ON A COLLECTION OF BIRDS FROM N. E. SUMATRA. 89 



12. Sterna tibetana, Saunders. 



Robinson and Kloss, p. 265. 



3 $ hiem., Pantai Tjermin, .Serdang, N. E. Sumatra, 5, 



7 th December, 1918 [Nos. 1270-2]. 



Wing, $ , 263, 254, 273 mm. 



Common in the Staits of Malacca in winter. 



13. Arenaria interpres(Linn.). 



1 9 , Pantai Tjermin, Serdang, X. E. Sumatra, 5th De- 

 cember, 1918 [No. 1254]. 



Wing, $ , 142 mm. 



14. Charadrius dominicus(P. L. S. Mull.). Antea p. 80. 



de Beaufort and de Bussy, p. 241. 



1 9 , Polonia, Deli, X. E. Sumatra, 13th October, 1918 



[JSTo. 1136]. 



4 $ , 19, Toentoengan, Deli, N*. E. Sumatra, ll-13th 



November, 1918 [1166-7, 1172-4]. 



Wing, $ , 155, — , 166, 165, — , 158 ; 9 , 158, 158, — mm. 



15. Ochthodromus geoffroyi(WagL). 



de Beaufort and de Bussy, p. 241. 



Aegialitis geoffroyi, Hartert, p. 218. 



3 8, 19, Pantai Tjermin, Serdang, N". E. Sumatra, 5th 



December, 1918— 5th January, 1919 [Nos. 1243-4, 



1344-5]. 



Wing, $ , 148, 136 (Worn), 142; 9 , 140 mm. 

 Separable at once from allied forms by its very much 

 larger bill. 



16. Ochthodromus mongolus pyrrhothorax (Gould). 



Ochthodromus pyrrhothorax de Beaufort and de Bussy, p. 

 242. 



17. Aegialitis alexandrina dealbata, Swinh. 



Charadrius alexandrinus dealbatus Hartert and Jackson, 



Ibis, 1915, p. 528; Kloss, Ibis, 1918, p. 85. 

 Aegialitis alexandrina de Beaufort and de Bussy, p. 242. 



2 $ , 19, Pantai Tjermin, Serdang. N". E. Sumatra, 4-5th 



December, 1948 [Nos. 1255-7]. 



Wing, $ , 108, 109 ; 9 , 103 mm. 



Exposed culmen, S , 17, 17.5 ; 9 , 17.5 mm. 



We consider that breeding specimens of this species oc- 

 curing on the Malayan area are all to be referred to M. a. 

 peronii while many winter visitors belong to the above race. 

 We have not met with 2E. a seebohmi or the typical JS. a. 

 alexandrina within our region. 



R. A Soc, No. 81, 1920. 



