44 U.S. NATIONAL MUSEUM BULLETIN 226 



Range: A visitor from central Asia, reported on migration or in 

 winter only from Bangkok. 



Genus GELOCHELIDON C. L. Brehm 



Gelochelidon nUotica nilotica (Gmelin) 



[Sterna] nilotica Gmelin, Caroli a Linne . . . Systema naturae, 

 ed. 13, torn. 1, pars 2, 1789, p. 606 (Egypt). 

 Range: A visitor from western Asia, reported on migration or in 

 winter along the eastern coast from Chon Buri to Naldion Si 

 Tliammarat. 



Genus HYDROPROGNE Kaup 



Hydroprogne caspia (Pallas) 



Sterna caspia Pallas, Novi Comm. Acad. Sci. Imp. Petropolitanae, 

 vol. 14, pt. 1, 1770, p. 582, pi. 22, fig. 2 (Caspian Sea). 

 Range: A visitor from western Asia, reported on migration or in 

 winter from Samut Sakhon. 



Genus STERNA Linnaeus 



Sterna aurantia J. E. Gray 



Sterna aurantia J. E. Gray, Illustrations of Indian zoology, vol. 



1, pt. 5, Jan. 25, 1831, pi. 69, fig. 2 (India). 



Range: Reported only from the rivers Mae Khong (north as far as 

 Chiang Rai) and Mae Ping (mainly below the Gorges). 



Sterna hirundo tibetana Saunders 



Sterna tibetana Saunders, Proc. Zool. Soc. London, for 1876, pt. 



3, October 1876, p. 649 (Tibet). 



Range: A visitor from central Asia, reported on migration or in 



winter along the eastern coast from Samut Prakan to Nakhon Si 



Thammarat, along the western coast from Phuket to Satun, and up 



the river Chao Phaya as far as Pathum Thani. 



Sterna dougallii bangsi Mathews 



Sterna dougallii bangsi Mathews, Birds of Australia, vol. 2, pt. 4, 

 Nov. 1, 1912, p. 364 (Fuchow, Fukien Province, China). 

 Range: Reported from islets of the Inner Gulf off Chon Buri and 

 others in the neighborhood of Ko Phangan and Ko Samui. 



Sterna sumatrana sumatrana RafBes 



Sterna Sumatrana Raffles, Trans. Linn. Soc. London, vol. 13, pt. 



2, [not earlier than] November 1822, p. 329 (Sumatra). 

 Range: Reported from islets off the eastern coast from Chon Buri 



to Nakhon Si Tliammarat, and also from the western coast (Phuket) . 



