344 University of California Publications in Zoology [Vol. 12 



a small grove of pines by the river, where we stayed from July 12 

 to 17. Here we found ourselves again in Siskiyou County. 



South Fork of the Salmon River heads in a semicircle of high 

 peaks of about 7500 feet altitude. Our camp was at an altitude 

 of 5000 feet, on the edge of a fine meadow of white clover inter- 

 spersed here and there with large patches of false hellebore. South- 

 west of us, looming up across the river, was a high rocky peak 

 with a good bit of snow on it, and beyond that was a sharp- 

 pointed peak of solid rock with precipitous sides, probably about 

 8000 feet in height. There is no heavy timber on either side of 

 the valley, but more on the east side than the west, where the 

 mountains are rocky and covered mostly with chaparral. The trees 

 around us were yellow, sugar, and tamrac pine, white fir, and 

 Douglas fir. The banks of the river were brushy with alders and 

 willows. We had evidently again reached the Canadian zone, and 

 a few new T birds were added to the inevitable juncos and chicka- 

 dees in the way of kinglets, both ruby-crowned and golden-crowned, 

 Lincoln sparrows, and creepers. 



Summerville. eleven miles down the river, was our next objective 

 point. This is the name given to a series of mines and farms 

 along the main Salmon River, 2000 feet below our last camp. 

 The change from firs and tamrac pines to oak, manzanita and scat- 

 tered madrone w r as very marked. The country looked dry and 

 unattractive after the higher mountain region; but the land can 

 be made to produce well under irrigation, as we saw on the farm of 

 Mr. Jack Hinz at whose place we stopped. His land lies on a 

 bench some distance above the river, back of which rise the hills, 

 while between them and the stream stretches a strip of glaring 

 rock and sand, the remains of former hydraulic mining. Across the 

 river the mountains rise steeply to a height of 5600 feet, covered 

 below with black oak, madrone, Douglas fir and sugar pine, and 

 higher up with a chaparral of chinquapin, white ceanothus and 

 manzanita, which runs to the top of the ridge. The zone at Sum- 

 merville may be considered high Upper Sonoran, with close invest- 

 ment on all sides by Transition. 



At Summerville Ave added to our party Mr. Jack Hinz, at whose 

 ranch we camped for a night, and who proved familiar enough 

 with the country to be able to follow up an old government trail 

 leading to the head of Grizzly Creek. Here we would be within 

 reach of the highest peak in the Salmon Mountains. It took us two 



