1913] Grinnell-Swarth : Birds and Mammals of San Jacinto 299 



Dendroica auduboni auduboni (Townsend) 

 Audubon Warbler 



Seen migrating at Cahezon, at the north base of the moun- 

 tains, during- the first two weeks in May. Later in the summer 

 found breeding numerously in the Transition zoue and upwards. 

 Exceedingly abundant in Round Valley, Tahquitz Valley and 

 Strawberry Valley, and downward to a point a little above 

 Schain's Ranch, about 5000 feet altitude. The species was 

 present in the higher parts of the Santa Rosa Mountains, on 

 Santa Rosa and Toro peaks, but not numerous, not more than 

 twelve or fifteen of the birds being seen during a period of 

 several days. 



Young birds began to appear in July, and specimens col- 

 lected during the third week in July were well advanced in the 

 post-juvenal molt. An adult male was taken July 16 in which 

 the annual molt had already begun, apparently about ten days 

 in advance of the majority of the species, as represented by our 

 series. 



Thirty-eight specimens were collected, as follows : Cabezon. 

 one (no. 1768). Fuller's Mill, three (nos. 1986-1988), Straw- 

 berry Valley, nine (nos. 2617-2625), Tahquitz Valley, thirteen 

 (nos. 2735-2738. 2740-2745. 2766-2768). Round Valley, ten 

 (nos. 2111-2114, 2232-2236, 2739). Toro Peak, one (no. 2458), 

 Santa Rosa Peak, one (no. 2459). 



Dendroica nigrescens (Townsend) 



Black-throated Gray Warbler 



Common in high Upper Sonoran, and in Transition. Here, 

 as elsewhere in the mountains of southern California, closely 

 associated with the golden oak during the nesting period. Abund- 

 ant at Garnet Queen Mine. June 25 to July 2. full-grown young 

 molting into first winter plumage being secured, and a female 

 seen carrying nesting material at about the same date. A few 

 seen from time to time in the brushy hills above Kenworthy. 

 Numerous and breeding at Fuller's Mill and in Strawberry Val- 

 ley. They began to appear in Tahquitz Valley the third week 



