308 University of California Publications in Zoology [Vol. 10 



persal was under way, we did not ascertain the definite breeding 

 limits of the species. Adults were seen feeding young out of 

 the nest, at Kenworthy. on June 8. None was observed at Dos 

 Palmos in May and June, and probably they do not breed in 

 that vicinity; at the end of August several were seen there. 

 One or two were noted at the base of the mountains at Cabezon, 

 early in May, the only point on the desert side where the species 

 appeared to be breeding. There were a few at the Garnet Queen 

 Mine, in June, and two were seen on the summit of Santa Rosa 

 Peak, June 30. At other high mountain points. Strawberry 

 Valley, Tahquitz Valley, and Round Valley, in July, they were 

 exceedingly numerous, the majority of those collected being 

 young birds. They were fairly abundant on Thomas Mountain, 

 August 16 to 21. 



A juvenal collected in Round Valley, July 10, is beginning 

 to molt into winter plumage. One taken on Thomas Mountain, 

 August 18, has completed the change. 



Thirty-two specimens were collected, from the following 

 points: Schain's Ranch, four (nos. 1955-1958), Fuller's Mill, 

 two (nos. 2011, 2012), Strawberry Valley, sewn (nos. 2689- 

 2695), Tahquitz Valley, seven (nos. 2808-2814). Round Valley, 

 ten i nos. 2103. 2104, 2222-2229). Kenworthy. one (no. 2279), 

 Thomas Mountain, one (no. 3032). 



Certhia familiaris zelotes Osgood 

 Sierra Creeper 



We found the creeper only at points in the Transition zone 

 and upwards, and in but very limited numbers. In the Santa 

 Rosa Mountains a few were seen near the summits of Santa Rosa 

 and Toro peaks, probably not more than five or six altogether. 

 Two broods were encountered in Strawberry Valley early in 

 July, and a few were noted in Tahquitz and Round valleys 

 at various times ; but the species was never at all abundant. 



On Santa Rosa Peak, June 28, one was seen to alight upon 

 the face of a vertical rock, and ascend to the summit as if on 

 the trunk of a tree, searching the crevices for insects. 



