24 BULLETIN 292, U. S. DEPARTMENT OF AGRICULTURE. 
by the arrival of migrants as early as March 20, 1887 (Hagerup). 
Toward the northern limit of the range, the date of arrival is nmeh 
later: Polaris House, May 10, 1873 (Davis) ; Eennselaer Bay, May 22, 
1854 (Kane) ; Fort Conger, May 14, 1882, and June 5, 1883 (Greeley) ; 
Whitsunflord, King Oscar Land, May 27, 1901 (Sverdrup); Bay of 
Mercy, May 31, 1852 (Armstrong); Winter Harbor, June 3, 1820 
(Parry); near Wellington Channel, latitude 76°, May 16, 1851 
(Sutherland); Yukon Delta, Alaska, May 13, 1879 (Nelson); Kowak 
River, Alaska, May 11, 1899 (Grinnell); and Point Barrow, Alaska, 
May 11, 1882 (Murdoch). 
Some late spring dates south of the breeding range are: Rockaway, 
Long Island, May 1, 1904 (Peavey) ; Boston, Mass, April 23, 1906 
(Remick) ; Peaks Island, near Portland, Me., April 27, 1883 (Knight) ; 
Godbout, Quebec, April 29, 1882 (Comeau); and Monterey, CaL, May 
4, 1897 (Loomis) ; while several were seen at Unimak Pass, Aleutian 
Islands, June 4, 1911, and at Unalaska Harbor five days later (Wet- 
more), but there were no indications of breeding. 
At Kingwah Fiord, Baffin Land, the first signs of nest building 
were noted May 24, 1878, and the first eggs were found June 8 (Kum- 
lien). Eggs were taken at Ivigtut, Greenland, from May 10 to 
June 14 (Hagerup); Beechey Island, June 21, 1853 (McCormick); 
Cape Sabine, June 17, 1900 (Thayer); Yukon Delta, June 4, 1879 
(Xelson); Kowak River, Alaska, May 26, 1899 (Grinnell); incubated 
eggs, in the Kolyma Delta, Siberia, June 26, 1912 (Thayer and Bangs) ; 
eggs ready to hatch, in King Oscar Land, June 24, 1901 (Sverdrup); 
young in the nest, at Cape York, July 2, 1858 (M' Clint o ck) ; and 
young just hatched, on Hall Island, Alaska, July 14, 1899 (specimen 
in U. S. National Museum) . 
Fall migration. — Birds on Aniak Island, Aleutians, July 18, 1911 
(Thayer), may have been either nonbreeders that had remained 
through the summer or the van of the fall migrants. At Anticosti 
Island, only a short distance south of the breeding range, the first 
migrants usually appear in August (Schmitt). The southern part of 
the winter range is not reached until much later: Fresh Pond, Mass., 
November 29, 1899 (Brewster); Orient, Long Island, November 30, 
1909 (Latham); Boston, Mass., December 15, 1909 (Wright); Far 
Rockaway, Long Island, January 1, 1891 (Howell); Comox, British 
Columbia, December 15, 1903 (Brooks); and Monterey, CaL, Novem- 
ber 6, 1893 (Breninger), and December 11, 1894 (Loomis). 
Long before this the ice has driven the glaucous gull from most of 
its northern nesting grounds; the last were seen at Cape Union, 
Ellesmere Island, September 1, 1875 (Feilden) ; Thank God Harbor, 
September3, 1871 (Hall); Winter Harbor, September 6, 1819 (Parry); 
Wellington Channel, September 5, 1852 (McCorniick) ; Stordalen, 
