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proceeding  downstream,  the  river  is  bordered  by  gradually  widening 
swampy  flats,  along  which  the  fly  has  not  been  found. 
We  went  along  the  British  bank  of  this  portion  of  the  Luapula  river  in 
January,  at  the  height  of  the  rains,  but  could  not  travel  by  water  as  there  were  no 
canoes  available.  Dr.  Spillane  covered  it  in  October,  and  reported  that  he  could 
not  find  Gl.  falfalis  at  that  time  (commencement  of  rains). 
On  the  Belgian  side,  however,  the  banks  are  high  and  protected 
by  trees,  and  it  is  quite  probable  that  the  species  exists  farther 
down  stream  on  this  side  of  the  river  although  we  cannot  speak 
definitely  on  this  point. 
The  fly  is  also  found  on  the  Kalungwisi  river,  along  a  small  stretch, 
about  ten  miles  in  length,  starting  just  below  the  old  Kalungwisi 
station  and  proceeding  up-stream.  Here  the  river  flows  through  low 
hills  which  are  well-wooded  to  the  water’s  edge.  Above  these  hills 
to  the  point  of  emergence  from  the  Machinga  (the  hills  at  the  edge 
of  the  plateau)  and,  again,  below  Kalungwisi  boma  to  Lake  Mweru, 
the  river  runs  between  low,  grass-covered  banks,  bounded  on  either 
side  by  wide,  marshy  flats,  and  along  these  portions  of  its  course 
Gl.  palpalis  has  not  been  found. 
On  two  separate  occasions,  in  May,  1908,  just  at  the  cessation  of  the  rains,  we 
explored  the  river  by  canoe,  but  saw  no  trace  of  Cl.  -palfalis. 
In  May,  1908,  we  followed  the  Kalungwisi  to  its  junction  with  the 
Luangwa  river,  and  then  went  up  this  stream  for  some  distance,  but 
were  unable  to  find  any  trace  of  the  fly,  although  in  many  places  the 
conditions  were  most  favourable.  In  its  upper  reaches,  the 
Kalungwisi,  like  so  many  of  the  Rhodesian  rivers,  flows  through 
very  wide  grassy  plains  almost  completely  destitute  of  cover. 
On  Lake  Mweru. — The  fly  is  not  uniformly  distributed  around 
the  whole  shore  of  this  lake,  but  occurs  in  small  patches  where  the 
trees  and  bushes  approach  close  to  the  water.  On  the  open  sandy 
beaches  it  is  absent.  It  is  also  found  for  some  distance  up  some  of 
the  tributaries  of  the  lake,  for  example  the  Luao  and  the  Luchinda, 
and  of  course  along  the  Lualaba  after  its  exit  from  the  lake.  It  is 
also  present  on  the  island  Kilwa  (Spillane). 
On  Lake  Tanganyika. — Glossina  palfalis  occurs  around  the 
whole  extent  of  the  British  shore,  and  up  the  principal  confluent  of  this 
part  of  the  lake,  the  Lovu  river,  for  a  distance  of  from  fifty  to  sixty 
miles  from  its  mouth  (i.e.,  a  short  distance  above  the  junction  of  the 
