7 o 
If they were left without an opportunity to feed for much more 
than 24 hours they died very quickly, about Qi per cent in 37 hours 
Neither sex seemed particularly resistent. 
To feed the flies the cage was simply pressed against an infected 
person or animal, and so long as the victim kept fairly still the die- 
, . . ” A * tt,HOD OK Fkr ,Tskt.sk Kues 
ted without difficult v Tl , - 
and practically the same ^ . S n ° P refer ence for human 
( man * monkey, guinea-pip- J CenUj?c ot n,es fe d on whatever a 
0 .. 
; 111 aVera ^ e 80 per cent, of ouTffie^f thousand fl,e5 
" cases, when great care ' "" When ,he °PP°rtunity ol 
Perfectly stiU and the L! L Z '° k «P an.mal and 
Ifrl P" Cen ‘ ages "ere obtam^ P 7 S ‘ Sted in for some hours, 
r o h :f had partially Z 7 t ed fr r ent '- V - per cent, 
at once resume their mea on ^ could often be pers, 
° n a Se “ nd animal, „ was p ra c 
