344 
Research Fund) to be so good as to assist me in the description of 
the morphology of this trypanosome. The following paper is the 
outcome of our joint work.—[J. W. W. Stephens.] 
HISTORY OF THE STRAIN 
The trypanosomes used during this investigation were obtained 
from W.A., male, aged 26, a native of Northumberland, who was 
infected in North-East Rhodesia in September, 1909. It is necessary 
to set forth the itinerary of W.A. while in Africa, as he was never 
actually in an area infested with Glossina palpalis , so far as records 
are available, and indeed was never nearer (Kasama) than some 
eighty-six miles from such an area. 
Fie first went to South Africa in July, 1904, living in 
Johannesburg till the end of 1906. He then went to Salisbury for 
two years. About the end of November, 1908, he left Salisbury 
for North-Eastern Rhodesia, with a view to prospecting for 
minerals. The party consisted of two Europeans and ten natives. 
On the journey northwards he passed through Fort Jameson, 
Landazi, and Chinsali to Kasama, where he arrived about the 
beginning of June, 1909. During this northward journey, W.A. 
passed through an area infested by Glossina morsitans. He stayed 
two months at Kasama, a place from which we have no records of 
any species of Glossina * On the return journey he passed through 
Mpika (where Glossina morsitans occurs), Serenje (no records of 
Glossina), and Mzaza (where there is Glossina morsitans). He left 
Mzaza on September 10, and travelling along the Luangwa River he 
leached Feira on September 28. During this part of the journey 
he would pass through an area infested by Glossina fusca, between 
Mzaza and Hargreaves. 
He first fell ill on September 20, but after a rest of two days 
continued his journey. A short stay was made at Feira, and then 
the return journey was continued through the Hartley district to 
Salisbury, where it was found that he and one nativet were suffering 
from trypanosomiasis—parasites being found in his blood in Africa 
on November 17, 1909. 
* Bagshawc, S.S. Bulletin. No 18. June, rqio, p. 197. 
t The infection of the native, at first reported, has since been stated to be a mistake. 
