314 Univt rsity of California Publications in Zoology [Vol. 10 



ing a cienaga in Tahquitz Valley. Two juvenals were secured. 

 the rest taking refuge in the tree tops, where they easily eluded 

 observation. The next day. duly 27. another flock was seen in 

 Round Valley, but in the tops of the pines out of reach. On 

 duly 29 one was taken in Tahquitz Valley. The first two speci- 

 mens ( nos. 27!)2, 2793), both females, are in Juvenal plumage 

 throughout. The last (no. 27!>.~> i is a young male molting into 

 firsl winter plumage. The capture of these birds in the manner 

 described is undoubtedly indicative of their breeding at this 

 point. The southernmost breeding station previously recorded 

 for California is the San Bernardino Mountains (Grinnell, 1908, 

 p. 126), and the present instance carries the breeding range south- 

 ward to the southernmost extension of the Boreal /.one within 

 the stale. 



Regulus calendula cineraceus Grinnell 

 Ashy Kinglet 



In Tahquitz Valley and in Round Valley, during duly, king- 

 lets were seen or heard almost daily, and the species probably 

 breeds in fair abundance everywhere on the higher slopes leading 

 up in San Jacinto Peak, from aboul 8000 feel upward. From 

 their habit of frequenting the tree tops the birds were not 

 easily or frequently observed, but the loud, clear song was 

 evidence enough of their presence. After the young had left 

 the nest they were more frequently seen in the willow thickets 

 bordering the cienagas and streams. 



Three adults were taken in Round Valley, July 8 and 11 (nos. 

 2182 -2184). Two juvenals were taken in Tahquitz Valley, July 

 28 and 29 (nos. 2791, 2794), one in Juvenal plumage throughout, 

 the other with new feathers appearing on the throat and breast. 

 Two were secured in Round Valley, August 2, a young male (no. 

 2789) Just beginning the post-juvenal molt, and an adult female 

 (no. 2790) which was in the midst of the annual molt. 



Polioptila caerulea obscura Ridgway 

 Western < riiatcatcher 



An abundant species in the Upper Sonoran chaparral on the 

 Pacific side of the mountains. About Kenworthy, at the end of 

 May and early in June, they were noticeably numerous, probably 



