BACK NUMBERS OF THE OSPREY. 



A Few Complete Sets of Volume Two at $1.50 Each. 



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THE OSPREY COMPANY, 321-323 4^ Street N. W., Washirgtor?, D. I 



Fublicatmis of the American OrnUliologisis' I'nUm. 



THB AUK, 



A Quarterly Joarnal of Ornitboloy v. 



I. A, ALLEN, Editor, 



FRANK M. CHAPMAN, ASSOC, Editor. 



As the official oi-jran of the Union, "The Auk" is 

 the leading ornithological publication of this country. 

 Each number contains about ItlO pages of text, a 

 handsomelv colored plate, and other ilhistrations. 

 The principal articles are by recognized authorities, 

 and are of both a popular and scientitic nature. The 

 department of "General Notes" gives brief record 

 of new and interesting facts concerning birds con- 

 tributed by observers throughout the United States 

 and Canada. Recent ornithological literature is re- 

 viewed at length and news items are commented on 

 by the editors. "The Auk" is thus indispensable to 

 those who would be informed ot the advance m^dein 

 the stud V of birds, either in the museum or in the 

 field. Price of current volume, 13.00. Single num- 

 bers, 75 cts. 



Check-List of North American Birds. 



The text has been most carefully revised, recent 

 changes in nomenclature and specie^ and sub- 

 species described since 189H are included, while the 

 ranges of birds have been entirely re-written and 

 more fully defined. 8vo. Cloth. Price, $2.00. 



L. S. FOSTER, 



Agent for the Union of the Sale of its Pvblications. 

 S3 Pir)e Street, l^eW Yovh, eitv. 



BIRD=LORE FOR 1900 



Will contain numerous article by recognized 

 leaders in the woi-ld of science and letters, and 

 of a variety which cannot fail to create wide 

 interest. 



For the general reader there vrill be papers by- 

 John Burroughs, Bradford Torrey, Robert Ridg- 

 way, William Brewster, C. Hart Merriam, T. S. 

 Roberts, E. A. Mearns, and others, and Captain 

 Reynaud, in charge of the Homing Pigeon Ser- 

 vice of the French Armj', will present a new 

 theory of bird migration, based on his experi- 

 ments with homing" pigeons. 



Attention will be paid to the bird-life of the 

 countries made prominent by recent events, 

 Tappan Adney writing of the Ijirds of the Klon- 

 dike, H. W. Henshaw. of the birds of Hawaii, 

 L. M. McCormick. of Philippine birds, and F. M. 

 Chapman of Cuban birds, while A. J. Campbell, 

 the authority on Australian birds, will describe 

 the wonderful habits of the Bower Birds of Aus- 

 tralia, accompanying his paper by actual photo- 

 graphs of their bowers from nature. 



Students will be glad to avail themselves of 

 the assistance offeree! by Bird-Loke's 'Advisory 

 Council,' a new idea in self-educational orni- 

 thology, which places students in direct commu- 

 nication with an authority on the bird-life of 

 their reg'ion who has consented to aid them. 



The illustrations will be of the same high 

 character as those for which Bikd-Lork has 

 already become distinguished. 



Annuiil Subscription, $1.00; Single Number, 20 cts. 



THE MACMILLAN COMPANY, 



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