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 t xo THE CONDOR [ 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, t893, four fresh eggs, found by L. P. Williams, San served; May 2, i897, five eggs, destroyed by unknown cause; May 26, I897, four egjs on point of hatching; June I, t899, three eggs badly incubated and not preserved. FOOD. Through the ki.ndness of the Biologi- cal Survey I am enabled to give the results of the examination of twenty-two (About  natural size.) Shoving substantial outer rim ou exposed side. Bernardino Co., set not preserved. The following nests were discovered by Mr. Harold S. Gay in the same locality and embrace those mentioned by Mr. Will- iams in his article m the Osprey: May x, t896, four eggs xvhich were found destroyed on visiting the nest two days later; May 3, x896, four eggs, set pre- stomachs, which were made by Prof. F. E. L. Beal. In tvo stomachs collected by Prof. Beal on June 27, x9oi, the average of vegetable matter was 979/o and of animal matter 3Y/O- In eighteen stomachs collected by Mr. Grinnell and myself on Sept. 22, i9ol, the average of vegetable nmtter is 88.49/O and of ani-