The plan is to publish eventually a revision of the birds of Louisiana which will incorporate all of the new information, but the projected scope of this work is such that many years may elapse before it is finished. The present paper is intended to record only the more pertinent additions, particularly records that may be significant in connection with the preparation of the fifth edition of the American Ornithologists' Union's "Check-list of North American Birds." There are numerous species for which Oberholser cited only a few records, but of which we now have many records and large series of specimens. If, in such instances, the treatment given in the fourth edition of the American Ornithologists' Union's Check-list would not be materially affected, I have omitted mention of the new material in this paper. I am indebted to a number of ornithologists who have presented their notes on Louisiana birds to the Museum of Zoölogy and who have done much to supplement its collections. Outstanding among these are Thomas R. Howell, Robert J. Newman, Sam M. Ray, Robert E. Tucker, Harold E. Wallace, and the late Austin W. Burdick. Their efforts in behalf of the Museum have been untiring. I am grateful also to Thomas D. Burleigh and Jas. Hy. Bruns, both of whom have played an integral part in our field activities in recent years and without whose help much less would have been accomplished. John S. Campbell, Ambrose Daigre, James Nelson Gowanloch, Sara Elizabeth Hewes, E. A. McIlhenny, Edouard Morgan, and George L. Tiebout, Jr., have generously contributed notes and specimens which are duly attributed in the following text. For assistance in taxonomic problems, or for the loan of comparative material, I wish to thank John W. Aldrich, Herbert Friedmann, Howard K. Gloyd, Alden H. Miller, Harry C. Oberholser, James L. Peters, Karl P. Schmidt, George M. Sutton, J. Van Tyne, and Alexander Wetmore. #Sula sula sula# (Linnaeus), Red-footed Booby