ne Ohio Naturalist, 



PUBLISHED BY 



The Biological Club of the Ohio Slate Uni'versity, 



Volume VII. MAY, 1907. No. 7. 



TABLE OF CONTENTS. 



WiLLi.\MSOX— A Collecting Trip North of Sault Ste. Marie, Ontario. . ]29 



W1LLIAM.S0N— Li.'t of Dragonflies of Canada 1^18 



Atkinson — Notes on a Collection of Batrachians and Reptiles from Central America.. 151 



Griggs— Waterg! ass for Marking Slides 157 



Fr.\nk— Meeting of the Biological Club 158 



A COLLECTING TRIP NORTH OF SAULT STE. MARIE, 



ONTARIO, 



E. B. Williamson. 



This little trip of two weeks' duration was made especially in 

 search of dragonflies along the line of the Algoma Central Rail- 

 road north of Sault Ste. Marie, Ontario. Every effort was made 

 to collect the greatest possible number of specmiens and species 

 in this group, and the other records of animals and of plants 

 which follow are based upon the most desultory collecting. 

 Those who have studied these miscellaneous collections have 

 furnished me with notes which are published in this paper over 

 the authors' names. 



The Algoma Central Railroad is one of the Clurg enterprises. 

 Aimed across a wilderness at the distant Hudson Bay, it was to 

 be the highway over which the golden fleece should be brought 

 to the Soo. The power of the rapids of the St. Marys River, the 

 mines and forests of the Algoma District, a railroad route to 

 Hudson Bay, homes for settlers, these w^ere the things which the 

 creative imagination of a man saw as material for the building of 

 a great and flourishing empire from which he and his associates 

 should receive wealth hitherto undreamed of. But the workmen 

 came down from the mountains for their long due pav and troops 

 protected the officers of the several companies. The Algoma 

 Central has been built for only 70 miles. These 70 miles are, 

 however, well constructed and a trestle at Bellevue is said to be 

 the highest and longest wooden structure of this kind in the 

 w^orld. 



At once after leaving the Soo the road passes into mountains 

 which are uninterrupted from that point to the inland terminus. 

 Cuts through solid rock reveal beautiful folds of the pink and 

 dark green layers of gneiss or the more uniform black, gray or 



