ACKNOWLEDGMENTS 
During the preparation of the following paper I have often called upon fel- 
low members of the Cooper Ornithological Club for aid, which, though some- 
times incurring trouble on their part, has at all times been most cheerfully and 
promptly rendered. For furnishing me with important unpublished notes in re- 
gard to the island birds, I am very greatly indebted to the following gentlemen : 
W. L. Dawson, D. R. Dickey, O. W. Howard, L. M. Huey, C. C. Lamb, J. Maill- 
iard, C. W. Richmond and G. Willett; and for supplying much needed informa- 
tion of various kinds, to C. B. Linton, H. C. Oberholser, A. van Rossem, and H. 
S. Swarth, the latter having been of great help to me in many ways. I am under 
obligation to F. S. Daggett for allowing me access to the collections in the Mu- 
seum of History, Science and Art, of Los Angeles; to J. EK. Thayer for the loan 
of specimens and for notes; to the Bureau of Biological Survey, through E. W. 
Nelson, for the loan of specimens; to the Museum of Vertebrate Zoology of the 
University of California for access to its collections, and for the loan of speci- 
mens; and to W. L. Chambers for the unrestricted use of his splendid library. 
Finally, to Dr. Joseph Grinnell I am under a lasting debt of gratitude for encour- 
agement, advice on all sorts of subjects, and the use of his unpublished notes. 
The accompanying map was drawn by C. L. Moody, and the technical descrip- 
tions of the islands were taken in part from the Pacifie Coast Pilots of the U. 8. 
Coast and Geodetic Survey. 
A. Brazier IIOwELL. 
Covina, California, 
January 10, 1917. 
