PLATE 10 



Fig. 1. Meadow at the head of Leonard Creek (8200 feet altitude), 

 and a spur of Duffer Peak (9200 feet), Pine Forest Mountains, Humboldt 

 County, Nevada; July 18, 190&. Artemisia tridentata appears in the fore- 

 ground. The trees on the slopes of Duffer Peak are Finns flexilis. 

 Oreosco'ptes montanus, Spisella breweri, Centrocercus urophasianus and 

 Sturnella neglecta were noted in the sagebrush at this altitude. SiaUa 

 currucoides and Colaptes cafer coUaris were observed in the limber pines on 

 the slopes of Duffer Peak. Mammals most in evidence in the general 

 neighborhood were Citellus oregonus and Eutamias pictus. 



Fig. 2. Alder Creek Lake (7800 feet altitude), Pine Forest Mountains, 

 Humboldt County, Nevada; July 26, 1909. The photograph shows the 

 character of the upper ridges of the western slope of the Pine Forest Moun- 

 tains, and indicates the glacial nature of the high country. Apparently 

 this lake was formed through the damming of a caiion by a moraine. 

 Other moraines are seen intersecting the lake. 



The scattered character of the timber is noteworthy. The scrubby 

 trees on the right-hand side of the lake are Cercocarpus ledifolius, the 

 pines in the foreground being Finns -flexilis. Empidonax icrighti an<l 

 Fenthcstes gamheli gamheli were common in the limber pines. 



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