Reports to the Foreign Office. 1 5 1 
caused by the bite of the Glossina morsitcms occurs in places such as 
Mombasa, where Tsetse-fly and Buffalo are non-existent. 
I have, etc., 
(Signed) Robert J. Stordy, M.R.C.V.S. (Vety. Officer, E.A.P.). 
Nairobi, 
East Africa Protectorate, 
3rd September , 1901. 
To R. Stordy, Esq., M.R.C.V.S. 
Dear Mr. Stordy, — Many thanks for sending me the communi- 
cations you have received from Sir Charles Eliot, re the Buffalo and 
Tsetse-fly. 
That the two should be associated is not extraordinary when one 
remembers that both inhabit densely-wooded, damp, secluded districts, 
but the arguments advanced to prove that the Bos Caffa alone is the 
host of the Tsetse, and that the extermination of the former leads to the 
disappearance of the latter do not appear to me to be convincing. From 
my own observation I am inclined to the opinion that hosts other than the 
one species mentioned (or some other factors) are necessary for the 
propagation of the fly, and that the htematozoon is in all probability to 
be found in many species of diptera. 
During my residence in Jubaland, East Africa Protectorate, which 
extended over two years, I had ample opportunity of studying the habits 
and distribution of the Tsetse-fly and the effect it produced on domestic 
animals. 
Speaking generally, the fly belt is confined to two distinct areas in 
that province. 
(1) The valley of the Juba River within the forest belt. Here tiv 
abounds for a distance of upwards of 400 miles — in fact, so general 
is it in places that it is a source of annoyance to Europeans and natives. 
Yet within the whole of that great tract of country Buffalo are few and 
far between. The late Mr. Jenner and I came across them in one place 
only (Lake Daley and district). Within this belt is the district of Gosha, 
80 to 100 miles in length, where the fly is peculiarly abundant, yet Buffalo 
are not found ; notwithstanding this, the hacmatozoon is very virulent, 
and on the occasion of the late Mr. Jenner’s expedition to Lugh in 1890, 
he lost every camel and pack-ox that went through (vide my report, 
May 16th, 1899, forwarded to the Secretary of State for Foreign Affairs, 
No. 53, May 31st, 1899). 
(2) The region of Lake Kumbi to the north-east of Desek Waina 
(Lake Hardinge), where the distribution of the fly is restricted to the 
dense forest belt in the neighbourhood ; yet Buffalo are not known to 
frequent this district. It appears to me reasonable to assume that where 
fly is abundantly found extending over a large tract of country that its 
natural host (if one only) should be in large numbers also ; or else the fly 
must be possessed of extraordinary migratory powers. 
If that host be the Buffalo, it is strange that it is particularly 
conspicuous by its absence in the extensive districts mentioned, while 
waterbuck and bushbuck are common in most parts, and yet again in 
