

U. S. NORTH ERi^ BOUNDARY C0xMMI8SI0N; 



ARCHIBALD CAMPBELL, Esy., Commissioner. 



Maj. W. J. TWINING, U. 8. ExaRS., Chief Astronomer. 



NATURAL HISTORY. 



No. 1. 



OxN THE MUKID^. 



BY 



Dr. ELLIOTT COUES, U. S. Army, 



SUUGEON AND NATURALIST OP THE CO >1 Jl ISSION. 



REISSUED, WITH ADDITIONS, 



FROM THE 

 PROCEEDINOS OF THE ACADEMY OF NATURAL Sl'IEXCES OF PHILADELPHIA, 1874. 



PHILADELPHIA. 

 COLLINS, PRINTER. 



1874. 



