on Dr. Jerdon’s ‘Birds of India.’ 339 
from time to time, not constantly, as does H. rustica ” (J. A. S.B. 
xxiv. p. 2 77.) 
95. Acanthylis sylyatica. 
The A. leucopygialis, nobis (J. A. S. B. xviii. p. 809), from 
Pinang (referred to), is, in all probability, identical with A. 
coracma, Muller, from Borneo. 
97. Acanthylis ciris ; Hirundo ciris, Pallas ; II. caudacuta, 
Lath. Other synonyms are given in Gould’s ‘ Handbook of the 
Birds of Australia/ i. p. 103. 
Referring to Pallas’s description, I see no reason to hesitate 
about assigning this bird as above. Examples from the Himalaya, 
China, and Australia are specifically identical; but Mr. Layard’s 
supposed A. caudacuta from Ceylon is A. gigantea . 
99. Cypselus apus. 
An Indian specimen received from Dr. Jerdon (I presume 
from the N.W.); and the India Museum has it from Afghanistan. 
Cypselus acuticauda, nobis (Jerdon Supplement, p. 870, 
/ and ‘Ibis,’ 1865, p. 45), must be added. A single specimen, 
obtained in Nipal, is now in the Derby Museum of Liverpool. 
It is probable that both this and C. leuconyx are often mistaken 
on the wing for C. apus. 
100. Cypselus appinis, J. E. Gray; C. abyssinicus, Streubel; 
C. galilceensis, Antinori (cf. Ibis, 1865, p. 234). 
This non-migratory Swift is probably diffused over all suitable 
parts of Arabia, which would connect its Indian range with its 
distribution in Africa and in Palestine. I have not seen it from 
the eastern side of the Bay of Bengal; but in the Malayan 
peninsula (at Pinang) it is replaced by C. subfurcatus , nobis 
(J.A.S.B. xviii. p. 807), which also occurs in South China, and 
therefore doubtless in the intervening countries of Siam, Cambo- 
gia, Cochin China and Anam. According to Mr. Swinhoe C . sub¬ 
furcatus is “ resident on the Chinese coast, not much higher than 
Amoy ” (P. Z. S. 1863, p. 264). I believe that it is also resi¬ 
dent at Pinang; but Mr. Layard asserts that C. affinis is 
migratory in Ceylon, a fact which has nowhere been observed 
on the mainland of India; and Mr. Tristram records that it is 
