GREAT BLACK-BACKED GULL. EAT 
faini shade of the same, the quills and tail often imperfectly barred with the same ; bill 
greenish-yellow. Length, about 24 (rather less than more); wing, 16-17; bill, 12-2; 
tarsus, 2-24. 
Habitat, Northern and Arctic seas, circumpolar; south in winteron the Atlantic coast 
to Long Island. 
Rare winter visitor on Lake Hrie. Mr. Winslowstates that two or three 
specimens have been taken in Cleveland harbor. Mr. Nelson gives it as 
a regular and not uncommon winter visitor on Lake Michigan. 
Notr.—The Glaucous Gull (ZL, glaucus) may occur in winter on the Lake. Mr. Nelson 
states that three specimens have been taken and others seen on Lake Michigan, by Dr. 
Hoy. It is extremely similar to L. leucopterus, but larger, length, 30; wing, 1&3. 
LARUS MARINUS Linneeus. 
Great Wiackebacled Gull. 
Larus marinus, AUDUBON, Orn. Biog., ili, 1835, 98; B. Am., vii, 1844, 152, 181.—Kuirr- 
LAND, Ohio Geolog. Surv., 1838, 166, 185-W HEATON, Ohio Agric. Rep. for 1860, 370, 
379; Reprint, 1861, 12, 20; Food of Birds, etc., Ohio Agric, Rep. for 1874, 575; Re- 
print, 1875, 15.—LANGDON, Cat. Birds of Cin., 1877, 18; Revised List, Journ, Cin. 
Soc. Nat. Hist., i, 1879, 189; Reprint, 23. 
Larus marinus, LINNZUS, Syst. Nat., 1, 1766, 225. 
Feet flesh-colored; bill yellow with red spot. Mantle blackish slate-colored; first 
primary with the end white for 2-3 inches; second primary with » white sub-apical 
spot, and, like the remaining ones that are crossed with black, having the iip white 
(when no quite mature, the first, with small white tip and sub-apical spot, the second 
with white tip alone). In winter, head and neck streaked withdusky. Young :—Whit- 
ish, variously washed, mottled and patched with brown or dusky; quills and tail black, 
with or witheut white tips; bili black. Very large; length, 30 inches; wing, 1&4; bill 
above 24. 
Habitat, American and European coast of the Atlantic. South in winter to Long 
Island (to Florida, Aud.). Great Lakes and the Mississippi (Aud.). 
Like the preceding, a rare winter visitor on Lake Hrie. Audubon (1. c.) 
gays: 
‘Lake Erie supplies with food the L. marinus, L. argentatus, L. atricilla, and some 
others, as well as the Great, the Arctic, the Roseate, and Black Terns, and some others, 
all of which pass at times over te the Ohio, and from thence to the ocean.” 
Mr. Winslow gives it as an occasional visitor to the vicinity of Cleve- 
land in later years. Mr. Langdon (1877) notes its probable identifica- 
tion on the Ohio, at Cincinnati. Many years since I saw a very large 
Gull flying high overhead, in this vicinity, which must have been this 
bird or L. glaucus. 
