294 The Field Naturalist's Quarterly Nov. 



III. hake Fish. — The gigantic trout lately reported from 

 such New Zealand lakes as those of Hayes and Wakatipu 

 can compare in stature only with the trout of Lucerne and 

 the salmon of Wener. The world's lakes produce indeed 

 salmonidai that seem to excel those of the greatest rivers. 

 In the case of New Zealand we must probably look to super- 

 abundance of natural food for a not indigenous fish as the 

 chief, if not the only, cause of such phenomenal increase as 

 a recorded growth of 15 lb. in five years. Some of the 

 American and Canadian lakes have a characteristic fish in 

 the pickerel, a kind of pike, and the pike of one or two Irish 

 lakes, or loughs, have at all times taxed the credulity of every 

 class but anglers. Our own Loch Leven is famous for its 

 trout, over 20,000 lb. weight of which have been taken on 

 the hook in a single year. Touching these trout. Sir John 

 Murray has brought a curious fact into more general notice 

 — viz., that they took to the artificial fly only since the year 

 1856. To what influence, physical or psychological, we are 

 to attribute this comparatively recent change of habit, it 

 would be interesting to learn. Our East Anglian Broads 

 are hardly perhaps lakes in the school-geography definition 

 of the term, but for zoological purposes they may be so 

 regarded, and this warrants me in including among the 

 notable lake fish of the world the pike of Barton and 

 Oulton and the bream of Wroxham and Fritton. They 

 are unrivalled. 



An Extinct Butterfly {Chrysophanus dispar, 



Haw). 



The Large Copper. 



By J. R. Charnley, F.E.S. 



" The animals," writes Mr W. B. Tegetmeier in the ' Field ' 

 (1893), " that have been exterminated by the agency of man 

 are not confined to any one group. We know that he has 

 destroyed many of the larger and more interesting verte- 



