ADVERTISEMENT. 



The accompanying sheets of a Revision of the Birds of North 

 and Middle America, by Prof. S. F. Baird, are disti'ibuted by the 

 Smithsonian Institution in advance of the completion of the whole 

 work, with the view of eliciting criticisms and suggestions from Orni- 

 thologists and Naturalists. Any remarks or corrections which may 

 tend to make the work more accurate and reliable, as well as speci- 

 mens of species not mentioned therein, or from localities other than 

 those indicated, will be thankfully received by the Institution. 



JOSEPH HENRY, 



Secretary S. I. 

 Smithsonian Institdtion, 

 Washington, 1864. 



PHILADELPHIA : 

 COLLINS, PEINTEB. 



