116 The Ottawa Naturalist [December 



EUROPEAN BUTTERFLY FOUND AT LONDON, ONT. 



During the past few years Mr. John A. Morden, of London, Ont, 

 has captured an unkown butterfly of a shaded orange colour, belonging 

 to the skipper family. On sending it to the authorities at Washington 

 it was determined as Adopea (Pamphila) lineola. 



This European insect does not seem to have been previously 

 reported from America. Mr. Morden first found it near the Dundas 

 Street Bridge where refuse had been dumped. Possibly the eggs of 

 the insect came from Europe with something that was thrown out and 

 when hatched the larvae found food in close proximity. 



Mr. Morden says that the butterfly is now moderately common 

 during July and is apparently spreading over the city. 



The first capture was made July 21, 1910, when 10 specimens 

 were taken, mostly worn. In 1911, most of the quack grass 

 (Agropyrum repens) around the dump where the insects were taken 

 had been killed and none were seen at that locality, but two were taken 

 at Paul street not far away, in a waste lot overrun with quack grass. 



Each year since then he has found them in a strictly wider area 

 and, in 1914, one was taken in Hyde Park, five miles away. 



To Mr. A. A. Wood, Coldstream, who has been working on the 

 matter in conjunction with Mr. John A. Morden, I am indebted for 

 these facts. 



W. E: Saunders, London, Ont. 



BOOK NOTICE. 



"Water Powers of Manitoba, Saskatchewan and Alberta," issued 

 by the Commission of Conservation, is a valuable contribution to the 

 literature respecting the natural resources of Western Canada. This 

 report, by Leo G. Denis and J. B. Challies, comprises the results of 

 special surveys by the Commission of Conservation and a compilation 

 of records from other reliable sources. 



While the Prairie Provinces, as a whole, are not lavishly endowed 

 with water-powers, the report demonstrates that the utility of their 

 rivers for power development can be vastly enhanced through proper 

 storage of flood waters. At present in the absence of conservation 

 dams, and of adequate natural regulation, the great volume of flow is 

 lost during high water seasons. Methods of development to ensure the 

 maximum utilization are now being carefully worked out on the 

 Winnipeg, Bow and other large rivers. The more northerly regions 



possess numerous sites of great potential value for pulp, electro- 

 chemical and other special industries. 





