Rosinson & Koss : Birds of West Sumatra. 243 
97. Collocalia fuciphaga fuciphaga (Thunberg). 
@. Muara Kiawai, Ophir Districts, 40 M. | 
26. Mt. Talamau, Ophir Districts, 400-2800 M. 
é. Sukamenanti, Ophir Districts, 200 M. 
Iris, bill and feet black. 
Wings, ¢ 118, 118, 119; ¢ 119 mm. 
The Sukamenanti bird is distinctly darker below than 
the others and in this respect agrees with the description 
of C. f. aerophila Oberholser, based on a single specimen 
from Nias Island: the wing, measured by that author’s 
method, is also of the same length as the type, viz. 115 mm. 
98. Collocalia linchi oberholseri Stresmann. 
2(?). Andalas, Tandjung, Padang Highlands, 
720 M. 
Iris, bill and feet black. 
Wing 104 mm. 
This specimen belongs neither to the typical form north 
C. Il. cyanoptila Oberholser, ranging from Borneo to the 
Malay Peninsula. We have therefore recorded it by the 
name given to birds from the adjacent island of North Pagi 
with the description of which it seems to agree. 
99. Collocalia innominata Hume. 
IRs Ge Uo IU, jo, SH) 
6 ad. 36 juv., 2 juv. Caves at Buo, Padang 
Highlands, 300 M. (April). 
Iris black, or very dark brown ; bill black, feet dull 
black. 
Wing, ¢ ad., 125 mm. 
The male has a brown rump band, not very marked, 
with dark shaft stripes : the band is present in two of the 
nestlings, but less clearly ; absent in the remaining two. 
As the adult agrees sufficiently well with numerous 
examples from the Malay Peninsula and differs from the 
Balun example, we think it is probably correct to record 
the series under the above name. 
Contents of stomach: small insects. 
The Cave of Buo is a natural tunnel, excavated by a 
river passing, in many meanderings, underneath a mountain 
range of limestone. The length of the tunnel is several 
miles and its walls are covered with the nests of these 
swifts. 
It is quite incomprehensible how the birds can find 
their way back to their nests in the absolute dark and 
amongst the bewildering noise caused by the twittering 
of hundreds of birds. 
