1911.] The Transmission of Trypanosoma nanum (Laveran). 7 

 Experiment 238. 



Date. 



1911. 

 Aug. 2—3 



' \ 5— Sept. 16 ... 



t. 17 



Sept. 18—21 



Sept. 22— 26 



Sept. 27 



Sept. 28— Oct. 3 



4—5 



on Goat 688 



Starved. 

 Fed on normal Calf 232 ... 



Starved. 



Fed on Dog X 



Fed on Dog 399 



Starved. 



Fed on Bushbuck 396 

 Starved and dissected . . 



61 aies alive on 30th 

 day. Calf showed 

 T. nanum 18.9.11. 



Dog X died 22.9.11. 

 Dog negative to try- 



panosomes for 27 



days. 



Negative to trypano- 

 somes for 20 days. 

 Eemaining flies, <? 16 



Note. — 65 flies dissected during this experiment. One female found positive (cf. Table II) . 



Experiment 243. 



Sept. 17 



Sept. 18—21 . 

 Sept. 22—26 . 



Sept. 27 . 



Fed on Dog 3 



Dog X died 22.9.11. 

 Dog negative to try- 



panosomes for 27 



days. 



Bushbuck negative 

 to trypanosomes 

 for 20 days. 



Note. — Total flies dissected in this experiment 112, of which 6 females 

 infected with flagellates (cf. Table II). 



It will be seen that in the above four experiments the 

 Calf 232, which became infected about September 10 



flies were fed upon 

 or 11. It is thus 



