UROLONCHA CANICEPS 161 
KEY TO THE SPECIES. 
a. Rump and upper tail-coverts white; breast rufous buff . . . caniceps. 
b. Rump and upper tail-coverts black; breast white . . . . . cantans. 
Uroloncha caniceps. 
Pitylia caniceps, Reichen. Orn. Centralbl. 1879, p. 189; id. J. f. O. 1879, 
pp. 326, 352, pl. 2, fig. 3 Nassa. 
Uroloncha caniceps, Sharpe, Cat. B. M. xiii. p. 356 (1890); Shelley, 
B, Afr. I. No. 363 (1896). 
Spermestes caniceps, Reichen. Vog. Afr. iii. p. 154 (1904). 
Adult. Head and upper neck grey, with a few whitish tips to the frontal 
feathers ; remainder of the neck and the mantle pale cinnamon ; lower back 
and upper tail-coverts pure white; tail black, the outer pair of feathers 
whitish towards the end of the outer web; wings, with the coverts, scapulars 
and inner secondaries slightly darker brown than the upper back; 
remainder of the quills blackish brown, with the inner webs tinted with 
rufous; under wing-coverts rufous buff; in front of the eye black; feathers 
of the cheeks, ear-coverts and region of the chin, with white tips and black 
subterminal bars, giving these parts a closely spotted appearance; the pale 
cinnamon of the lower neck gradually fading into buff on the lower breast, 
thighs and under tail-coverts. ‘‘Iris brown; bill bluish grey; feet greyish 
brown.” ‘Total length 4-7 inches, culmen 0:4, wing 2:35, tail 2-0, tarsus 0-55. 
g, 28. 4. 81. Tarrangola (Emin). 
The Grey-headed Silver-bill replaces U. cantans in the 
Victoria Nyanza district, from the south of that lake to 
5° N. lat. 
The type, a female, was discovered at Nassa on Speke’s 
Gulf, by Fischer, who procured a cock-bird in like plumage 
in the adjoining Wembere country. Mr. Jackson has met 
with the species to the north-east of the lake, and writes: 
** First seen in small flocks of from eight to ten at Karahan, 
in Suk. Feeds on minute grass-seeds.’”’ Lord Delamere has 
met with it at the Waso Nyro River, and Emin at Tarrangole 
and at Lado, which is the most northern range known for the 
species. 
