VOYAGE UP WHITE NILE 
77 
czthiops) weighing, male, 12I, and female, 10 lb. respec¬ 
tively. I preserved the three skins and my men ate the 
flesh. In 1919 I shot one of a curious fulvous colour. 
I smile now recalling that strenuous effort to secure 
the two first-seen grivets! for we subsequently found 
them abundant enough both on Blue and White Niles, 
and had no difficulty in procuring any specimens required. 
The same morning, thinking I saw something move 
Grivet Monkey. 
in the bush, I ran forward, but quickly realised that the 
suspect was a savage female—human! Instantly she had 
seized up a toto and plunging into a thicket, vanished 
from view as smartly and effectually as the “old man” 
monkey had done an hour before. 
The Seroot-Fly. 
“And it shall come to pass in that day, that the Lord shall hiss for the 
fly that is in the uttermost part of the rivers of Egypt.” —Isaiah, vii. 18. 
This insect-terror first appears in the region of Kosti 
bridge, some 170 miles south of Khartoum, and thence 
forwards forms a perpetual menace to peace. In general 
appearance the seroot ( Tabanus) resembles a clegg but is 
quite twice as large. 
