VIII BULLETIN 16 7, UNITED STATES NATIONAL MUSEUM 



ture (1912), and the terms used to describe the shapes of eggs are 

 taken from his Nomenclature of Colors (1886). The boldface type 

 in the measurements of eggs indicates the four extremes of the 

 measurements. 



Many of those who contributed material for previous bulletins have 

 continued to cooperate. Receipt of material from over 365 contrib- 

 utors has been acknowledged previously. In addition to these, our 

 thanks are due to the following new contributors: Klauss Abegg, 

 K. G. Bee, Henry Beston, J. C. Braly, J. F. Brenckle, J. V. Coevering, 

 A. A. Cross, C. T. Dalgety, F. R. Decker, H. C. Denslow, J. B. Dixon, 

 W. S. Duncan, C. L. Field, F. H. Fowler, A. F. Ganier, H. K. Gloyd, 

 W. A. Goelitz, W. C. Hanna, H. L. Harllee, Eric Hearle, H. G. 

 Heggeness, John Helton, Jr., F. H. Holmes, J. C. Howell, R. H, 

 Imler, L. B. Kalter, Curtis Kingsbury, W. S. Long, E. D. Lumley, 

 V. L. Marsh, J. H. McNeile, Lotta T. Melcher, D. V. Messer, James 

 Moffitt, J. A. Moore, T. E. Musselman, Margaret M. Nice, W. H. 

 Nicholson, W. P. Owen, Theed Pearse, Mrs. H. R. Peasley, J. S. 

 Rowley, C. D. Scott, A. R. Sharp, Jr., L. O. Shelley, C. F. Smith, 

 F. R. Smith, G. D. Sprot, Lawrence Stevens, Paul Thompson, R. W. 

 Tufts, C. E. Underdown, H. S. Vaughn, L. H. Walkinshaw, and 

 R. S. Woods. 



Through the courtesy of the Bureau of Biological Survey, the 

 services of Frederick C. Lincoln were again obtained to compile the 

 distribution paragraphs. With the matchless reference files of the 

 Biological Survey at his disposal, his many hours of careful work 

 have produced results far more satisfactory than could have been 

 attained by the author, who claims no credit and assumes no respon- 

 sibility for this part of the work. 



Dr. Charles W. Townsond and Dr. Winsor M. Tyler rendered 

 valuable assistance in reading and indexing, for this group, the 

 greater part of the periodicals relating to North American birds, 

 which saved the author many hours of tedious work and for which 

 his thanks are due. Dr. Townsend also contributed the entire life 

 liistories of two species, Dr. Tyler one, and the Rev. F. C. R. 

 Jourdain one. 



Thanks are due to the late Owen Durfee for many hours of careful 

 work in collecting and arranging a great mass of data on egg dates, 

 and to F. Seymour Hersey for figuring egg measurements. 



The manuscript for this volume was completed in May 1936. Con- 

 tributions received since then will be acknowledged later. Only 

 information of great importance could be added. The reader is 

 reminded again that this is a cooperative work; if he fails to find 

 in these volumes anj^thing that he knows about the birds, he can 

 blame himself for not having sent the information to 



The Axtthor. 



