24 BULLETIN 159, UNITED STATES NATIONAL MUSEUM 



Family STERNIDAE 



THALASSEUS BERGII PELECANOIDES (King) 



Sterna pelecanoides King, Narrative of a survey of the intertropical and western 

 coasts of Australia, vol. 2, p. 422, 1827. ("Australia" [i. e., Torres Strait, 

 northern Queensland].) 



Two specimens, from Pulo Laut. Both these are nearly adult, and 

 are molting some of their contour feathers. In color they are identical 

 with birds from the Anamba Islands, but are rather larger. ^^ They 

 were shot out of a flock of 200 or 300 sitting on a sandbank. They 

 measure as follows: 



Table 2. — Measurements of specimens of Thalasseus bergii pelecanoides 



> Measured in the flesh by the collector. 



Doctor Hartert states in his account of the second Natuna collec- 

 tion examined by him that the present species was "common on all 

 the islands, "^^ by which statement we assume him to mean Bun- 

 guran Island, Pulo Laut, Pulo Pandak, and Pulo Panjang. 



•STERNA SUMATRANA SUMATRANA Raffles 



Sterna Sumatrana Raffles, Trans. Linn. Soc. London, vol. 13, pt. 2, p. 329, 

 Nov. or Dec, 1822. (Sumatra.) 



This species, doubtless the present subspecies, has been recorded 

 by Doctor Hartert ^^ from Bunguran Island and Pulo Pandak, under 

 the name Sterna melanauchen. 



*STERNULA ALBIFRONS SINENSIS (Gmelin) 



[Sterna] sinensis Gmelin, Systema naturae, vol. 1, p. 608, pt. 2, Apr. 20, 1789. 

 ("Sina.") 



Recorded from Pulo Laut by Doctor Hartert.^* 



'• For a synopsis of the races of Thalasseus bergii, and the reasons for the employment of the above-given 

 name, see Oberholser, Proc. U. S. Nat. Mus., vol. 49, pp. 515-526, Dec. 23, 1915. 

 " Nov. Zool., vol. 2, no. 3, p. 478, Aug. 17, 1896. 

 " Nov. Zool., vol. 2, no. 3, p. 478, Aug. 17, 1895. 

 " Nov. Zool., vol. 2, no. 3, p. 478, Aug. 17, 1895. 



