THE CANADIAN FIELD-NATURALIST 



PUBUSHED BY ThE OtTAWA FiELD-NaTURAUSTS' ClUB 



Ottawa, Ont. 



Editor : 



Arthur Gibson, 



Entomological Branch, Department of 



Agriculture, Ottawa. 



E. Sapir 



M. O. Malte 



M. Y. WiLUAMS 



Associate Editors: 

 Anthropology P. A. Taverner 



Botany E. M. Kindle 



Geology R. M. Anderson 



Secretary : 

 Clyde L. Patch, 

 Geological Survey. 



Ornithology 



Palaeontology 



Zoology 



Treasurer : 

 F. W. Waugh, 



Geological Survey. 



CONTENTS 



Page 



Introductory I 



Notes on the Caspian Tern and the Parasitic Jaeger in Manitoba. By C. H. O'Donoghue 



and J. N. Gowanlock 1 



Douglas Fir Sugar. By J. Davidson 6 



Museums as Educational Institutions. By M. Y. Williams 10 



The Birds of ShocJ Lake, Man. By P. A. Taverner 12 



Brief Report of the O.F.N.-C. for Year Ending March 18, 1919 20 



Notes and Observations: 



American Soc. of Mammalogists 21 



Remarks Concerning Sand Launces. A. Halkett 21 



Mountain Blue Bird and its Irregular Appearance. F. L. Farley 21 



On the Early History of the American Lobster. A. Halkett 22 



Book Notices and Reviews: 



Washburn's Injurious Insects and Useful Birds 22 



Reese's Outlines of Economic Zoology 22 



THE CANADIAN FIELD-NATURALIST,, lately The Ottawa Naturaust, estab- 

 lished thirty-two years ago, "to publish the results of original research or investigation 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. 



Subscriptions should be sent to the Treasurer, Mr. F. W. Waugh, Geologicd Survey, 

 Victoria Memorial Museum, Ottawa. The price of this volume is $1.00. 



