Birds and Seasons 139 night migrating birds may be observed in large numbers with a low-power telescope; even a mariner's hand-glass will prove serviceable. The telescope should be focused on the moon, against which birds in passing are silhoueted. (See Scott, Bull. Nuttall Orn. Club, V, 1880, p. 151; Chapman, 'The Auk,' V, 1888, p. 37.1 Why do more birds strike lighthouses in the fall than in the spring? ( See Allen, Bull. Nuttall Orn. Club, V, 1880, 131. On the general subject of migration, see especially, Brewster Memoir No. r, of the Nuttall Orn. Club, of Cambridge, Mass.) SUGGESTIONS FOR THE SEASON'S READING Thoreau : 'A Week on the Concord and Merrimac Rivers.' Torrey : 'The Passing of the Birds' in 'The Foot-path Way.' Flagg: 'August and September' in 'A Year with the Birds.' Bolles: 'At the North of Bearcamp Water.' Wright: 'A Song of Summer' and 'Rustling Wings' in 'The Friendship of Nature.' Crockett: 'August' and 'September' in 'A Yearbook of Kentucky Woods and Fields.' Ingersoll . 'Nature's Diary.' Chapman: 'Where Swallows Roost' in 'Bird Studies with a Camera.' What Bird is This ? Field Dricripiion. — [.cnnh, 5.25 in. Upper parts olivc-Erecn. L'nder parts soiled yellowish white. Note. — Ea<h number fif Bird-I.ork will contain a photograph, from specimens in the American Museum of Natural History, of some widely-distributed, but, in the eastern United States, at least, little-known bird, the name of which will be withheld until the succeeding number of the magazine, it being believed tiiat this method of arousing the student's curiosity will result in impressing the bird's characters on his mind far more strongly than if its name were given with its picture. The species figured in June is the C'ape May Wariiler.
