22 U. S. BUREAU OF FISHERIES. 



cumstance that the road follows the stream for many miles, and 

 there must have been thousands of anglers fishing there in 1919, 

 according to the senior author's notes of July, 1919. Grebe Lake, 

 Blacktail Deer Creek, Madison, Firehole, and Little Firehole Rivers 

 all contain rainbow trout. Referring to the last-named stream in 

 1897, the superintendent of the park wrote that several good speci- 

 mens had been taken near its source, for which he could not account, 

 as it seemed impossible for any fish to ascend the lower falls of the 

 Little Firehole. A. H. Dinsmore reports the fish from Tower Creek 

 above the falls. 



Many persons who have had experience in angling for rainbow 

 trout say it is one of the best, and some pronounce it the very best, 

 of the trouts. It often dashes from the water to meet the descending 

 fly and leaps repeatedly and madly when hooked. It has been said 

 that it takes the fly so readily that there is no reason for resorting to 

 other lures. However, its activity and habits, as in the case of most 

 fishes, are modified more or less by its surrounding conditions. The 

 same is true of its food qualities, which ordinarily are very good. 



FIG. 4. Rainbow trout. 



Mary Trowbridge Townsend (1. c.) had the following to say relative 

 to her experience with the rainbow trout in Firehole River: 



The California rainbow trout proved true to his reputation as absolutely eccentric 

 and uncertain, sometimes greedily taking a fly and again refusing to be tempted by 

 the most brilliant array of a carefully stocked book. During several days' fishing we 

 landed some small ones, none weighing over 2 pounds, although they are said to have 

 outstripped the other varieties in rapidity of growth, and tales were told of 4-pounders 

 landed by more favored anglers. 



5. SCOTCH LAKE TROUT; LOCH LEVEN TROUT (Salmo levenensis). 



This trout originated in Loch Leven, the lake made famous by 

 Scott's poem, "The Lady of the Lake." Typically it was peculiar to 

 this loch, where it seldom if ever attained much over 1 pound in 

 weight. The claim has been made that it is merely an ontogenetic 

 development of the common brown trout, and that when transferred 

 to other waters its progeny can not always be distinguished from the 

 common brown trout. On the other hand, information derived 

 from persons familiar with Loch Leven indicates that both this trout 

 and the brown trout exist in the same lake, and that in that body of 

 water they can always be distinguished. 



