UK Bulletin Wisconsin Natural History Society [Yol. 13, No. 2 
12. Coues, E.: Birds of the Northwest. 1S74, p. 157. 
13. Coues, E. : Key to North American Birds. Yol. I, 5th ed., 1903, p. 440. 
14. Davie, O. : Nest and Eggs of North American Birds. 1S98, p. 377. 
15. Dunn. J. O. : Auk. vol. XII, 1S95, p. 395. 
16. Hatch. P. L. : Notes on the Birds of Minnesota. Geol. and Nat. 
Hist. Surv. Minn., 1892. p. 320. 
17. Jones, L.: Birds of Ohio. Ohio State Acad. Sci., Spec. Paper No. 
6, 1903, p. 219. 
18. Judd, S. J. : Relation of Sparrows to Agriculture. Bull. 15, U. S. 
Dept. Agr.. Div. Biol. Surv., 1901, p. 68. 
19. Kumlien. L.. and Hollister. N.: Birds of Wisconsin. Bull. Wis. 
Nat. Hist. Soc., vol. 3 (N. S.), nos. 1, 2, 3, Jan.-July, 1903, p. 98. 
20. Macoun, J.. and J. M.: Catalogue of Canadian Birds. Canada Dept. 
Mines, Geol. Surv. Branch. No. 937. 1909. p. 510. 
21. Nelson, E. W.: Birds of Northeastern Illinois. Bull. Essex Inst. 
vol. YIII. Dec.. 1S76, p. 108 (see also Brewster (6)). 
22. Polig, O. C.: Auk., vol. VII, 1890, p. 241. 
23. Ridgway, R.: Bull. Nutt. Orn. Club. 1880, p. 30. 
24. Ridgway, R.: Ornithology of Illinois. Nat. Hist. Surv. 111., State 
Lab. Nat. Hist., vol. I, 18S9. p. 266. 
25. Ridgway. R.: Birds of North and Middle America. Bull. 50, U. S. 
Nat. Mus.. Part I, 1901. p. 331. 
26. Roberts: Bull. Nutt. Orn. Club, vol. IV, 1879, p. 154. 
27. Wisconsin Arbor and Bird Day Annual. Madison. Wis., 1909-1913. 
28. Woodruff. F. M.: Birds of the Chicago Area. Bull. YI, Chicago 
Acad. Sci.. 1907, p. 139. 
29. Wyman, L. E. : Auk, vol. XXY, 1908, p. 82. 
References by States 
Illinois: 6. 10, 11. 13, 15, 21, 22, 23, 24, 28, 29. 
Indiana: 7, 10. 
Iowa: 2, 9, 12, 13, 14. 
Michigan: 4, 10. 
Minnesota: 9, 10, 12, 16, 26. 
Ohio: 10, 14, 17. 
Wisconsin: 5, 8, 9, 10, 11, 19, 24, 27. 
General: 1, 3, 8, 9. 13, 14, 18, 20, 25. 
Zoological Laboratory, 
University of Wisconsin. 
Feb. 25, 1915. 
