the Birds of the Island of Formosa. 271 
231. Larus saunperst Swinh. 
Chroicocephalus kittlitzii Swinh. (nec Bruch.) Ibis, 1863, 
p. 428. 
Chroicocephalus saundersi Swinh. P. Z. 8. 1871, p. 273, 
ple xxin 
Larus saunderst Saunders, Cat. Birds B. M. xxv. p. 183 
(1896). 
Swinhoe says that Saunders’s Gull is a winter visitor to 
Formosa. 
232. Larus ripiBuNDUs Linn. 
Chroicocephalus ridibundus Swinh. Ibis, 1863, p. 428. 
The Black-headed Gull is also recorded on the authority 
of Swinhoe, but he does not appear to have procured any 
specimens. 
PROCELLARIID&. 
233. OcEANODROMA MONORHIS Swinh. 
Thalassidroma monorhis Swinh. Ibis, 1867, p. 386; id. 
P.Z.S. 1871, p. 422. 
Swinhoe’s Storm-Petrel breeds on the small islands north- 
east of Formosa. 
DIoMEDEID. 
234. DioMEDEA ALBATRUs Pall. 
Diomedea brachyura Temm.; Swinh. Ibis, 1863, p. 431. 
Diomedea albatrus La Touche, op. cit. 1895, p. 327. 
The Short-tailed Albatross is abundant in winter about 
the Pescadores Islands and in the Formosa Channel. 
235. DiomepEA NicRipes Aud. 
Diomedea nigripes Swinh, Ibis, 1863, p. 431. 
Swinhoe says that the Black-footed Albatross is abundant 
in the Formosa Channel at all seasons, 
CoLyMBID®. 
236. CoLYMBUS SEPTENTRIONALIS Linn. 
Colymbus septentrionalis Swinh. Ibis, 1863, p. 433. 
The Red-throated Diver visits the coast of Formosa in 
winter. 
