608 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
[Larus] schistisagus SHarrz, Hand-list, i, 1899, 141—Forpes and Rosrinson, 
Bull. Liverp. Mus., ii, no. 2, 1899, 58. 
- Larus marinus schistisdgus SezBoum, Birds Japan. Emp., 1890, 291. 
LARUS AFFINIS Reinhardt. 
SIBERIAN GULL. 
Similar to L. schistisagus, but much smaller (about the size of 
L. occidentalis), bill much more slender, color of back, etc., slightly 
lighter, third primary (from outside) without any white space on 
inner web between the black and gray areas, and iris, orbital ring, 
and feet very different in color. 
Adults in summer (sexes alike).—Head, neck, rump, upper tail- 
coverts, tail and entire under parts, including axillars and under 
wing-coverts, immaculate pure white; back, scapulars and wings 
warm neutral gray to nearly mouse gray, the tertials, secondaries, 
and proximal primaries tipped with white, the distal primaries 
abruptly tipped with white and marked subterminally with black; 
second primary (from outside) with a distinct gray “wedge” on 
inner web; bill yellow, the mandible with a subterminal lateral 
spot of red, the maxilla sometimes tinged with red in front of nos- 
tril; iris yellow; bare orbital ring orange-red or oe in life; 
logs and feet yellow (in life). 
Adults in winter.—Similar to summer adults, — head and neck, 
all round, heavily spotted, or broadly streaked with dusky, yellow 
of bill paler or more greenish, and yellow of feet paler. 
Young.—(No specimens available. Said to be like that of L. 
fuscus, but with general color of back and wings lighter). 
Adult female.-—Wing, 423-424 (427); tail, 157-165 (160); ex- 
posed culmen, 51.5-52.5 (52); tarsus, 61-68.5 (64); middle toe, 
49-54 (52).° 
Breeding in northern Russia and Siberia, from Dwina River to 
Yenesei River and Taimyr Peninsula (doubtfully in valley of Lena 
River); migrating southward as far as Mekran coast, western side 
of India, Gulf of Aden, island of Socotra, and coast of Somaliland, 
eastern Africa; accidental in southwestern Greenland (Nenortalik, 
Julianehaab) and southwestern France (Hendaye). 
[?] Larus littoreus (not of Forster, Descr. Anim., 1844¢) Forster, Indian Zool., 
1781, 42. 
Larus, sp. n.? JERpDoN, Madras Journ., xii, 1840, 225 (Deccan, India). 
Larus fuscus (not of Linneus) Hurron, Journ. Asiat. Soc. Beng. .) XV, 1847, 792 
(Cabul, Afghanistan).—Buytu, Cat. Birds Mus. Asiat. Soc., 1849, 288, part 
(see Hume, Stray Feath., iv, 502).—Jerpon, Birds India, iii, 1864, 830 
(Jaulna, Deccan).—Fitirri, Viagg. Pers., 1865, 352 (Caspian Sea).—BuytTH, 
Ibis, 1897, 176, 314.—Buanrorp, East. Pers., ii, 1876, 290 (Beluchistan). 
i r on. a 
= No adult males examined. ¢ Larus dominicanus Lichtenstein. 
> Three specimens. 
