  natural 
  enemies 
  enters 
  in. 
  

  

  (4). 
  See 
  Sect. 
  VII 
  (h), 
  following. 
  The 
  factor 
  of 
  insularity 
  and 
  dispersion 
  of 
  fly 
  as 
  

   arbitrarily 
  restricted 
  on 
  small 
  islands 
  enters 
  in. 
  

  

  (5). 
  See 
  Sect. 
  VII 
  (i), 
  following. 
  The 
  factor 
  of 
  food 
  supply, 
  coupled 
  with 
  that 
  of 
  

   insularity 
  and 
  restriction 
  of 
  dispersion, 
  enters. 
  

  

  (6). 
  These 
  islands 
  are 
  : 
  (a) 
  well 
  sheltered, 
  (b) 
  without 
  undue 
  abundance 
  of 
  natural 
  

   enemies, 
  (c) 
  well 
  provided 
  with 
  food, 
  and 
  (d) 
  the 
  factor 
  of 
  insularity 
  appears 
  not 
  to. 
  count 
  

   heavily 
  or 
  at 
  all 
  in 
  its 
  effect 
  on 
  infestation. 
  They 
  appear 
  fairly 
  to 
  represent 
  the 
  effect 
  

   of 
  breeding 
  grounds 
  in 
  sand 
  and 
  gravel 
  on 
  density 
  of 
  tsetse. 
  

  

  