610 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 54. 



not give any definite locality, but Buturlin^ seems to restrict See- 

 bohm's form to the " middle course of the Yenisei, from Krasnoyarsk 

 to the confines of the forest and westward to the Government of 

 Tobolsk and southeast to the Government of Sokutsk," Seebohm's 

 type should be in the British Museum, but until some competent 

 ornithologist examines it and fixes the name there is nothing to do 

 but accept Buturlin's disposition of it. Fortunately the United 

 States National Museum possesses a female from the Yenisei of 

 Seebohm's own collecting. This is the bird I referred to^ as prob- 

 ably representing a new form when I was under the impression that 

 the Manchurian bird was true T. 1). septentrionalis. 



The Yenisei specimen when compared with T. h. holymensis is 

 not so gray above and the white markings on the wings and the 

 white bars on the feathers below are more restricted ; the dark bars 

 to the feathers on the underpart of T. h. holymensis are also darker 

 and heavier. The United States National Museum has recently ac- 

 quired two specimens of Tetrastes from Sakhalin Island. They 

 agree with a specimen from the mouth of the Amur River (near 

 Nikolaievsk). This Amur specimen is slightly grayer above than 

 the two males from I-mien-po, Manchuria (the type and cotype of 

 my T. h. amurensis), but not different enough in my opinion to war- 

 rant a separate designation. From the above I would also place the 

 T. h. ussuriensis Buturlin in the synonymy of T. h. amuriensis, as it 

 hardly seems probable that two forms can inhabit practically the 

 same country. Nearly all species of grouse have two phases of 

 plumage, a red and a gray; but they are not distinct forms in the 

 general acceptation of the term, as Buturlin seems to imply, but 

 variations. In some parts of a species' range one of the phases 

 may be lacking. This seems to be the case with T. J?, holymensis^ as 

 there are no birds of the red phase in the series before me. 



Does not occur below Sredne Kolyinsk, but not common until Verkhni is 

 reached. Saw them constantly there in April and May, near the Kolyma 

 and in the foothills of the Tomus Chaja Mountains before leaving the timber. 

 Winter resident south of Sredne Kolymsk. — C. A. 



Family GAVIIDAE. 



5. GAVIA ADAMSI (Gray). 



One female, Cape Bolshaja Baranov, July 19, 1915; and one with- 

 out data from the Kolyma Delta region. 



6. GAVIA STELLATA (Pontoppidan). 



One male, Kolyma delta, July 16, 1915. 



1 Messager Ornith., vol. 7, No. 4, 1916, p. 226. 

 2Proc. Biol. Soc. Wash., vol. 28, 1915, p. 162. 



