212 THE RAPTORIAL BIRDS OF IOWA 



Otus asio (Linnaeus). 



* Say, Thomas, in Major S. H. Long's Account of an Expedition from 



Pittsburgh to the Rocky Mts., 1819-20, p. 370. (Engineers Canton- 

 ment, Pottawattamie County.) 



*Allen, J. A., Notes on the Birds Observed in Western Iowa in the 

 months of July, August and September: Memoir of the Boston 

 Society of Natural History, Vol. 1, p. 499, 1868. 



* Allen, J. A., Catalogue of the Birds of Iowa: Geology of Iowa, White, 



Vol. 2, App. B, p. 424, 1870. 

 *Trippe, T. M., Notes on the Birds of Southern Iowa: Proceedings of the 



Boston Society of Natural History, Vol. 15, p. 242, 1872. (Decatur 



and Mahaska Counties.) 

 *Beal, F. E. L., Bird Migration of the Mississippi Valley from Notes 



Collated by W. W. Cooke: Forest and Stream, Vol. 19, p. 306, No. 



16, 1882. (Ames.) 



*Jones, Lynds, Ibid., p. 306. (Grinnell.) 

 *Williams, Mrs. V. S., Mississippi Valley Migration: Ornithologist and 



Oologist, Vol. 8, No. 5, p. 33, 1883. (Coralville.) 



* Jones, Lynds, The Number of Eggs in a Set: Ornithologist and Oologist, 



Vol. 7, No. 10, p. 188, 1887. (Grinnell.) 

 Warren, B. H., Birds of Pennsylvania, p. 114, 1888. 

 *Jones, Lynds, A List of Birds found in Eastern Jasper and Western 



Poweshiek Counties, Iowa: The Curlew, Vol. 1, No. 6, p. 52, March, 



1889. 



Ridgway, R., Ornithology of Illinois, p. 415, 1889. 

 *Keyes, Charles Rollin, and Williams, H. S., M. D., Preliminary Annotated 



Catalogue of the Birds of Iowa: Proceedings of the Davenport 



Academy of Natural Sciences, Vol. 5, p. 130, 1889. 

 *White, H. G., Geographical Variation of Eggs: Ornithologist and Oologist, 



Vol. 15, No. 1, pp. 2, 3, 1890. 

 *Kelsey, Carl, Birds of Poweshiek County, Iowa: Ornithologist and 



Oologist, Vol. 16, p. 132, 1891. 

 *Sheldon, Frank W., In Camp at Twin Lakes: Ornithologist and Oologist, 



Vol. 16, No. 10, pp. 155, 157, 1891. 

 *Henning, C. F., An Afternoon Ramble: Ornithologist and Oologist, Vol. 



16, No. 12, p. 180, 1891. (Gilbert Station, near Ames.) 

 Goss, N. S., History of the Birds of Kansas, p. 302, 1891. 

 *Jones, Lynds, in Bendire's Life Histories of North American Birds, 



Vol. 1, pp. 356, 357, 1892. (Grinnell.) 



*Osborn, Herbert, A Partial Catalogue of the Animals of Iowa Repre- 

 sented in the Collections of the Departments of Zoology and Ento- 

 mology of the Iowa Agricultural College, p. 7, 1892. 



Hatch, Dr. P. L., Birds of Minnesota, p. 214, 1892. 



Fisher, A. K., Hawks and Owls of the U. S., p. 163, 1893. 



*Andereon, R. M., Owl Notes: The Nidologist, Vol. 2, No. 6, p. 79, Feb- 

 ruary, 1895. 



