THE BIRDS 



OF 



MONGOLIA, THE TANGUT COUNTRY, 



AND THE 



SOLITUDES OF NORTHERN TIBET. 



By Lieut.-Col. N. PRJEVALSKY. 



[Continued from p. llO.j 



Order VI. GRALL^E (continued). 



286. Hydrochelidon nigra, L. KratcJiha chernaya. 



We found it breeding on the marshy Tsaidemin-nor lake. The young 

 were not fledged towards the end of July. Some stragglers were also 

 noticed by us in N orthern Ala-shan, but in no other locality visited by us 

 except the Lake-Hanka basin, where these birds breed in abundance. 



287. Hydrochelidon indica, Steph. Kratchka helosheJcaya. 



Gray, lUustr. Ind. Zool. i. pi. Ixx. fig. 2. 



We met with it only in the Hoang-ho valley, where it was breeding 

 abundantly at the Tsaidemin-nor lake. 



x2 



