MAY, 1910 



VOL. XXIV, No. 2 



THE 



OTTAWA 

 NATURALIST 



ft 



Published by The Ottawa Field-Naturalists' Club. 



EOitot: 



ARTHUR GIBSON, 



Central Experimental Farm, 



OTTAWA. 



HsBOCiatc EOitorg: 

 W. T. Macoun, W. J- Wilson, Ph.B. Rev. G. Eifrig. 



Botany. Geology. Ornithology. 



Rev. G.W. Taylor, M.A. Alex. McNeill, L. M.Lambe, F.G.S , 



Conchology. Meteorology. Palceontology. 



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



Entomology. Nature Study. Zoology, 



CONTENTS: 



Canadian Species of Thalictrum. III. By Edward L. Greene. - 25 



House-Flies and the Public Health. By C. Gordon Hewitt. - 30 



Winter Birds at Point Pelee, Ont. By W. E. Saunders. - - 36 



Contributions from the Herbarium of the Geological Survey. By 



James M. Macoun. ____-. --37 



Notes on Winter Birds in Hochelaga and Compton Counties. By 



L. McI. Terrill. - - 38 



Meeting of the Entomological Branch. ------ 40 



Excursions -.__-- 41 



Notes : Short-eared Owl ; Phalaropes in Western Ontario ; Brun- 

 nich Murre; Yellow-flowered Variety of Large Coral-root; 

 The Black Rail in Ontario. 42 



Copbland-Chatterson-Crain Limited 

 ISSUED MAY 7, 1910. 

 UnUrad at th Ottaxoa Pott Offie* as tteond elas* mattm". 



