450 NILAUS 
Somaliland—Gedais (L. Phillips), Daro (Gillett), Waghar 
and Burao (Bury), Upper Sheikh (Hamerton) ; Abyssinia and 
Shoa—Billin and Miessa (Degen), Magois country (D. Smith) ; 
Egyptian Sudan—Uado (Emin); British EH. Africa—Waso 
Nyro, Msara near Kenia, Lake Baringo (Delamere), Ukambani 
(Ansorge), Kibaradje on the Tana (Fischer), Duruma near 
Mombasa (Hildebrandt); German EH. Africa—Kilimanjaro 
(Percival), Mamboio (Kirk) ; north of Lake Nyasa (Sharpe). 
Genus II. NILAUS. 
Bill greyish black, deeper than broad with a strong hook and a slight 
notch; nostrils exposed; no rictal-bristles. Wing less than 3°8 inches, 
pointed ; primaries 3 and 4, about equal and the longest, 2 shorter than 6, 
1 not half the length of 2 and much shorter than the secondaries. Tail 
nearly square and shorter than the wing. Tarsi with the sides and back 
finely scaled. 
Type. 
Nilaus, Swains. Zool. Journ. iii. p. 162 (1827)... . . . . N. brubru. 
The genus is confined to Tropical and South Africa and comprises six 
species. 
KEY TO THE SPECIES. 
a. A whitish eyebrow extending back to the side of the 
nape. _ 
at. A chocolate-coloured band down the side of the 
breast. 
a?, Flank band broken up into a series of streaks ; 
white of the wing and back strongly washed 
Wwithybutlv, eee wate weanatens 
62, Flank band continuous a Contact: pals of 
the wings and back gee showing any Beer - 
Wash i. fa) camerunensis. 
bt, Sides of breast bright ci cinnamon chestnut “little or 
no shade of buff on upper parts. 
c?, Larger ; wing about 3:5 inches .... . . Orubru. 4 
d?, Smaller; wing about 3-Oinches. . . . . minor. 
b. White eyebrow not extending back behind thes eye. 
ct, A broad chestnut band down each sideof thebreast . migritemporalis. ~ & | 
d+ Entire plumage black and white . .... . . . affnis. 
