I lO 
THE CONDOR 
I Vol. IV 
by myself also has the bluish tint. Just 
why this sparrow should lay two types 
of eggs is a problem. 
In addition to the sets possessed by 
Mr. Brewster and the National Museum, 
and the one collected by myself, the 
following nesting dates may prove of 
interest: April 23, 1893, four fresh 
eggs, found by L. P. Williams, San 
served; May 2, 1897, five eggs, destroyed 
by unknown cause; May 26, 1897, four 
eggs on point of hatching; June i, 1899, 
three eggs badly incubated and not 
preserved. 
FOOD. 
Through the kindness of the Biologi- 
cal Survey I am enabled to give the 
results of the examination of twenty-two 
Sib' - ' 
wmimm 
NEST AND EGGS OF RUFOUS-CROWNED SPARROW. 
(About % natural size.) 
Showing substantial outer rim on exposed side. 
Bernardino Co., set not preserved. The 
following nests were discovered b}" Mr. 
Harold S. Gay in the same locality and 
embrace those mentioned by Mr. Will- 
iams in his article in the Osprey. May 
I, 1896, four eggs which were found 
destroyed on visiting the nest two days 
later; May 3, 1896, four eggs, set pre- 
stomachs, which were made by Prof. F. 
E L. Beal. In two stomachs collected 
by Prof. Beal on June 27, 1901, the 
average of vegetable matter was 97% 
and .of animal matter 3%. In eighteen 
stomachs collected by Mr. Grinnell and 
myself on Sept. 22, 1901, the average of 
vegetable matter is 88.4% and of ani- 
