586 Capt. H. L. Cochrane on the 



192. Mergus albellus (L.). 

 1911. March 5 (on river). 



1913. March 20 (8). April 1 (30), 8 (2). 



193. Ducks sp. 



1911. March 4 (2 or 3 flocks), 5 (several flocks), 16 (many), 19 (a 



great many), 20 (thousands), 21 (many), 22 (several), 

 23 (a few on the ponds), 26 (many flocks), 31 (a few flocks). 

 April 3 (2 small flocks), 4 (numbers), 6 (a great many), 

 9 (a flock), 11 (a few flocks), 12 (many on ponds), 13 (a few). 

 May 3 (1 flock), 5 (a few). 



1912. Feh. 27 (a great number on the sea). March 7 (many 



reported flying backward and forward), 11 (a great many), 

 16 and 17 (many), 19 (a few), 21 (1 flock), 22 (a few flocks), 

 25 (1 flock), 29 and 31 (many on ponds). April 7 (1 flock), 

 9 (1 flock), 21 (seen). 



1913. March 5 (1 flock), 15 (1 flock), 19 (great numbers), 21 and 



22 (many), 26 (passing port), 28 and 29 (many of all kinds 

 at Hsieh Chia Ying). April 13 (a few). May 31 (2 flocks 

 of 40). 



; c 



XXXVI. — A Note on the Breeding of the White-rumped 

 Swift (Micropus pacificus). By Capt. Henky Lane 

 Cochrane, R.N., M.B.O.U. 



(Plate XXV.) 



As there appears to be little published information on 

 the subject of the breeding of the White-rumped Swift, 

 a few observations made recently off the north-eastern 

 coast of China may be of interest. 



These beautiful birds are very abundant during the 

 summer months on the Shantung littoral, and may be seen 

 on a fine evening, flying over the summits of the rocky hills, 

 hunting their prey, with a moderate amount of subdued 

 screaming. 



It was known that they bred in the neighbourhood, 

 possibly among the many rocky ravines, though searches 

 had proved inefi'ectual ; also, it is on record that a breeding 

 place in the shape of a rocky island had been visited, where_, 



