28 MR. R. SWINHOE ON THE BIRDS OF CHINA. [JuDC 23, 



415. Chhoicocephalus kittlitzii, Licht. 



Easily distinguished by its short, thick, black bill. It acquires a 

 deep-black hood in summer. I have it in both summer and winter 

 plumage from Amoy, where it occurs in large numbers the winter 

 through, ascending rivers at fall of tide in search of moUusks and 

 small crustaceans. It is said to summer in Kamtschatka and N.E. 

 Asia. 



416. Chhoicocephalus sabinii. Leach. 



417. Chroicocephalus minutus. Pall. 



Both birds of the British lists. I introduce them from the fact of 

 MiddendorfF stating that they occur on the shores of the Sea of 

 Ochotsk. 



418. Lestris pomarina, Temm 



419. Lesteis paeasita, Boie. 



420. Lesteis buffonii, Boie. 



421. Rhynchops albicollis, Swainson 



Said by MiddendorfF to occur 

 on the shores of the Sea of 

 Ochotsk. None of them have 

 yet been obtained in China. 



Southern Ocean. Said occasionally to occur on the coast of 

 Southern China. 



422. Sylochelidon caspia. 



Sterna caspia, Latham. 



Sylochelidon strenuus, Gould, B. of Austr. 



Visits the coasts of China in winter. I have specimens from Amoy, 



423. Gelochelidox anglica. 

 Sterna anglica, Montagu. 



Said to wander occasionally to the coast of South China in winter. 



424. Hydeochelidon indica. 



Viralva indica, Stephens. 

 Sterna hyhrida, Pallas. 

 S. leucopareia, Natterer. 



A common resident on the marshy plains of S.W. Formosa. I 

 have not observed it elsewhere in China. 



425. Hydeochelidon nigra. 



Sterna nigra, L. 

 S. fissipes, Pall. 

 S. leucoptera, Temm. 



Found throughout China, into Amoorland. I have a specimen in 

 full summer plumage from Amoy, and several in a variety of plumages 

 from near Pekin. 



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