no THOMPSON YATES AND JOHNSTON LABORATORIES REPORT 
of Leisha, a wood post some four days' steaming above Stanley Pool, I noticed one of the men, who as- 
usual in addition to shoes and socks wore nothing on his legs more protective than a thin pair of trousers, 
holding between his finger and thumb a fly which I recognized as a Tsetse and immediately secured. It , 
had been biting the man's ankle, and its abdomen was half full of blood. The man assured me that there 
was very little pain or irritation, but within ten minutes a large swelling arose obliterating the malleolus. 
In the morning this had somewhat subsided, but in its centre was a very distinct purple mark, as of a 
bruise, surrounded by a greenish-yellow area. During the next five day two more specimens of Glossina 
fusca were caught, I believe, by the same individual, at the same place and under precisely similar circum- 
stances, but these I am sorry to say never reached me. Leisha wood post is on the bank of the river, 
surrounded by forest, and when I camped there for two days in April in the rainy season, Glossina palpalis 
and a large Simulium bit unmercifully from morning till night. At this post there were two advanced 
cases of sleeping sickness. 
' A few days before the above occurrence, on my way up river on one of the small stern-wheelers, we 
found ourselves one afternoon tied up to the bank, while all the available hands on board were set to work to 
cut wood for our next day's steaming. At dinner that evening I wore, as a protection against mosquitoes, 
a pair of thin putties beneath my flannel trousers, and afterwards sat talking in the dark on deck. 
Towards I I p.m. I felt a severe bite through the puttee, and, putting my hand to the spot, caught a 
Tsetse full of blood. By the light of the lamp in the saloon I recognized the fly as Glossina fusca, but 
unfortunately allowed the insect to escape while trying to put it into a tube. A quarter of an hour after- 
wards the swelling from this bite had extended nearly round my ankle. I experienced scarcely any pain 
or irritation, and in the morning the swelling had almost subsided, though the purple and yellow stain 
described above remained for days. 
' On my return to Leopoldville Dr. Dutton, before I had said anything about Glossina fusca, told me 
that while I had been away a certain official from higher up the Congo, who had taken some interest in 
biting flies, had, while visiting the laboratory, volunteered the information that the larger of the tv\o 
species of 'mvakwa ' — the native name for the Tsetse — bit at night, an assertion of the greatest interest 
in the light of my experiences up-river.' 
It may, perhaps, be remembered that specimens of Glossina fusca found by Captain 
Craws hay sitting on a path at Kaporo, at the north end of the Lake Nyasa, at sunset 
in February, 1895, did not bite (Monograph, p. 289). In view of Dr. Christy's 
observations, their failure to do so cannot have been due to the fact that they were 
not met with in the heat of the day, as previously suggested by the writer 
(Monograph, p. 99). 
Glossina longipennis (Corti). 
Of this species the only specimens received since the publication of the Monograph 
are a male and female collected in the East Africa Protectorate on the Uganda 
Railway in 1903, by Captain E. D. W. Greig, I. M.S., and presented by Colonel 
Bruce ; of these the male was obtained at Kibwezi station in thorny bush. 
It was pointed out in the Monograph (p. 103) that Glossina longipennis 'is the 
Tsetse-fly of Somaliland and the adjacent regions, but that its range overlaps that of 
Glossina fusca (Walk.), somewhere in the vicinity of the Sabaki River.' Dr. Brumpt 
states 8 that Glossina longipennis was the only species of Tsetse met with by him in 
Somaliland between July and October, 1901. According to the same author 9 this 
