ORNITHOLOGICAL EXPLORATIONS. 15 



lates a similar mistake on the part of a flock of coots, Fulica atra L. (Of. 

 Journ. f. OiD., 1874, p. 343). 



This species is distinguished by the natives from the following as 

 " Bolschoj Gagara." 



The specimen measures as follows : 



9 jun. U. S. Nat. Mus., No. 92916; L. Stejneger, No. 175:^. Bering Island, Novem- 

 ber 25, 1882. 



Total length, 777™™; wing, 355°""; tail-feathers, 65™™; exposed culmen, 71™™ ; 

 commissure, 102™™ ; bill from tip to posterior border of nostrils, 62™™ ; height of ' ill 

 at fore border of nostrils, 22™™; tarsus, 90™™ ; outer toe, with claw, 121™™. Weight, 

 5^ pounds. 



Remarks. — Iris brown. Bill light bluish gray, towards base somewhat violet ; cul- 

 men and tomia blackish. Outer aspect of feet blackish brown ; inner aspect bluish 

 white, with dark brownish gray on the joints, on the two inner phalanges of the outer 

 toe, and on the webs along the outer and middle toes. 



The stomach did not contain anything but half a dozen stones of the size and shape 

 of beans. 



The specimen is a bird of the year, but can nevertheless, without 

 doubt, be referred to adamsii. In the adult winter-plumage this species 

 and imber are readily distinguishable by the bill, which in the latter is 

 shorter than the tarsus, while in the former it is longer. This cannot be 

 done so easy in the young of the year, however, as at that age the bill has 

 not yet reached its full and linal length. The feet, on tbe other hand, are 

 already of the same size as those of the adult, while the height of the 

 bill is also much greater than in the corresponding age of imber, so 

 that the young adamsii may be identified by the very large feet and the 

 high bill, features which are very pronounced in the specimen collected 

 by me. The average length of the tarsus in adult imber measures 

 about 78°"" ; the same dimension in my young bird is 90°"° ; in the 

 former the average length of the outer toe with claw is 111""", against 

 121""" in the Bering Island specimen. As to the young of imber the 

 height of the bill is about 16 to IS™"", against 22""° in my bird, which 

 in that respect even exceeds the old U. imber. 



4. Urinator lumme (Gunn.). 



1761. — Colymhus lumme GUNN., Act. Nidr. I, pi. ii, fig. 2. — Urinator I. Turner, Auk, 

 1885, p. 159. 



1764. — Colymbus stellatus Brunn., Orn. Bor., p. 39. 



1764. — Colymbus horealis Brunn., Orn. Bor., p. 39. 



1766. — Colymbus septenirionalis Lin., Syst. Nat., 12 ed., I, p. 220. — Middend., Sibir. 

 Reis. II, 2 (p. 329), (1^53).— Kittl., Denkw., II, p. 282, (1858).— SchrenCk, 

 Reis. Amurl., I, p. 496, (I860).— Radde, Reis. Sud. Ost-Sibir., II, (p. 382), 

 (1863).— SwiNH., P. Z. S., 1863, p. 2,22.— Id., ibid., 1871, p. 415.— /d., Ibis, 

 1863, p. 433.— /d., ibid., 1874, p. 163.— Whitely, Ibis, 1867, p. 208.— Dall 

 & Bannist., Tr. Chicag. Acad., I, 1869, p. 307.— Finsch, Abh. Brem. Ver., 

 Ill, 1872, p. 75.— Dall, Avif. Aleut. Isl. west UnaL, p. 10 (1874).— Taczan., 



