248 JJnivi rsity of California Publications in Zoology L VoL - 1° 



is no question as to the identification. The white-throated swift 

 (Aeronaut) s melanoleucus), was frequently seen in the same 

 place, occasionally at the same time that the black swifts were 

 under observation, and there was never any difficulty in dis- 

 tinguishing the two species. 



The black swifts were noted only during a week of cloudy, 

 showery weather-, presumably they fed at other times at too high 

 an altitude to he seen from the valiev. 



Chaetura vauxi (Townsend 

 Vaux Swift 



Migrating birds, heading for the coast through San Gorgonio 

 Pass, were seen daily in some numbers at Cabezon, May LO to 

 l<i. Otherwise observed only at Vallevista, where a single bird 

 was seen Augusl i'!». doubtless in the return migration. 



Two specimens were taken, at Cabezon, May l'» and 11 (nos. 

 1711, 1712). 



Aeronautes melanoleucus Baird) 

 White-throated Swift 



An abundant species throughout the San Jacinto Mountains; 

 seen at practically every point visited, and doubtless breeding in 

 suitable spots in all parts of the range. White-throated swifts 

 were seen flying over the meadows in Hemel Valley, over the 

 extreme summits of San Jacinto Peak and Toro Peak, the two 

 highest points in the mountains, and over the desert, below Palm 

 Canon. Snow Creek, and ( 'a be/on. They were particularly 

 numerous in and about Deep ('anon, in June, the extremely high 

 and precipitous enclosing cliffs supplying an ideal summer 

 habitat. 



Three specimens were preserved: an adult female. Cabezon, 

 May 12 i no. 1713), an adult female. Kenworthy, dune :! (no. 

 2285), and an adult male. Ilemet Lake, August Id (no. 3002 . 

 The last is in the midst of the annual molt. 



