admit of Its being made into a skin for scientific purposes. It will be noticed that
Lolonel Grant mentions a second kind ot Swallow as observed by him along with
1 . albiceps at Usui. This bird has given rise to all kinds of conjectures as to the species
observed by the travellers. Drs. Finscli and Uartlaub suggested that Grant’s smaller
)lack Swallow might possibly be Psalidoprocne obscnra, and the late Baron von Heuglin
appears to have liad scarcely any doubt on the subject; but we were careful to suggest
111 1870 that It was just as likely to bave been the female of P. albiceps.
Nearly thirty years elapsed since Colonel Grant shot the first specimen of the
V\ Jiite-headed Swallow before examples of the species were again obtained. It is to
Lmm Pasha tbat we owe its rediscovery, for he forwarded in 1887 to the British Aluseum
three specimens procured by liim in the neighbourhood of Wadelai. An adult male,
killed ou the 28th of June, is iu worn plumage and is moulting, as is also a female
obtained on the 5th of July. The white feathers on the crown in the latter specimen
are so much abraded that the dusky bases of the feathers show through on the sinciput
and hmder crown, and give tbe head a spotted appearance.
The young bird, obtained by Emin Pasha in December, is uniformly smoky black,
)ut lias a good many white feathers on the crown and throat. Before the white feathers
appear, it is evident that the young birds must be perfectly uniform, and it is most
likely that the smaller black Swallow observed by Colonel Grant was the young of
P . albiceps, whicli would probably be flying about with the parent birds in October, as
Emm Pasha’s specimen is only beginning to assume tbe adult plumage early’ in
December. The young bird in its uniform plumage bears some resemblance to the
aduit of P . holomelisna-, but it is altogether a browner bird, and lias not the bottle-green
gloss which distinguishes the last-named bird at all seasons.
The figures in the Plate represent an adult and a young bird. They have been
drawn from the specimens sent by Emin Pasha, and the descriptions have been taken
irom tlie same individuals.
APPENDIX
G E N U S P S A L I D O P R O C N E .
Add
P S A L I D O P R O C N E H O L O M E L i E N A [ a n t e à . p im i
Psalidoprocne holomelmia, Sharpe & Wyatt, Monogr. Iliruntl. pt. iii. (1886).
For the geographical distribution of this species, vide infrd, Plato 123 [Map].
P S A L I D O P R O C N E O B S C U R A [anted, p. 607].
Add
Psalidoproem ohsonra, Sharpe & Wyatt, Monogr. Hirund. pt. i. (1885); Reichen.
«J. t. (J. 1891, p . 381.
R e c o h d e d from Togo Land b y Dr. Reichenow.
, Por the geographical distribution of this speeies, vide infrd, Plate 12-1. [Map].
P S A L I D O P R O C N E N I T E N S [«nfe«,p.ou].
A d d : - ■'
P‘- (1888); Reichen.
J . I . U . 1 8 9 0 , p . 1 1 7 .
Por the geographical distribntiou of this species, vide infrd, Plate 1 2 3 [Map].