SUPPLEMENTARY NOTES ON THE TSETSE-FLIES 
107 
Specimens of Glossina morsitans from one or two new localities have been received 
at the- British Museum since the publication ot the author's Monograph. These 
include seven males and five females from the Mwangazi River, on the borders of 
North-Eastern Rhodesia and Portuguese East Africa (latitude \\ \d S., longitude 
32 0 30' E.) ; presented by Mr. Robert Codrington, Adminstrator of North-Eastern 
Rhodesia. Besides these, Mr. W. F. Gowers has forwarded a series of individuals of 
both sexes, taken by himself near Yola, Northern Nigeria, on October 10, 1903, and 
March 12, 1904. In a letter to Professor Ray LankesteR dated 'Yola, October 21, 
1903,' Mr. Gowers writes as follows : — 
'These specimens were ought about twenty-five miles north of Yola (the exact locality being' 
9 0 36' 40" N. latitude, and 12° 41' 20" E. longitude), on the bank of the River Loko, a small tributary 
of the Benue, at the place where it is crossed by a w ell-used native path. There is here a belt of large 
trees with thick undergrowth, and, so far as the road is concerned, the fly appears to be confined to this 
belt, which is not more than one hundred yards across. I cannot yet say how far it extends into the 
bush to the east and west (the road runs nearly north and south)- To the north, east, and south of this 
spot are man)- farms and villages. There are cornfields within two or three hundred yards, and a village 
not more than half a mile away. To the west is a stretch of uninhabited bush where game, including 
buffalo, is said to be plentiful, but there is no indication of game 111 the immediate vicinity, and it 
is not likely that it exists, at any rate in an)' quantity, 111 the neighbourhood of the road and cultivated 
land. 
'The fly is found here in considerable numbers ; altogether about one hundred were secured in two 
hours by tying up a horse there as "bait." 5 . . . I have no absolute proof at present that the bite is 
fatal, but the local natives all agree that cattle, horses, and donkeys are killed by it, while it is harmless 
to sheep and ,dogs 6 ; the reason, however, given for the immunity of the sheep is that it is protected by 
its wool. I am going to test its effect on the latter two animals. Within a radius of three or four miles 
from the spot where the flies were caught no cattle are kept, the alleged reason being that the fly prevents 
it. Natives travelling with horses or cattle avoid this part of the road by making a detour to the east. 
Death is said to ensue from the bite in from one to three months, and from descriptions I gather 
that the symptoms are very much the same as in the case of fly-disease in South Africa. I fancy that 
Tsetse-fly will be found to be pretty well distributed throughout the southern portion of Northern 
Nigeria.' 
In addition to the foregoing, a single female, presented by Colonel Griffiths, 
Chief Veterinary Officer, Egyptian army, has been received from the Pongo River, 
between Wau and Dem Zibehr, in the Bahr-el-Gazal Province, Egyptian Soudan, 
where it was taken in 1903. Since this is another new locality for the species, it 
may be worth while to add that the place of origin is in Goro, west of the Rol 
country, near the intersection of the twenty-seventh parallel E. long, and eighth 
parallel N. lat., and that the fly is said to be very abundant there. Other specimens 
of Glossina moristans, collected by the donor in North- Western Rhodesia in 1899 and 
1902, have been presented by Mr. Val Gielgud. 
