348 The Ohio Journal of Science [Vol. XIX, No. 6, 



California, by at least the first of September. The earliest dates 

 on which Passerculus rostratiis rostratiis reaches various points 

 in its winter range are as follows: Yuma, Arizona, August 15, 

 1902; Ocean Beach, vSan Diego County, August 17, 1894; 

 Alamitos Bay, California, August 18, 1908; Santa Cruz, Cali- 

 fornia, August 27, 1895; Rosalia Bay, Lower California, August 

 16, 1896; San Quintin, Lower California, August 31, 1905; 

 San Jose del Cabo, August 31, 1887; Point Lobos, Sonora, 

 August 20, 1884. 



Thus the winter range extends southward, westward, and 

 northwestward like a very short widespread fan, with its axis 

 at the mouth of the Colorado River. The extreme length of 

 the winter range from northwest to southeast is approximately 

 1150 miles, while the known breeding area is only about 30 

 miles long. 



The greater part of the spring migration takes place usually 

 in late February and the first half or two-thirds of March, 

 though some birds stay until well into April. The latest 

 definite date of a bird known to be outside of its breeding 

 range is that of a specimen taken at Cape San Lucas, April 22, 



Of this subspecies a total of 279 specimens have been 

 examined, from the localities in the following list : 



Arizona. — Mouth of Colorado River. 



California. — San Pedro, (Nov. — , 1865; Dec. 8 and 13, 

 1899; October 30, 1901, Jan. 17, 1885); Ocean Beach, San 

 Diego County (Aug. 17, 1894); Sunset Beach, Orange County 

 (Dec. 27, 1916, Oct. 22, 1915, Jan. 10, 23, and 31, 1917); Seal 

 Beach (Dec. 19, 1914) ; Santa Barbara (Sept. 9, 12 and 13, 1911) ; 

 Bay City (Nov. 24, 1908); San Diego (Dec. 4 and 8, 1884, 

 Sept. 16, 1893, Nov. 16, 1861, Sept. 22, 1890, Dec. 7 and 18, 

 1885, March 1, 1885, Nov. 11 and 19, 1886, Sept. 5, 7, and 16, 



1893, Oct. 6, 16, 17, and 23, 1893, Feb. 15, 1884, Oct. 6, 12, 14, 

 15 and 20, 1903, Jan. 25 and 28, 1897, Jan. 31, 1895, Aug. 21, 

 1S93, Feb. 14, 1895, Jan. 22, 1896, Feb. 15, 1896, Dec. 11 and 18, 



1894, Oct. 30, 1S95) ; Alamitos Bay (Sept. 8 and 9, 1913, Dec. 

 23, 1913); Bayleys (Jan. 1, 1908); Pacific Beach, Los Angeles 

 County (Sept. 7, 8, 10, 13, 14, 15, 22, 24, and 26, 1904, Jan. 17, 

 1905, Feb. 10, 1911); Alamitos, Los Angeles County (Jan. 29, 

 1909); Balsa Chico, Orange County (Jan. 29, 1909); Newport 

 Landing, Los Angeles County (Feb. 23, 1886) ; Laguna Beach 

 (Aug. 25, 1887, vSept. 2, 1887); Wilmington (Dec. 14, 1879). 



