THE BIRDS OF MONGOLIA ETC. 89 



ones are to be met with throughout the summer there, as well as on the 

 Ussuri. In August it becomes again more abundant ; and in September and 

 the early part of October it was not scarce on the coasts of the Japanese Sea. 



237. Tringoides hypoleucos, L. Beregovnic serey. 



Sometimes it breeds at the rivers of S.E. Mongolia, is more common on 

 the Hoang-ho, but does not occur in Ala-shan. In Kan-su and Halha it was 

 met with only on its autumnal migration. It is extremely abundant in the 

 Ussuri country, and arrives at Lake Hanka in the middle of April, leaving 

 again in September. 



238. Recurvirostra avocetta, Bonn. Shiloduvka. 



This is a tolerably common spring migrant to S.E. Mongolia, about the 

 end of March, when it principally keeps to the shores of saltwater lakes, in 

 small flocks of from five to fifteen individuals ; and not being pursued, it 

 becomes tame. 



We found it breeding on the Yellow River, and noticed that the first 

 birds arrived in spring in Koko-nor on the 17th of March, where they were 

 not scarce throughout the month. 



It does not occur in the Ussuri country. 



239. Htmantopus candidus, Bonn. Hudulochnic acatJca. 



H. candidus breeds on the Hoang-ho only about small lakes and in 

 marshes. Some birds were observed on the 23rd of April, although others 

 might have been there before that date. 



The bend of the Hoang-ho most likely forms the northern limit of this 

 bird's distribution, as it has not been recorded either from Lake Baikal or 

 from the Amur. 



VOL. III. . o 



