THE OTTAWA FIELD -NATURALISTS' CLUB 



President: R. M. Anderson. 



1st Vice-President: Hoyes Lloyd. 



Secretary: 



Clyde L. Patch 



(Geological Survey) 



2nd Vice-President: G. A. Millar. 



Treasurer: ^ 



C. B. HUTCHINGS. 



(Entomological Branch 

 Dept. Agriculture). 



Additional Members of Council: W. T. Macoun; Miss M. E. Cowan; C. M. Stern- 

 berg; H. I. Smith; F. W. Waugh; P. A. Taverner; E. Sapir; E. M. Kindle; 

 W, J. Wintemberg; R. E. Delury; Arthur Gibson; Norman Griddle; M. 0. 

 Malte; C. H. Snell; Melville Dale; L. McI. Terrill; John DAvrosoN; 

 R. Owen Merriman; H. M. Speechly; Harrison F. Lewis. 



^ - Editor: 



Harrison F. Lewis. 



Dominion Parks Branch 



Dept. of the Interior, Ottawa. 



Associate Editors: 



E. Sapir Anthropology A. G. Huntsman. .... .Marine Biology 



M. 0. Malte Botany P. A. Taverner Ornithology 



F. R. Latchford Conchology E. M. Kindle Palaeontology 



M. Y. Willmms Geology R. M. Anderson Zoology 



Arthur Gibson Entomology 



^ CONTENTS. PAGE 



Biological Notes along 1400 miles of the Mackenzie River System. By M. Y. Williams 61 



Manitoba Grasshoppers, Part 2. By N. Criddle 66 



The American Hawk Owl. By F. Napier Smith 68 



The Disappearance and Recovery of the Bluebird. By P. A. Taverner 71 



Summer Birds of the Lac la Biche and Fort McMurray Region. By F. L. Farley 72 



Book Notice. By A. G . 75 



Review: 



The Auk for 1921. By P. A. T 76 



THE CANADIAN FIELD-NATURALIST, lately The Ottawa Naturalist, 

 established thirty-five years ago, "to publish the results of original research or investi- 

 gation in all departments of natural history," is issued monthly, excepting for the 

 months of June, July and August. 



Papers, notes and photographs should be addressed to the Editor. Manuscript 

 should be typewritten. 



Subscriptions cover the current year, except those taken out during last quarter, 

 when they will be applied on the following year, the remaming numbers of current year 

 being sent free. Payments should be made' to the Treasurer, Mr. C. B. Hutchings 

 Entomological Branch, Dept. of Agriculture, Ottawa. Price of this volume, $1.50; 

 single copies 20c each. 



