288 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



were present in limited numbers at Glenbrook and the sur- 

 rounding hills, a juvenile not long from the nest of the for- 

 mer and a female of the latter with an Qgg in the oviduct 

 proving that these two species breed here. 



The juvenile Audubon escaped in some thick brush, but the 

 female Black-throated Gray, taken on May 2, is No. 19940, 

 C. A. S. 



Several pairs of the Sierra Junco {Jiinco oreganus thruheri) 

 were seen in Cobb Valley and a male was taken near Glen- 

 brook on May 2 for the record. Golden-crowned Sparrows 

 were still in evidence that morning, several being seen near 

 the buildings in a hedge that seemed to be a favorite shelter 

 for this species throughout our stay there. This date may be 

 of some interest in the way of comparison of dates of migra- 

 tion of this species at various points. 



Around Glenbrook, as was the case in regard to most of 

 the localities visited on this trip, there was very little trash 

 lying on the ground in the woods or under the brush, nor 

 many dead leaves even where there were no signs of recent 

 fires. In fact, the surface of the ground was remarkably bare 

 in most places, as if all the leaves and branches that fell had 

 either been burned up or washed away by extremely heavy 

 rains, but there were neither ashes nor gullying to certify to 

 either of these causes for the absence of organic matter. 



One of the results of this condition was that but little cover 

 existed for insects or small rodents, and the scarcity of the 

 former may have more or less effect upon the bird life of the 

 country, especially as concerns those species of birds which 

 seek their food principally on the ground. 



The vicinity of Glenbrook having been pretty well pros- 

 pected by May 3, we started back for San Francisco, stopping 

 overnight at Mt. St. Helena to have another look for fox 

 sparrows, as related in a former paragraph. Finding nothing 

 of interest there and the weather being greatly against us, we 

 returned to San Francisco on May 4 to overhaul specimens 

 and refit for further work in other localities. 



In a paper published by Dr. Witmer Stone in 1904 (Proc. 

 Acad. Nat. Sci. Phila., 1904, p. 583), the Thick-billed Fox 

 Sparrow (Passerella i. megarhyncha) was mentioned as hav- 

 ing been taken in late spring and summer on Mt. Sanhedrin, 

 California, a mountain mostly in Mendocino County, and pre- 



