_Adult male._--General colour above ashy; the head slightly browner, with indistinct brown shaft-streaks; least and median wing-coverts like the back; the median and greater coverts brown, edged with ashy brown, a little reddish on some of the outer greater coverts; quills brown, externally ashy or fulvous brown, the primaries and some of the innermost secondaries edged with pale whity brown; tail-feathers ashy brown, the feathers edged with paler brown; lores and a small patch above and below the eye dull white; in front of the eye a dusky spot; ear-coverts brown, slightly washed with fawn-colour, and contrasting with the ashy grey head; cheeks ashy grey, like the sides of the neck; entire throat white, strongly defined; remainder of under surface pale ashy brown; whitish on the lower abdomen, vent, and under tail-coverts; under wing-coverts and axillaries pale ashy like the breast, the lower coverts slightly tinged with fawn-colour; quills dusky brown below, pale ashy fulvous along the inner web. Total length 7·5 inches, culmen 0·55, wing 3·85, tail 3·1, tarsus 0·85. After a careful comparison of specimens I have come to the conclusion that the present bird is new to science. At first I thought it would be _B. murinus_, Finsch and Hartl., but the ear-coverts in that species are described as being like the sides of the neck and crop, whereas here the ear-coverts are in strong contrast; the under wing coverts also are not fawn-colour in Mr. Oates’s specimens. Having compared it with all the other species of _Bradyornis_ represented in the British Museum, I modify the “Key to the species,” given in my _Catalogue of Birds_, vol. iii., p. 308, as follows:-- _a._ Upper surface ashy or clear brown, not black. _a′._ Above light reddish brown, uniform; throat white, like the rest of the under surface; under wing-coverts white.--_mariquensis._ _b′._ Above ashy; throat white, contrasting with the ashy under surface; under wing-coverts like the breast.--_Oatesii._ _c′._ Above light brown, uniform; throat white, contrasting with the fawn-buff breast; under wing-coverts fawn-colour.--_pallidus_, _modestus_, etc. etc. The fawn-coloured under wing-coverts of _B. pallidus_, the ashy brown throat and chest of _B. chocolatinus_, the reddish brown upper surface, and entirely white under surface of _B. mariquensis_, successively prevent _B. Oatesii_ from being considered synonymous. A bird, determined as _B. murinus_, F. and H., from the Congo (Sharpe and Bouv., _Bull. Soc. Zool. France_, 1877), would appear to be the same as _B. Oatesii_, but is in worn plumage.] Family DICRURIDÆ. 117. BUCHANGA ASSIMILIS (Bechst.): Sharpe, _Cat. B._, iii. p. 247. African Drongo. _a._ ♀ Crocodile River, July 1873. Iris crimson. Beetles and grasshoppers in stomach. _b._ ♀ Tati, October 11, 1873. Iris crimson. _c._ Ramaqueban River, August 2, 1874. Iris deep red; bill, legs, and claws black.