Vol. VIII. 



l Oberholser, Genera and Species of Cygnince. 



Olor bewicki bewicki (Yarrell).* 

 Cygnus bewicki, Yarrell, Trans. Linn. Soc. Lond., xvi., 1830, p. 



453- 



Cygmis berwicki {err. typ.), Eyton, Monogr. Anat., 1838, pi. 18. 



Cygnus melanorhinus, Naumann, Vog. Deutschl., xi., 1842, p. 497, 

 t. 297 (Mockern, near Leipzig, Germany). 



Cygnus altiimi, Bonaparte, Compt. Rend., xliii., 1856, p. 648 

 (Baedecker, MS.), {nomen nudum, in synonymy of Olor minor). 



Chars, sp. — Lores and basal portion of bill yellow in adult, but 

 this colour not extending forward to the nostrils ; entire plumage 

 white ; wing, 477-535 ; exposed culmen, 92-95 ; width of bill, 

 28-31 ; height of bill at base, 39-43 mm. 



Type Locality. — Yarmouth, England. 



Geographical Distribution. — Northern Russia, northern Siberia 

 east to the Lena River, Nova Zembla, and probably Spitzbergen, 

 migrating to southern Siberia, Turkestan, the Caspian Sea, southern 

 Russia, Dalmatia, Italy, southern France, Great Britain, and 

 casually to Nepal. 



It may be well to state that the above Nepal record has not been 

 verified by examination of the specimen, so that it may prove to 

 belong under Olor bewicki minor. 



Olor bewicki minor (Keyserling and Blasius). 



Cygnus minor, Keyserhng and Blasius, Wirbelth. Europ., 1840, 

 pp. Ixxxii., 222 (Selenga River, Transbaikaha, Siberia). 



Cygnus bewicki jankowskii, Alpheraky, Priroda i Okhota, Sept., 

 1904, p. 10 (Ussuri-land, south-eastern Siberia). 



Chars, sub-sp. — Similar to Olor bewicki bewicki, but larger, the biii 

 especially higher and broader. Wing, 490-550 ; exposed culmen, 

 90-101 ; width of bill, 30.75-36 ; height of bill at base, 37-48 mm. 



Type Locality. — Selenga River, Transbaikalia, Siberia. 



Geographical Distribution. —Eastern Siberia, west to the Lena 

 River; in migration west to the Monjero River (a tributary of the 

 Khatanga River), south to Sungaria, Mongolia, China, and Japan. 



This form is, as recently shown by Mr. Butur]in,t easily distinguish- 

 able from true Olor bei&icki by greater length, height, and 



* The bird described by Swinhoe under the name Cygnus {Coscoroba) davidi (Proc. 

 Zool, Soc. Lond., 1870, p. 430) has sometimes been synonymized with Olor bewicki, 

 sometimes treated as a distinct species of Swan ; but by the best authorities it is now 

 considered to be a Goose of some kind. It was described from a single and still 

 unique specimen obtained by Pere David in the market of Tientsin, Northern China, 

 and now mounted in the Lazarist Museum in Paitang, at Peking. The original 

 diagnosis is as follows : — 



" It is smaller than Cygmis bewicki (Yarr.), with the neck about a third shorter, is 

 entirely white, with the bill vermilion colour, having a black dertrum, and the legs 

 and feet orange-yellow. Specimens of C. miisicus and C. hezvicki were ranged 

 alongside. Its nearest ally, of course, is C. coscoroba of Chili ; but it is larger than 

 that, and has the wing white throughout. It would appear to be the northern repre- 

 sentative of that curious form of Swan." 



\ Ibis, 1907, pp. 650-652. 



