38 



Sierra Club Bulletin. 



The nest is almost entirely and very compactly made of 

 dry-grass stems and roots. These have the appearance 

 of having been uprooted and are of course of the previous 

 season. As the nearest available grass is half a mile or 

 more from the nesting site, the reason why the building 

 birds made such long trips for material is explained. 

 Fine light-colored grass forms the lining, with the ad- 

 dition of a few feathers. One of the latter runs length- 

 wise across the bottom of the nest cavity, dividing it in 

 half. Unfortunately a fluffy feather belonging to the 

 nest was blown away on the peak and lost. The nest is 

 oval in shape and the dimensions are as follows: Top, 

 5 X 3^ inches ; cavity, 2^ x 3 inches ; depth of cavity, i 

 inch; depth of nest over all, 2^ inches. 



