THE OOLOGIST. 



19 



^yi MOJWX/MBJSfTAL te^O'RK. 



FIFTH REVISED EDITION OF THE 



Key to North American Birds. 



By ELLIOTT COUES, M. D., Ph. D. 



Wholly new text. Profusely illustrated. Over two hundred new- 

 figures of rare species, added in this edition, from life studies by 

 Louis Agassiz Fuertes. Bird Lore says (jf Coues' Key: "It is be- 

 yond comparison the best book on general and systematic ornithol- 

 ogy ever published." The manuscript of this fifth revised edition 

 was completely finished shortly before the death of Dr. Coues, and, 

 though a posthumous work, is one which the author would unques- 

 tionably have been proud to own as the crowning achievement of his 

 life. The proofs have been read l>y an experienced ornithologist. 



Indispensable to every Student or Sportsman. 



f-3t 



TWO VOLUMES. CLOTH, NET $10. 



DANA ESTES & CO., Boston. 



THE MACMILLAN COMPANY ANNOUNCE 



That until the supply is exhausted they will give a free copy 

 of BIRD LORE for December, 1903, to all subscribers to 

 Volume VI, 1904, of that publication. This issue contains the 

 first two plates in the series designed to figure in color all 

 the plumages of every species of North American Warbler? 

 and should be secured by everyone interested in the study of 

 these birds. 



Gold Fish, 



Aquariums, Globes, Aquaria 



Castles, Water Plants, Etc. 



Pleasing and instructive to the young, pastime to the old and invalid. No 

 trouble to keep. They can outlive us. Free catalogue. 



THE PIONEER AQUARIUS MFG. CO., 



»i LAKEPORT, RACINE, WIS. 



