14 ORNITHOLOGICAL EXPLORATIONS. 



2. Col3rmbus auritus Lin. 



1768. — Colymbus auritus Lin., Syst. Nat., 10 ed., I, p. 135. — Podiceps a. Whitely, Ibis 

 1867, p. 209.— Dyte8 a. Nelson, Cruise Corwin, p. 114 (1883). 



1788. — Colynibus cornuiua Gmel., Syst. Nat., I, p. 591 {nee Pallas, 1826). — Podiceps c. 

 MiDDEND., Sibir. Reis., II, 2 (p. 238), (1853).— Schrenck, Reis. Amurl., I., 

 p. 492.— Radde, Reis. Siid. Ost-Sibir., II (p. 381).— Swinh., P. Z. S., 1863, 

 p. 322.— /<?., Hid., 1871, p. 415.— Dall & Bannist., Tr. Chicag. Acad., I, 

 1869, p. 308.— FiNSCH, Abh. Breui. Ver., Ill, 1872, p. 76.— Taczan., J. f. 

 Orn., 1873, p. 1108.— Id., ibid., 1874, p. 336.— M, iWd., 1876, p. 203.— Id., Oru. 

 Fauu. Vost. Sibir., p. 72 (1877).— /d , Bull. Soc. Zool. France, 1877, p. 49.— 

 Blakist. & Pryer, Ibis, 1878, p.211.— itd., Tr. As. Soc. Jap., VIII, 1880, p. 

 181.— lid., ibid., X, 1882, p.92.— Seeb., Ibis, 1879, p. 21.— Id., ibid., 1882, p. 

 369. — Hartlaub, J. f. Orn., 1883, p. 284. — Blakist., Amend. List B. Jap., 

 p. 8 (1884). 



The Horned Grebe is of rare occurrence on the islands, probably only 

 an accidental straggler and not a regular migrant. It certainly does 

 not breed there anywhere. The only evidence of its occurrence which 

 I possess is a skeleton which one of the natives had made several years 

 ago from a specimen obtained at Bering Island. 



This specimen, No. 17273 of the osteological collection of the United 

 States National Museum (L. Stejneger, Ko. 1952) measures as follows: 

 Bill along commissure, 29""" ; tarsus, 43""". 



Superfamily ALCOIDE^. 



Family [JEmATORID^. 



3. Urinator adamsii (Gray). 



1835. — Colymbus glacialis Ross, Narr. Voy. N. W. Pass., p. — (necLiN.). — Middend., 

 Sibir. Reis., II, 2, p. 238 {part). 



18S6.— Colymbus hiemalis Wibgm., Arch. Naturg., 1836, p. 200 {nee Brehm). 



1859.— Colymbus adamsii G. R. Gray, P. Z. S. 1859, p. 167.— Dall & Bannist., Tr. 

 Chicag. Acad., I, 1869, p. 308.— Finsch, Abh. Brem. Ver., Ill, 1872, p. 72.— 

 Swinh., Ibis, 1877, p. 146.— Seeb., Ibis, 1879, p. 22.— Blakist. & Pryer, Tr. 

 As. Soc. Jap., VIII, 1880, p. 181.— lid., ibid., X, 1882, p. 94.— Nelson, Cruise 

 Corwin, p. 114 (1883).— Taczan., Bull. Soc. Zool. France, 1883, p. 345.— 

 Blakist., Amend. List B. Jap., p. 33 (1884). 



1872. —Colymbus torquatus var. adamsii CouES, Key, p. 334. 



The White-billed Loon is a winter visitor to the Commander Islands 

 of rather rare occurrence, but at least one was observed by me, apart 

 from the one specimen I obtained for my collection. 



This was caught in a rather curious manner. It was found sitting on 

 the smooth ice of Lake Saranna (November 25, 1882), unable to run upon 

 or lift from the glib surface. It evidently had mistaken the transparent 

 and shining ice for open water. — Ritter v. Tschusi-Schmidhofen re- 



