LANIUS LEUCOPYGOS 273 
but distinct frontal band over the bill; rump and most of the tail-coverts 
white ; wings black and white, the primaries with the basal half white 
forming a conspicuous speculum, the inner secondaries white on the inner 
web and tip, the black mainly confined to a streak on the outer web along the 
shaft ; tail with the outer pair of rectrices entirely white, the fifth pair chiefly 
white, sometimes with a little black patch on the inner web and a black 
shaft; below pure white, no grey or rosy; axillaries and under wing-coverts 
white. Iris brown; bill and feet black. Length about 9:0, culmen 0-6, 
wing 3°95, tail 4°35, tarsus 1:0. Senaar (Kotscky). 
The white rump, pure white under parts and large amount of white on 
the tail and secondaries, and small size at once distinguish this species. 
The White-rumped Shrike is found in the Upper Nile valley 
from Dongola upwards to Kordofan and Sobat, on the White 
Nile, and to Roseires on the Blue Nile, where it seems to be a 
resident ; from the Nile its range appears to extend westwards 
to the Lake Chad district. Here three typical examples were 
procured by Alexander at Yo, October 8, at Damakuldie, 
November 23, and at Mongamin, November 28, 1905. The 
type is said to have come from Dongola, and Butler has taken 
examples at Khartum in February. He writes: “This con- 
spicuous Shrike is fairly common and of wide distribution. I 
find from my notes that I met with it almost daily between 
September 7 and May 11, from the Setit, across to western 
Kordofan, and up the Nile as far as the Sobat Junction. 
During the remaining months of the year I have generally 
been away, but as it was not to be seen at Khartum just 
before the first week in September, and then became suddenly 
abundant, I had formed the idea that it was a migrant, and 
did not breed in the country. However, on March 31, 1904, 
at the Mazrub Wells in western Kordofan, I came on two 
bob-tailed young birds sitting on a thorn ‘ zariba,’ and watched 
the parents feeding them for some time. This Shrike is quite 
at home in any desert where there are thorn-bushes for it to 
settle on, and along stretches of fifty and seventy miles 
without water I have noticed it the whole way.” 
