49 
laborious task of editing the manuscript of this report and seeing it 
through the press. Mr. Ridgway, both as representing the Smithsonian 
Institution, and personally, has aided in settling disputed points of iden- 
tification and distribution; and Mr. Allen and Dr. Coues have assisted 
in the same manner. Norshould the able effortsof Prof. D. BE. Lantz, of 
Manhattan, Kans., be forgotten. Not only did he furnish, for two years, 
a very full and acceptable set of notes on migration, but when the sick- 
ness of the author threatened to prevent the completion of this report, 
Professor Lantz came to his assistance, and, although already burdened 
by his own private work, found time to write nearly one-eighth of the 
systematic portion of this report. Last, but not least, should the au-: 
thor endeavor to acknowledge his indebtedness to Mr. Otto Widmann, 
of Saint Louis, Mo. When the work was begun and its future seemed 
clouded in doubt, his voluminous and valuable notes turned the scale; 
later, when delays and discouragements came, his advice and encour- 
agement awoke renewed vigor and interest. Not only does the material 
contributed by Mr. Widmann form the most valuable part of the present 
report, but during its preparation his aid has been so constant that it 
is perhaps not too much to say that his name should be included as 
joint author. 
Thanks are due, also, to the U. 8. Signal Service for kindly furnishing 
weather reports and maps. 
7365—Bull. 2——4 
