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 Nortu 
AMERICAN Birps, 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 author is particularly indebted for kindly advice 
and much valuable help in various ways. 
