. Handbook of birds of eastern North America, with keys to the species and descriptions of their plumages, nests, and eggs .. . d toe normal, with a nail. 61. Tarsus 1*50 or over 58. Laughing Gull (Im.). ci. Tarsus under 1* Secondaries pearl color, tail square. 60. Bonapartes Gull (Im.).c3. Secondaries mostly white, tail rounded. 61. Eosss Gull (Im.). 39. Gavia alba; {Gunn.). Ivory Gull. Ad.—Entire plumage purewhite; bill yellow, feet black. /»i.—Similar to ad., but the wing and tail GULLS. 69 feathers, and sometimes the wing-coverts, with a black spot at their tips. L.,17-00; W., 13-25;

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. Handbook of birds of eastern North America, with keys to the species and descriptions of their plumages, nests, and eggs .. . d toe normal, with a nail. 61. Tarsus 1*50 or over 58. Laughing Gull (Im.). ci. Tarsus under 1* Secondaries pearl color, tail square. 60. Bonapartes Gull (Im.).c3. Secondaries mostly white, tail rounded. 61. Eosss Gull (Im.). 39. Gavia alba; {Gunn.). Ivory Gull. Ad.—Entire plumage purewhite; bill yellow, feet black. /»i.—Similar to ad., but the wing and tail GULLS. 69 feathers, and sometimes the wing-coverts, with a black spot at their tips. L.,17-00; W., 13-25; T., 5-50; B., 1-35. Range.— Arctic seas, south in winter on the Atlantic coast of NorthAmerica to Labrador and Newfoundland, casually to New Brunswick, and onthe Pacific side to Bering Sea (A. 0. U.). Long Island, A. V., one record. Nest.^ of grass, moss, and feathers on rocky cliffs. Eggs^ light yellowisholive, marked with small blotches of brown and larger cloudings of lilac,2-45 X 1-70 (Brewer). The Ivory Gulls appear to spend most of the time amid the pack-ice, often at a long distance from land (Chamberlain).. a

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1901