408 Vniversity of California Puhlications in Zoology. [Vol. 7 



the broad Leonard Creek flats, north of Sentinel Peak, and the 

 same number Avere seen at Leonard Creek Ranch. The last 

 mentioned birds were extremely shy. 



The shrike did not range much above the Upper Sonoran 

 zone. 



Habits. — Shrikes had evidently mated by the middle of May, 

 and their peculiar mechanical notes were not infrequently heard. 



Two nests were found, May 18 and 26 respectively, both at 

 Quinn River Crossing. The sites selected by the birds were con- 

 spicuous bushes relatively much larger and more prominent than 

 the surrounding sagebrush. The nests themselves were firmly 

 and symmetrically constructed. Both were very solidly sup- 

 ported by a number of live branches and built of coarse sticks. 

 The thorny branches of the Sarcohatus bush had been used in 

 the second. Fine dry bark, cowhair, horsehair, sage leaves, fine 

 gray twigs, rabbit fur, and a bird's feather were materials which 

 had been made use of for nest-lining purposes. The proportions 

 of these varied, the rabbit fur being very small in amount, and 

 the bird feather and horsehair being limited to a single spec- 

 imen of each found in one nest. The first nest was 1.01 meters 

 (40 inches) above the ground, the second .608 meter (24 inches). 

 Nest-cavity dimensions in both cases were 88 mm. (3i/o inches) 

 across by 76 mm. (3 inches) deep. 



Individuals were frequently seen near Big Creek Ranch on 

 the lower ridges of the mountains, where they perched on sage- 

 bushes or boulders. 



A family of adults and young was twice observed during the 

 first half of July in the neighborhood of the Dugout Camp in 

 Big Creek Canon. On July 17 a family of four was met with 

 near a haystack at Alder Creek Ranch. 



Vireosylva gilva swainsoni (Baird) 

 Western Warbling Vireo 

 Distribution. — Noted in the mountains, where it was found 

 in small numbers along the streams; at Big Creek Ranch (4350 

 feet. Big Creek Canon (4400 to 8000 feet), Duffer Peak :\readow 

 (8400 feet). Alder Creek (6000 to 7000 feet), and Leonard Creek 

 (6500 feet). The birds were noted in the greatest numbers at 



