182 THE WILSON BULLETIN— December, 1921 



days (Stanwood, Wils. Bui., 95, 64, also Bd.-Lore, xii, 103, and Auk, 

 xxvii, 418); 12 days (Perry, Auk, xxxv, 321.) 



American Robin, 11-12 days (Herrick, Home Life, 40 and 47); 

 12 days (Redfield Ms.; Stanwood, Home Progress, 5, 310); 12-13 

 days (Tyler, Auk, xxx, 395 and 398); 13 days (cullette, Bd.-Lore, 

 vlii, 129; Judson, lb., xvii, 213); 14 days (Howe, Auk, xv, 165; 

 Chapman, Eds. E. N. A., rev. ed., 68.) 



Western Robin, 10-11 days (Saunders, Condor, xvi, 143.) 



Bluebird, 15 days (Knight, Bds. Me., 643); Id days (Hodge, 

 Bd.-Lore, vi, 44; Hubbard, lb., xi, 66; Boulton, lb., xviii, 125); 18 

 days (McKinnon Ms.) 



Mountain Bluebird, more than 12 aays (Wheelock, Bds. Calif., 

 508.) 



^ Some twelve years ago, in collaboration with Dr. Lynds Jones, 

 printed forms were circulated among the members of the Wilson 

 Ornithological Club for a cooperative study along certain lines of 

 the nesting habits of our birds and a number of original observa- 

 tions were received by the writer from Dr. G. C. Fisher while at 

 DeFuniak Springs, Fla.; Cold Spring Harbor, Long Island; But- 

 ler, Logan and Miami Cos., Ohio; Messrs. T. A. Elliot, Jr., North 

 East Harbor, Maine; J. F. Ferry, Lake Forest, 111.; H. E. Haughey, 

 Bangs, Ohio; Henry Link, Waterloo, Ind.; R. F. Miller, Frankford, 

 Pa.; Angus McKennon, DeFuniak Springs, Fla.; 1^. S. Pierson, 

 Valley Forge and Wayne, Pa.; A. C. Redfield, Wayne, Pa., and 

 Barnstable, Mass.; A. C. Read, Isle of Pine,» Cuba; C. H. Rogers, 

 Princeton, N. J.; E. W. Vickers, Elsworth. Ohio; Mesdames G. K. 

 Holmes, Summit, N. J.; O. M. Schantz, Morton Park, 111, and 

 Farida Wiley, Sidney, Ohio; before the project was abandoned. 

 This paper is wi'itten in order to keep faith with tlie observers 

 who contributed some very full reports. I am also indebted to 

 Dr. C. W. Townsend, Messrs, 0. E. Baynard, A. B. Howell, G. 

 Willett, and J. H. Gurney (of Norwich, England) for information. 



