PREEA CE. 
Although only a year has passed since the publication of Part 
II of this Catalogue, Part III will be found to include notes from 
several new observers. These notes and the fact that our know- 
ledge of the smaller birds, and especially of their breeding habits, 
is much more complete than was the case with those covered by 
the previous parts account for the larger size of the present number. 
Mr. William Spreadborough, who has worked as my field assistant 
for so many years, collected in the spring of 1903 in the vicinity of 
Lake Okanagan in southern British Columbia; during the 
remainder of the season he was with Mr. James M. Macoun in the 
Peace River region in Lat. 56°. During part of April and nearly 
the whole of May, 1904, Mr. Spreadborough collected in the 
vicinity of Fernie and Elko, B.C., and I have been enabled to 
include a few of his notes in the latter part of the Catalogue. At 
the time of writing Mr. Spreadborough is en route for Hudson 
Bay where he will spend the summer, chiefly in the study of the 
breeding habits of the waders. Lists of birds and notes on their 
relative abundance have been furnished me by Mr. Alfred L. 
Garneau, Ottawa, Ont., Mr. A. B. Klugh, Guelph, Ont., Mr. A. 
F. Young, Penetanguishene, Ont., Mr. Norman Criddle, Aweme, 
Man. and Mr. E. F. G. White formerly residing in British Col- 
umbia, but now at Ottawa. 
Many doubtful or immature birds have been submitted to Mr. 
H. C. Oberholser, Assistant Curator, Smithsonian Institution, 
Washington, D.C.,and I have accepted his determinations in every 
instance. Mr. Oberholser also examined all the sparrows and 
warblers which have been found to vary as we cross the continent. 
Much additional information regarding the birds included in the 
first two parts has come to my hands and this will, in the near 
future, be published in the form of an addendum to the complete 
Catalogue. 
In bringing to a close a work, which though arduous has given 
me not less pleasure than the compilation of my larger Catalogue 
of Canadian Plants, I wish again to thank my many correspond- 
ants for the information and assistance they have so freely given 
