269 



number was swelled by the presence of both transients and summer so- 

 journers. A decided northward impulse was observed daring the next 

 week. April 21 the first arrived at Richmond, Iowa; and April 26 at 

 the following places: Polo, 111.; Des Moines, Iowa; Iowa City, Iowa; 

 Grand Junction, Iowa; and Hastings, Minn. April 27 the first was seen 

 at Lanesboro, Minn.; April 28 at Lake Mills, Wis.; and April 30 at Red 

 Wing and Elk River, Minn. On the same day the bulk arrived at 

 Grand Junction, Iowa; Lanesboro, Minn.; and Manhattan, Kans. These 

 movements show that the line of heaviest and earliest migration was 

 along the Mississippi River. Thence it spread up the valleys of the 

 rivers and streams tributary to it. Migration seemed to be at its 

 height about the end of April. May 1 the first arrival was noted at 

 Green Bay, Wis., and the balk arrived at Elk River, Minn. May 5 

 Brown Thrashers were seen at Vermillion, Dak.; May 13 at Huron, 

 Dak.; and May 21 at Oak Point, Manitoba. Only one note of its breed- 

 ing was recorded* This was at Saint Louis, Mo., where young were 

 found as early as May 30. At Manhattan, Kans., they were building 

 May 9. 



In the fall of 1884 the following records were received of the south- 

 ward movements of the Brown Thrasher: At Williams town, Iowa, the 

 bulk left August 18, and the last August 29; at Unadilla, Nebr., the last 

 was seen August 23; at Des Moines, Iowa, September 17. The bulk 

 left Mount Oarmel, Mo,, September 20, and the last September 26. The 

 first reached Gainesville, Tex., September 26. 



In the spring of 1885 no notes were contributed on its movements 

 until it reached southern Illinois. It arrived at Shawneetown March 

 27. At Saint Louis, Mo., the first came April 2, two days earlier than 

 it was reported at Paris, 111., to which place it was carried by a tre- 

 mendous bird wave, which reached there the afternoon and evening of 

 April 4. To the westward of Saint Louis the birds waited for the next 

 warm wave, reaching Glasgow, in north central Missouri, April 6. In 

 the Ozark Hills, in southwestern Missouri, they were reported as arriv- 

 ing at Pierce City and Reeds April 4. Still farther w r est, in east central 

 Kansas (at Richmond and Manhattan), they did not put in an appear- 

 ance until April 15. The only station in the vicinity of the Mississippi 

 River at which they were reported between latitude 39° and latitude 

 41° was Griggsville, 111., where they were seen April 11. As this date 

 and locality coincided with the maximum of a warm wave, it may be 

 supposed that this wave carried the van to latitude 40°. 



The next movement was quite regular. It began at Ferry and Mount 

 Pleasant, Iowa, April 19 ; the next day extended to Iowa City, Iowa, 

 and crossed the river to Aledo, Tampico, and Hennepin, 111.; while the 

 third day a great rush brought the birds to Des Moines, Coralville, Grin- 

 n ell, and Newton, Iowa, Rockford, 111., and Lanesboro and Lake City, 

 Minn. This was one of the most pronounced movements of the whole 

 season of migration, and it was carried still farther forward on April 22 



