VOL. XXV, No. 2 



XH EI 



OTTAWA 

 NATURALIST 



Published by The Ottawa Field-Naturalists' Club. 



BDitOC: 



ARTHUR GIBSON, 



Cbntkal Experimental Farm. 



OTTAWA. 



Associate EDltors: 



W. T. Macoun, P. E. Raymond, Ph.D. Miss M. F. Fortier, 



Botany. Geology. Ornithology. 



Prof. John Macoun, M.A. Otto Klotz, LL.D. L. M.Lambe, F.G.S., 



Conchology. Meteorology. Palaontology. 



W. H. Harrington, J. W. Gibson, M.A. Prof. E. E. Prince, 



Entomology. Nature Study. Zoology. 



CONTENTS: 



Oh Arctotherium from the Pleistocene of Yukon. By Lawrence 



M. Lambe. --------- 21 



The Spring Migration of Birds at Fishermans Island, Toronto. By 



J. A. Munro. -- 27 



Meetings of Botanical Branch -------32 



Book Notice 37 



Portrait of the late Dr. James Fletcher - - - - - 39 

 Nesting of the Mourning Warbler, Laval County, Que. 39 



Obituary 40 



The Rolla L. Crain Co., Limited /^^S^oal>w 



ISSUED MAY 19.1911. (*b/*P ^\% 



foiUrvi at the Ottaxoa Pott Office an meond elam matter. \ ^*J I II O A V f 



