251 



one of the commonest Warblers during spring migration. He recorded 

 it as late as May 5. The record shows that in 1884 the species was 

 observed at latitude 37°, May 8; latitude 39°, May 11; and latitude 

 45°, May 26. Females were seen at Chicago May 23. If the observers 

 knew anything more about the movements of the species they failed to 

 communicate the fact. 



In the spring of 1885 the first Bay-breasted Warbler was reported 

 from Pierce City, Mo., May 7 ; Saint Louis, May 15 ; Lanesboro, Minn., 

 May 18 ; and Elk Kiver, Minn., May 20. One was taken at Tampico, 

 111., during the spring of 1885. 



In the fall of 1885 the first and last was seen at Saint Louis Septem- 

 ber 25. 



661. Dendroica striata (Forst.). [101.] Black-poll Warbler. 



Breeds north of the United States. Few Warblers perform more ex- 

 tended migrations than the Black-poll. The equator and the Arctic 

 Ocean form the extreme objective points of its periodical movements. 

 The earliest record of its migration in 1884 came from Danviile, 111., 

 where it was noted April 27 — two days earlier than it was seen at 

 Saint Louis, nearly a hundred miles farther south. This circumstance 

 taken alone would scarcely call for remark, but in studying migration 

 in this region it is found that more than twenty species were recorded 

 at Danville from two to ten days earlier than at Saint Louis. It is 

 evident, then, that some species migrate earlier in the valleys of the 

 Ohio and Wabash than in the same latitude along the Mississippi, al- 

 though this latter route is usually considered, and not without reason, 

 as the most favorable in the United States. Stations in extreme east- 

 ern Illinois are so few that an extended comparison of dates can not be 

 made, but the records seem to indicate that migration in favorable lo- 

 calities along the eighty-eighth meridian is slightly in advance of that 

 along the Mississippi Biver and the ninety-first meridian up to about 

 Chicago, where the rate of travel along the two routes seems to be about 

 the same. North of Chicago migration by the western route is in ad- 

 vance. This, however, is mainly surmise, and these opinions may be 

 reversed by future and more extended observations. The subject is 

 mentioned here merely to call attention to its importance in future in- 

 vestigations. 



Continuing the record north of Saint Louis, it is found that the 

 Black-poll Warblers arrived at Alda, Kebr., May 3; at Iowa City, Iowa, 

 May 17; Polo, 111., May 19; and Lanesboro and Heron Lake, in Minne- 

 sota, and West De Pere, Wis., May 20 and May 21. The bulk came to 

 Saint Louis May 7 and stayed six days; to Manhattan, Kans., May 13, 

 and remained but two days. Irregular and very early dates are May 5 

 at latitude 42° 18' in Iowa; May 1 at latitude 44° 32' in Minnesota; May 

 4 at latitude 44° 45' in Wisconsin ; and May 18 at latitude 45° 25' in- 

 Minnesota, 



