TROUT FLY-FISHING IN AMERICA 



difference being that in this form, as in spilurus, stomias, and 

 macdonaldi, the black spots are usually much more numerous on 

 the posterior part of the body, while the head is usually free from 

 spots. This is, however, not universally true. 



"In variety pleuriticus there is almost always a very distinct 

 red lateral band, and the lower fins are more or less red." 



The Rio Grande Trout 

 Salmo-clarkii-spilurus (Cope) 



This trout is a native of the Rio Grande River and 

 the mountain streams of the Great Basin of Utah, and is 

 found "as far south as the northern part of Chihuahua/' 

 While this trout has a number of black spots they are 

 largely confined to the region of the tail. 



"This form is apparently wholly identical with variety pleu- 

 riticus, except that in specimens examined the scales are less 

 crowded forward, so that the number in a lengthwise series is less. 

 I count 155 to 160 in Rio Grande specimens; 185 to 190 in those 

 from Colorado. From the trout of the Great Basin {virginalis) ^ 

 spilurus differs chiefly in the arrangement of its spots." 



The Great Basin of Utah Trout or 



The Utah Lake Trout 

 Salmo-clarkii-virginalis (Girard) 



This trout derives its name from the fact that it is a 

 native of Utah Lake, Utah County, Utah, and the streams 

 and v^aters of the Great Basin of Utah. 



"The trout of the Great Basin are profusely and not very 

 coarsely spotted, the spots being numerous anteriorly as well as 

 posteriorly, confined to the back rather than the tail." 



"In several examined, the scales are a little larger than in any 

 of the other forms, 140 to 150 in a lengthwise series, the scales on 



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