6 



Dr. H. L. Duke. 



[Dec. 19, 



more readily upon the sheep, and, as will he seen below, a considerable 

 number of positive flies resulted. 



A brief recapitulation of each experiment is given below, the description of 

 the positive flies being dealt with in Table II : — 



Experiment 213. 



Date. 



Day of 

 expt. 



Procedure. 



Eesult. 



Kernarks. 



1911. 











July 21— 29 



1—8 







T. nanttm + + in 











Sheep 59 on July 











19, 21, 22, 25 



July 30 



9 



Starved. 







July 31— Aug. 16 ... 



10—26 



Fed on normal Calf 232 ... 







Aug. 17 



27 



Starved. 







Aug. 18— Sept. 5 ... 



28—46 



Fed on Goat 307 





54 flies alive on 30th. 









day of experiment. 





47 



Starved and dissected 





Eemaining flies, 3 10 











? 14. 



Note. — Of the 62 flies dissected during this experiment one female was found infected 

 {of. Table II). 



Experiment 235. 



Date. 



Day of 



Procedure. 



Eesult. 



Eemarks. 



1911. 



July 31— Aug. 3 ... 



Aug. 5— Sept. 16 ... 



Sept. 17 



Sept. 18—21 



1—3 



4 



5—47 

 48 

 49—52 

 53—57 



58 



Fed on Sheep 59 



Starved. 



Fed on normal Calf 232... 

 Starved . 



Fed on Dog X 



+ (?) 



T. nanum + + , in 



Sheep 59 on Aug. 



2 and 3. 

 62 flies alive on 30th 



day of experiment. 

 Dog X died 22.9.11. 

 Dog negative to try- 



panosomes for 27 



Eemaining flies, $ 2 

 9 27. 



Sept. 22—26 







Starved and dissected 







Note. — 83 flies were dissected in the course of this experiment and of these 4 females were 

 found to contain flagellates on the 58th day of the experiment (cf. Table II). 



