Introduction 



has thought it best to include in his list. Two of these works require special mention, 

 because of the liberal use made of them. They are Dr. Elliott Coues' KEY TO NORTH 

 AMERICAN BIRDS, and A LIST OF THE BIRDS OF THE HUDSON HIGHLANDS, by Dr. Edgar A. 

 Mearns. The measurements of birds given in the latter of these works have, with slight 

 modifications, been adopted here. The figures are the average lengths of from half a 

 dozen to about half a hundred specimens, and may serve as a general indication of 

 size. Dr. Mearns' LIST is the source also from which most of the dates of migration 

 have been taken. 



It should also be said that the idea of a calendar of bird arrivals and departures is 

 not an original one. Dr. Allen published a somewhat similar list of New England birds 

 in the first volume of the AMERICAN NATURALIST, issued in 1867-8. 



Thanks for assistance are due to Mr. E. A. Fairchild, Principal of the Flushing 

 Institute, and to Mr. Clifford Smyth, of New York City. 



To Dr. J. A. Allen, Curator of the Ornithological Department of the Museum of 

 Natural History of New York City, the authoi is particularly indebted for kindly advice 

 and much valuable help in various ways. 



