﻿INVESTIGATIONS 
  INTO 
  THE 
  BIONOMICS 
  OF 
  GLOSSINA 
  PALPALIS. 
  

  

  383 
  

  

  both 
  of 
  very 
  small 
  size 
  — 
  it 
  is 
  extremely 
  common, 
  and 
  on 
  the 
  island 
  of 
  Mbugwe 
  

   it 
  is 
  far 
  more 
  numerous 
  inland 
  than 
  is 
  usual. 
  On 
  these 
  islands, 
  also, 
  unusual 
  extension 
  

   of 
  inland 
  range 
  of 
  fly 
  was 
  noted, 
  as 
  described 
  more 
  in 
  detail 
  in 
  Sect. 
  V 
  (d) 
  following. 
  

   At 
  the 
  end 
  of 
  the 
  island 
  survey 
  the 
  conclusion 
  was 
  definitely 
  reached 
  that 
  

   the 
  range 
  of 
  fly 
  inland 
  up 
  to 
  a 
  distance 
  of 
  approximately 
  2h 
  miles 
  is 
  controlled 
  in 
  the 
  

   islands 
  by 
  the 
  abundance 
  of 
  food. 
  A 
  summary 
  of 
  observations 
  on 
  this 
  point 
  in 
  tsetse 
  

   bionomics 
  is 
  presented 
  in 
  Table 
  XIX. 
  

  

  Table 
  XIX. 
  

  

  Fly 
  Survey 
  of 
  Islands 
  in 
  Victoria 
  Nyanza 
  showing 
  Correlation 
  between 
  

   Abundance 
  of 
  Host 
  Animals 
  and 
  Infestation 
  by 
  G-lossina 
  palpalis 
  in 
  the 
  Interior. 
  

  

  

  Infestation 
  by 
  Fly. 
  

  

  Host 
  Animals 
  in 
  Interior. 
  

  

  Island. 
  

  

  

  

  

  

  

  

  Shore. 
  

  

  Interior 
  

  

  Pig. 
  

  

  Situtunga. 
  

  

  Varanus. 
  

  

  Wema 
  

  

  Heavy 
  

  

  None 
  

  

  None 
  

  

  None 
  

  

  Few. 
  

  

  Rome 
  

  

  • 
  • 
  • 
  

  

  Light 
  ■. 
  

  

  . 
  , 
  . 
  . 
  

  

  55 
  • 
  • 
  

  

  Very 
  few. 
  . 
  

  

  Very 
  few. 
  

  

  Bugabu 
  

  

  • 
  • 
  • 
  

  

  Light 
  

  

  5: 
  

  

  

  >5 
  • 
  • 
  

  

  55 
  55 
  • 
  • 
  

  

  Few, 
  

  

  Bubembe 
  . 
  . 
  

  

  * 
  • 
  • 
  

  

  Light 
  

  

  5. 
  

  

  

  55 
  

  

  Few 
  

  

  55 
  

  

  Bugovu 
  

  

  • 
  • 
  

  

  Light 
  

  

  5. 
  

  

  

  55 
  • 
  • 
  

  

  Very 
  few. 
  . 
  

  

  55 
  

  

  Buvumira 
  . 
  . 
  

  

  • 
  • 
  • 
  

  

  Light 
  

  

  5. 
  

  

  

  55 
  • 
  • 
  

  

  55 
  : 
  5 
  

  

  55 
  

  

  Fumbe 
  

  

  • 
  • 
  • 
  

  

  Light 
  

  

  5. 
  

  

  

  I 
  

  

  55 
  • 
  • 
  

  

  Few 
  

  

  55 
  

  

  Bunyama 
  . 
  . 
  

  

  • 
  • 
  

  

  Light 
  

  

  5 
  

  

  

  •5 
  • 
  • 
  

  

  Very 
  few 
  . 
  . 
  

  

  Very 
  few. 
  

  

  Lulamba 
  

  

  ■ 
  • 
  • 
  

  

  Light 
  

  

  5. 
  

  

  

  Very 
  few. 
  . 
  

  

  None 
  

  

  Few. 
  

  

  Buvu 
  . 
  

  

  • 
  • 
  « 
  

  

  Medium 
  . 
  

  

  5 
  

  

  

  55 
  55 
  ■ 
  • 
  

  

  55 
  

  

  ; 
  5 
  

  

  Bukone 
  

  

  • 
  • 
  • 
  

  

  Light 
  

  

  5 
  

  

  

  55 
  55 
  • 
  • 
  

  

  55 
  

  

  55 
  

  

  Serinya 
  

  

  • 
  • 
  • 
  

  

  Medium 
  . 
  

  

  5 
  

  

  

  55 
  5 
  5 
  

  

  55 
  

  

  5 
  5 
  

  

  Kitobo 
  

  

  • 
  • 
  • 
  

  

  Medium 
  . 
  

  

  t 
  . 
  

  

  

  None 
  

  

  55 
  • 
  • 
  

  

  5 
  5 
  

  

  Bukana 
  

  

  * 
  • 
  • 
  

  

  Light 
  

  

  . 
  Light 
  

  

  Many 
  

  

  55 
  

  

  55 
  

  

  Damba 
  

  

  • 
  ■ 
  • 
  

  

  Heavy 
  

  

  . 
  Medium 
  . 
  . 
  

  

  None 
  

  

  Many 
  

  

  55 
  

  

  Zinga 
  . 
  . 
  H 
  

  

  • 
  • 
  > 
  

  

  Very 
  heavi 
  

  

  7 
  Light 
  

  

  ■>■> 
  

  

  55 
  • 
  • 
  

  

  55 
  

  

  Sesse 
  (Bugalla) 
  : 
  — 
  

  

  

  

  

  

  

  Western 
  Portion 
  

  

  Heavy 
  

  

  . 
  Light 
  

  

  55 
  

  

  Very 
  manj 
  

  

  55 
  

  

  Northern 
  ,, 
  

  

  Heavy 
  

  

  . 
  Medium 
  . 
  

  

  5 
  > 
  

  

  55 
  55 
  

  

  55 
  

  

  North 
  Central 
  Portion 
  . 
  . 
  

  

  Medium 
  . 
  

  

  . 
  Light 
  

  

  5 
  5 
  • 
  ■ 
  

  

  :5 
  55 
  

  

  5, 
  

  

  South 
  „ 
  ,, 
  

  

  Medium 
  . 
  

  

  . 
  Light 
  

  

  

  55 
  55 
  

  

  55 
  

  

  Southern 
  Portion 
  

  

  Heavy 
  

  

  . 
  Medium 
  . 
  

  

  ' 
  5 
  • 
  • 
  

  

  55 
  55 
  

  

  55 
  

  

  Mbugwe 
  

  

  Medium 
  . 
  

  

  . 
  Medium 
  . 
  

  

  ■ 
  5 
  

  

  Very 
  few 
  . 
  . 
  

  

  Many. 
  

  

  Manene* 
  

  

  Medium 
  . 
  

  

  . 
  Medium 
  . 
  

  

  ■i 
  ,, 
  

  

  71 
  55 
  

  

  Very 
  many. 
  

  

  Dziru* 
  

  

  Light 
  

  

  . 
  Light 
  

  

  55 
  • 
  • 
  

  

  i 
  

  

  None 
  

  

  Many. 
  

  

  * 
  Manene 
  and 
  Dziru 
  are 
  small 
  islands 
  less 
  than 
  1,000 
  yards 
  in 
  short 
  diameter, 
  but 
  

   are 
  remarkable 
  in 
  that 
  infestation 
  of 
  the 
  interior 
  is 
  equally 
  as 
  heavy 
  in 
  the 
  case 
  of 
  

   Dziru 
  and 
  heavier 
  in 
  the 
  case 
  of 
  Manene 
  than 
  along 
  the 
  shore. 
  

  

  V 
  (d). 
  inland 
  Range 
  of 
  Fly 
  as 
  affected 
  by 
  Varanus 
  on 
  the 
  islands. 
  

  

  Manene 
  Island. 
  

  

  Manene 
  Island 
  is, 
  perhaps, 
  1,000 
  yards 
  in 
  length, 
  by 
  500 
  in 
  breadth. 
  Its 
  northern 
  

   half 
  is 
  elevated 
  and 
  rocky, 
  its 
  southern 
  half 
  low 
  and 
  fertile. 
  Mostly 
  it 
  is 
  covered 
  

   with 
  thick 
  bush 
  or 
  forest, 
  except 
  for 
  the 
  rockiest 
  places, 
  and 
  also 
  excepting 
  the 
  

   site 
  of 
  old 
  plantations 
  in 
  the 
  very 
  middle 
  of 
  the 
  southern 
  half, 
  which 
  are 
  kept 
  open 
  

   and 
  closely 
  grazed 
  by 
  hippopotamus. 
  These 
  spaces 
  are 
  entirely 
  surrounded 
  by 
  

   thick 
  bush 
  or 
  forest. 
  

  

  