224 Trans. Acad. Sci. of St. Louis. 



our northern border where the first arrive about the 12th or 

 14th of April the species has in some years not been noted before 

 the 25th (1897, 1901, at Keokuk). The bulk, the great army, 

 spreads over most of the state during the second and third week 

 of April and remains to the end of the fourth week'. The dura- 

 tion of their stay with us varies greatly; in some years they 

 pass through rapidly, in others they remain conspicuously 

 abundant for a longer time. In 1878 the last Yellow-rump 

 was noted at St. Louis, April 29; in 1886, May 18; in 1907, May 

 21; but usually between May 6 and 12. The wave of south- 

 bound Yellow-rumps reaches the northern border of Missouri 

 in the latter part of September, the earliest at Keokuk being 

 September 11, 1894, and September 12, 1899, the bulk about 

 October 1. St. Louis is seldom reached before October first, 

 and then only by small numbers. Earliest at St. Louis, Sep- 

 tember 17, 1897, and September 23, 1896. The first cross the 

 southern border line about October 10. The bulk is somewhat 

 irregular in its transit through the state, some years, following 

 the first within a few days, early in October, in others not before 

 the second and third week of the month. In northern Missouri 

 migration is over from the middle to the last of October (October 

 14, 1896; October 26, 1897); in central Missouri it continues 

 to the first, sometimes the second week in November (Mt. Carmel, 

 November 3, 1884; November 11, 1885). In the neighborhood 

 of St. Louis where they may be regarded as irregular winter 

 visitants, all are gone in some years before the middle of No- 

 vember (November 7, 1882; November 11, 1885). The ex- 

 ceptional occurrence of a singing male Yellow-rump in summer 

 (June 21, 1897) in St. Louis Co. is reported by the writer in 

 ^^The Osprey," vol. 2, No. 3, page 40. 



657. Dendroica maculosa (Gmel.). Magnolia Warbler. 



Motacilla maculosa. Sylvia maculosa. Sylvicola maculosa. Sylvia rnag- 

 twlia. Black and Yellow Warbler. 



Geog. Dist. — Eastern North America, north to Newfoundland, 

 Anticosti, Magdalen Islands, southern shores of Hudson Bay 

 Great Slave Lake and Mackenzie River; west to British Columbia 

 and eastern base of Rocky Mountains. Breeds from Massa- 

 chusetts, mountains of Pennsylvania, northern part of lower 

 Michigan, northern Minnesota and northern Manitoba and 

 Assiniboia northward. Winters from eastern Mexico to Panama. 



