﻿INVESTIGATIONS 
  INTO 
  THE 
  BIONOMICS 
  OP 
  GLOSSINA 
  PALPALIS. 
  

  

  431 
  

  

  interest 
  is 
  probably 
  that 
  on 
  Lutoboka 
  Bay, 
  illustrated 
  by 
  figure 
  9, 
  which 
  centres 
  

   at 
  a 
  point 
  where 
  shelter 
  is 
  adequate 
  in 
  a 
  region 
  that 
  is 
  devoid 
  of 
  good 
  shelter. 
  Study 
  

   of 
  it 
  in 
  September 
  1914, 
  and 
  at 
  various 
  subsequent 
  visits, 
  provided 
  evidence 
  deemed 
  

   absolutely 
  conclusive 
  concerning 
  the 
  need 
  of 
  massive 
  shelter 
  within 
  easy 
  range 
  or 
  

   reach 
  of 
  Glossina 
  palpalis. 
  The 
  colony 
  (fig. 
  9) 
  is 
  seen 
  to 
  centre 
  at 
  the 
  point 
  where 
  

   the 
  heavy 
  shelter 
  of 
  a 
  forest 
  belt 
  ceases, 
  and 
  light 
  shelter 
  of 
  a 
  type 
  especially 
  attractive 
  

   to 
  active 
  flies 
  begins. 
  There 
  are 
  breeding 
  grounds 
  at 
  intervals 
  all 
  the 
  way 
  from 
  

   point 
  10 
  to 
  point 
  17, 
  but 
  density 
  falls 
  away 
  almost 
  as 
  abruptly 
  in 
  this 
  direction 
  as 
  

   in 
  the 
  opposite, 
  where 
  light 
  shelter 
  is 
  lacking, 
  and 
  where 
  a 
  positively 
  repulsive 
  

   belt 
  of 
  sudd 
  (papyrus 
  and 
  saw-grass) 
  fringes 
  the 
  shore. 
  

  

  Observation 
  Point 
  

   6 
  7 
  8 
  

  

  Fig. 
  9. 
  Diagram 
  showing 
  effect 
  of 
  shelter 
  on 
  range 
  and 
  density 
  of 
  G. 
  palpalis 
  in 
  

  

  Lutoboka 
  Bay. 
  

  

  Another 
  interesting 
  colony 
  is 
  that 
  shown 
  at 
  points 
  40 
  to 
  46 
  in 
  figure 
  7 
  (p. 
  423), 
  

   and 
  also 
  in 
  another 
  connection 
  in 
  figure 
  3 
  (p. 
  371). 
  In 
  this 
  case 
  a 
  short 
  reach 
  of 
  light 
  

   shelter 
  is 
  flanked 
  on 
  either 
  side 
  by 
  massive 
  shelter, 
  and 
  a 
  double-peaked 
  colony 
  

   results 
  : 
  i.e., 
  it 
  is 
  either 
  two 
  colonies 
  fused 
  broadly 
  together, 
  or 
  one 
  colony 
  with 
  two 
  

   nuclei. 
  

  

  