CONTENTS. 



PAGE. 



Officers and Council elected January, 1885 vii 



Standing Committees, 1885 . . . .... . viii 



Officers and Council elected January, 1886 ......... ix 



Standing Committees, 1886 . ,. . . ..... ... . . . . x 



List of Members, January 23, 1886 ...... ^ ....... xi 



Constitution . ' . . . . . . . ' . . xxv 



Proceedings, November i, 1884, to February 6, 1886 . . '. -. . xxix 



Addresses and Communications I 



The Application of Biology to Geological History; Annual Address 



of the President, Charles A. White, January 24, 1885 .... I 

 Description of some new species of birds from Cozumel Island, 



Yucatan, Robert Ridgway (February 26, 1885*) .'".-. . . 21 

 Description of a new species of Chipmunk from California (Tamias 



macrorhabdotcs, sp. nov.), C. Hart Merriam (January 27, 



1886*) 25 



On a new method of producing immunity from Contagious Diseases, 



D. K. Salmon and Theobald Smith (February 22, 1886*) ... 29 

 The Beginnings of Natural History in America; Annual Address of 



the President, G. Brown Goode, February 6, 1886 35 



Additions to the flora of Washington and Vicinity, from April i, 



1884, to April i, 1886, F. H.Knowlton. 106 



* Author's extras of each of the special papers here enumerated were published at the date 

 given in parentheses following the author's name. 



