1910] The Ottawa Naturalist. 155 



In work of this kind, when one observer usually cannot give all 

 his time to it, co-operation on the part of many painstaking and 

 conscientious observers is especially desirable, as indeed in all 

 biological and other investigations. Therefore, this list embodies 

 not only the results of the writer's work, extending over a period 

 of six years, but also many notes and data furnished by Messrs. 

 G. R. and E. G. White, A. G. Kingston, H. U. Morris, and H. 

 Groh, who, together with the writer, frequently held meetings 

 as the ornithological section of the Club. Mr. W. T. Macoun of 

 the Central Experimental Farm and the late lamented Dr. J. 

 Fletcher also furnished a number of valuable items. Especially 

 valuable, however, has been the co-operation of Mrs. R. D. 

 Brown and Miss Lees of "The Pines," Ottawa East, whose charm- 

 ing home with its beautiful surroundings is a perfect ther- 

 mometer, so to say, for bird-life, be it for the migrant or resident 

 species, their coming and going, greatest frequency, etc. The 

 same can be said of Mr. E. Bedard, the keeper of the Rifle Range, 

 and of his station of observation; he has indeed been of much 

 assistance to me, and his many, often surprising records, were 

 usually borne out by the specimen mounted. To these and 

 several others who have occasionally furnished notes to the 

 writer, also to Prof. J. Macoun, of the Geological Survey, who 

 has always kindly allowed him free access to the collection of 

 skins in the museum, the writer would once more express his 

 sincere thanks. 



The order and arrangement of the list is that of the American 

 Ornithologists' Union, which is the standard. The scientific 

 names are also brought up to date, they being those of the third 

 check-list of the Union of 1910, with the exception that the 

 trinomials have been left as binomials for the species, and re- 

 tained for the subspecies only, for which they are really only 

 necessary. The numbers, however, are continuous, as any others 

 are of no use in a list of this kind. The meaning of the designa- 

 tions of frequency is as follows: rare, 1-5 individuals of that 

 species seen during a whole season; moderately coinmon, 1-2 

 in a day spent in their proper haunts; common, 5-10; abundant, 

 more than 10. The name of the order is given first, that of the 

 family second. 



Order Pygopodes -Diving Birds. 

 poDiciPiD^ grebes. 



1. Mchmophorus occidentalis. Western Grebe. Rare acci" 

 dental visitor. A specimen was caught alive on February 26th' 

 1904, in the grounds of the Ladies' College and kept alive several 

 days. 



2. Colymbus holbcvlli, Holboell's Grebe; Red-necked Grebe. 



