TOWNSEND AND WETMORE : THE BIRDS. 175 



IxoBRYCHUS SINENSIS ASTRO LOGUS Wetmore (Proc. Biol. soc. 

 Washington, 1918, 31, p. 83. Luzon). Philippine Islands. 



IxoBRYCHUS SINENSIS BRYANi (Seale) {Ardctta hryani Scale, Oceas. 

 papers Bernice Pauahi Bishop mus., 1901, 1, no. 3, p. 27 Guam). 

 Guam, Marianne Islands. 



IxoBRYCHUS SINENSIS MOOREi Wetmore, Supra, p. 173, Uala, 

 Middle Caroline Islands. 



In the series examined other localities than those listed above are 

 represented only by birds in immature plumage whose subspecific 

 identification is somewhat uncertain until additional material is 

 available. There are without ciuestion several other races present, 

 so that the forms listed are gi^'en merely to render the treatment 

 accorded the Caroline Island bird intelligible. It may be noted that 

 another name is available for a form of this bittern as the bird from 

 the Andaman Islands has been described by Hume (Stray feathers, 

 1873, 1, p. 309) as (Ardctta) pulchra, but no specimens from that 

 locality have been available in the present study. 



ANATIDAE. 



10. Anas superciliosa pelewensis Hartlaub and Finsch. 



Anas superciliosa Gmel. var. pelewensis Hartlaub and Finsch, Proc. Zool. 

 soc. London, 1872, p. 108. (Pelew Islands). 



Two specimens were taken, in the Tonga Islands, a male at Nomuka, 

 2 December, 1899, and an adult bird with sex not marked, at Vavau, 

 5 December, 1899. The type-locality of Anas superciliosa Gmelin 

 is New Zealand and the bird from Australia which is distinctly larger 

 than the typical form has been separated by Mathews (Austr. avian 

 record, 1912, 1, p. 33) as A. s. rogcrsi. Polynesian birds (from Upolu, 

 Samoan Islands, Nomuka, and Vavau, Tonga Islands, and Tahiti)- 

 are similar in size to the New Zealand form, but differ from both .1. s. 

 superciliosa and A. s. rogcrsi in being distinctly darker below and in 

 having the throat, band on side of head, and superciliary stripe 

 pinkish buff. In superciliosa jDroper and in rogcrsi the buff' on these 

 areas is decidedly less rufescent. INIeasurements of the two specimens 

 in the present collection are as follows: — 



No. Sex Locality Wing Tail Culmen Tarsus 

 U. S.N. M. 212,167 o" Nomuka, Tonga Islands 217.5 75.2 48.0 43.0 

 212,168 ? Vavau, " " 240.0 42.6 44.5 



