1917.) H.C. Ropinson: Birds from Pulau Langkawt. 155 
This species [with the exception of C. gigas, Hartert and 
Butler,* which is only known from two specimens, the type from 
the Semangko Pass and another from Java (wing 157 mm.)], 
is the largest of the local species. The two specimens listed 
above have wings of 129 and 131 mm. It is common on the 
mountains from Larut in Perak to Selangor and has also been 
obtained on the coast of Selangor at Tanjong Karang. 
50. CYPSELUS SUBFURCATUS, Blyth. 
Micropus subfurcatus, Hartert, Cat. Birds Brit. Mus. 
XVl, p. 456 (1891). 
Apus affinis subfurcatus, Hartert, Vog. Pal. Faun. i, 
p. 843 (1912). 
a—b. 2 Koh Muk (Pulau Muntia), Trang, S. W. 
Siam. 5th January, 1917. Nos. 3855, 6. 
“Tris and bill black, feet dark purplish flesh, toes 
black.” 
This species was exceedingly common on the cliffs of Koh 
Muk, where it built its untidy nests made of feathers and grass 
stems in the cracks of overhanging rocks at varying heights 
above the sea while the Collocalia built far inside the caves in 
total darkness. 
While dealing with this genus it may be mentioned that 
the male of Cypselus pacificus obtained on Kedah Peak in 
December, 1915 ‘antea vol. vi, p. 226) agrees in all its charact- 
ers with the subspecies C. pacificus cooki, described by Major 
Haringtont from Goteik, Northern Shan States, where it was 
found breeding. 
Our bird has the wing 163 and outer tail feathers 83 
against 170 and 75 in the type, the white rump band very 
narrow with black shaft stripes and the white of the throat 
much restricted with marked shaft stripes, the mantle deep 
glossy black. These characters however occur also, though 
to a lesser degree, in a bird from the Semangko Pass shot 
in February, 1908. 
It appears to me not improbable that Harington has com- 
pared a very adult bird in fresh pelage (his specimen was 
breeding) with younger birds. The size is not materially more 
than that of Malayan specimens, which vary from 163-176, 
while Hartert (loc. cit) gives 176-184.5 for the wing of the 
species as a whole. 
Specimens from Koh Pennan, shot in May, are much 
browner and duller. 
51. CACOMANTIS SEPULCHRALIS SEPULCHRALIS (S. Miill.). 
Cacomantis sepulchralis (S. Miill.); Finsch, Notes 
Leyden Museum XXII, p. 82 (1900). 
Cacomantis merulinus (part.) Shelley, tom. cit. p. 268. 
* Bull. Brit. Orn. Club. XI. p. 65 (1901). 
+ Bull Brit. Orn. Club. XXXII, p. 57 (1913). 
