THE OOLOGIST. 



71 



COUES' KEY TO 



NORTH AMERICAN BIRDS 



Contains a concise account of every species of living and fossil Bird at present 

 known on the Continent north of the boundary line between Mexico and the United 

 States, including Greenland. 



The Fourth Edition, exhibiting the New Nomenclature of the American Ornitholo- 

 gists' Union, and including descriptions of additional species, changes, 

 etc., up to May i, 1800. 

 WITH "WHICH .A-HE INCORPORATED 



GENERAL ORNITHOLOGY.— An outline of the structure and classification of 



of Birds; and 

 FIELD ORNITHOLOGY. — A manual of collecting, preparing and preserving 



Birds. 



By ELLIOTT COUES, M. A., M. D., Ph. D., Member of the National 

 Academy of Science, &c. 



PROFUSELY ILLUSTRATED. 



TTe three former editions of this Standard Text Bcok of Ornltholopy being entirely out of print, 

 flnd still very much in demand, ihe publishers have spared neither pains nor expense in the prepar- 

 ation of "THE NEW KEY," in which the whole subject is carefully brought down to date. "Cones' 

 Key" is too well known as a leading and authoritive treatise to require remark. The work contains 

 over 900 pages and is fully indexed with several ihousand entries. 



ROYAL OCTAVO, VELLUM $7.C0. SAMPLE PAGES FOR STAMP. 



FRANK H. LATTIN, 



ALBION, N. Y. 



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