rare— we  have  no  exact  figures— despite  a  known  infection  in  some 
of  the  animals.  Mr.  Morkel,  the  manager  of  the  Government  Cattle 
Farm  at  Ikomba,  gave  us  the  following  particulars,  which  afford 
valuable  evidence  regarding  the  effects  of  Gl.  morsitans  on  cattle  in 
one  part  of  this  territory. 
[ie  travelled  with  a  mob  of  800  head  of  Government  cattle  from  Ikomba  to 
Fort  Jameson,  starting  in  November,  1907.  The  route  followed  may  be  seen  on 
the  map.  Glossina  7norsttans  was  first  encountered  on  December  25th  near  Kabomba 
and  it  continued  practically  all  the  way  down  the  East  side  of  the  Loangwa  to 
Chinundu,  forty  miles  from  Fort  Jameson,  which  was  reached  towards  the  end  of 
March,  igo8.  At  Msikini,  where  a  week  was  spent,  fly  was  very  thick  and  at 
Chipandwi,  with  fly  all  round  the  village,  these  cattle  were  quarantined  for  six 
weeks.  Actually  twelve  weeks  were  spent  in  permanent  haunts  of  Gl.  morsilans  : 
the  cattle  marched  over  400  miles— roughly  200  of  which  was  in  ‘  fly ’—and  did  so 
m  the  middle  of  the  rainy  season,  with  daily  storms  and  several  rivers  which  had 
to  be  swum  across  and  they  arrived  in  Fort  Jameson  wdth  an  actual  loss  of  only 
eight.  Of  those  which  arrived  eighteen  were  believed  to  be  infected  (the  method 
of  examination  adopted  in  this  herd  is  not  known),  but  we  were  informed  bv  the 
Veterinary  Officer  that  after  a  rest  near  Fort  Jameson  the  mob  was  sent  on  to  its 
destination  in  Southern  Khode.sia  and  was  received  there  without  further  loss  It 
IS  to  be  noted  that  all  three  dogs  which  accompanied  Mr.  Morkel  died. 
It  is  assumed  as  a  result  of  Bruce’s  work  in  1896  that  animals 
ranking  as  game,  constitute  the  reservoir  from  which  Glossina 
abstract  infection,  that  they  are  what  Minchin*  and  Woodcockt 
term  natural  ’  hosts  for  the  trypanosomes. 
What  proportion  of  game  is  infected  cannot  yet  be  estimated ; 
a  very  small  percentage  apparently  shows  peripheral  trypanosomes, 
and  it  is  extremely  difficult  to  carry  animals  susceptible  to 
inoculation,  especially  since  small  laboratory  animals  would  fail  to 
demonstrate  at  least  two  organisms  pathogenic  to  domestic  stock, 
T.  vivax  {T.  cazalboiii)  and  Tr.  nanum.  The  number  of  head 
showing  trypanosomes  in  the  peripheral  circulation  is  certainly 
small ;  BruceJ  failed  to  demonstrate  them  in  Zululand  ;  Dutton,  Todd 
and  Kinghorn§  record  three  positive  findings  in  twenty-two  ;  and  we 
have  found  them  in  only  two  out  of  158  direct  examinations.  It  will  be 
detailed  later  that  inoculations  were  made  from  these  cases  and  from 
a  wart-hog  and  a  buffalo  shot  near  our  camp,  in  every  case  without 
result.  Bruce  s  inoculations  at  Ubombo  showed  approximately 
Minchin.  Proc.  Roy.  Soc.  Series  B.,  Vol.  79,  No.  528. 
•(.  Bruce.  Further  Report  on  Nagana.  London,  1897. 
§  Dutton,  Todd  and  Kinghorn.  Annals  Trop.  Med.  and  Parasit.,  Vol.  I.,  No.  2. 
