FEBRUARY, 1912 



VOL. XXV, No. 11 



THE 



OTTAWA 

 N ATURA LIST 



Published by The Ottawa Field-Naturalists' Club. 



JSDitot: 



ARTHUR GIBSON, 

 Central Experimental Farm, 

 OTTAWA. 



Associate Bottore: 



W. T. Macoun, P. E. Raymond, Ph.D. 



Botany. Geology 



Prof. John Macoun, M. A. Otto Klotz, LL.D. 



Conchology Meteorology. 



W. H. Harrington, J W. Gibson, M.A. 



Entomology. Nature Study. 



Miss M. F. Fortier, 



Ornithology. 



L. M.Lambe, F.G.S., 



Palaeontology. 



Prof. E. E. Prince, 



Zoology, 



CONTENTS: 



The Myxomycetes or Slime-moulds of the Ottawa District ; a pre- 

 liminary list. By J. W. Eastham. 157 



The Identity of the better known Midge Galls. By E. P. Felt. - 164 



Drinking Water and Health. By Frank T. Shutt. - - - 168 



Lectures ----------- 172 



The Rolla L. Crain Co., Limited 



ISSUED FEB. 12, 1912. 



\ 



Entered cU th Ottawa Pout Office at ttoond claat matter. 



&M*l 



