Distribution and migration of North American gulls and their allies . mon in Callao Bay, Peru, as late as April 11,1883 (Macfarlane), while a late date is that of one taken at Cham-perico, Guatemala, May 30, 1873 (Salvin). Other late spring datesare: Kerrville, Tex., May 17, 1910 (Lacey); Nishna Lake, Mo., May15, 1909 (Burnett); Wall Lake, Iowa, average date of the last seen,May 24, latest June 27, 1910 (Spurrell); Onaga, Kans., May 11,1910 (Crevecoeur); Clay Center, Kans., June 6, 1909 (Graves);Hudson, Kans., June 9, 1907 (specimen identified at Biological Sur-vey); and Aransas Bay, Tex., Jun
Distribution and migration of North American gulls and their allies . mon in Callao Bay, Peru, as late as April 11,1883 (Macfarlane), while a late date is that of one taken at Cham-perico, Guatemala, May 30, 1873 (Salvin). Other late spring datesare: Kerrville, Tex., May 17, 1910 (Lacey); Nishna Lake, Mo., May15, 1909 (Burnett); Wall Lake, Iowa, average date of the last seen,May 24, latest June 27, 1910 (Spurrell); Onaga, Kans., May 11,1910 (Crevecoeur); Clay Center, Kans., June 6, 1909 (Graves);Hudson, Kans., June 9, 1907 (specimen identified at Biological Sur-vey); and Aransas Bay, Tex., June, but not breeding (Armstrong). The earliest eggs were found at Heron Lake, Minn., May 25, 1885,May 8, 1886, May 18, 1890, and May 26, 1893 (Miller); near MarshLake, Minn., May 16, 1885 (Preston); and eggs heavily incubated,near Crane Lake, Saskatchewan, June 13, 1894 (Macoun). An enor-mous colony, estimated at 15,000 to 20,000 nests with eggs, was foundat Lake of the Narrows, Saskatchewan, June 9, 1905 (Bent). The 56 BULLETIN 292, U. S. DEPARTMENT OF Fig. 26.—Franklins gull (Larus frariklini). NORTH AMERICAN GULLS AND THEIR ALLIES. 57 next year not a nest could be found at this lake, owing to a droughtthat had lowered the water level. Fall migration.—A very early migrant was taken at Valparaiso,Chile, in September, 1859 (Philippi), though usually the species doesnot reach southern Texas until the last of that month (Armstrong).The extreme northern part of the range is deserted, however, at anearly date, since for 14 years the average date of the last one seen atAweme, Manitoba, is August 10, latest August 21, 1905 (Criddle);Harrisburg, N. Dak., latest October 1, 1901 (Eastgate); southeasternSouth Dakota, average of the last seen October 13, latest November12, 1891; Badger, Nebr., November 12, 1899 (Colt); Lincoln, Nebr.,November 17, 1900 (Wolcott); Lawrence, Kans., November 1, 1905(Wetmore); Madison, Minn., October 8, 1894 (Lano); West Depere,
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