238 Trans. Acad. Sci. of St. Louis. 



*681(1. Geothlypis trichas brachidactyla (Swains.). Nor- 

 thern Yellow-throat. 



Sylvia trichas. Trichas marylandica. Trichas personatus. Maryland Yel- 

 low-throat. 



Geog. Dist. — Northeastern United States and southeastern 

 British Provinces, from Newfoundland, southern Labrador, 

 Quebec, Nova Scotia, New Brunswick, New England, New York 

 and northern New Jersey westward to northern Ontario, 

 Michigan, Wisconsin, Minnesota, eastern Dakota, Athabasca 

 and Alberta; southward through the Mississippi Valley to up- 

 land of Gulf States and eastern central Texas. In winter to 

 Bahamas, Cuba, Jamaica, Swan Island and through eastern 

 Mexico to Costa Rica; during migration whole United States 

 east of the Great Plains. Yellow-throats which winter in south- 

 ern Louisiana and Texas are said to belong to the subspecies 

 ignota and trichas. The YeUow-throats of eastern North 

 America are at present (1907) split into three subspecies, of 

 which the northern has the largest range; ignota is the south- 

 eastern form, from Virginia along the edge of the coastal plain 

 to southern Georgia and Florida, thence westward to Louisiana. 

 The typical trichas triclias has the smallest range between the 

 two others on the Atlantic coast from Georgia to Maryland 

 and southern New Jersey. 



The Yellow-throat is one of the commonest, probably the 

 most common, of summer resident warblers in Missouri; it 

 inhabits forest and swamp as well as cultivated land and is found 

 in the Ozarks and prairie region, in the bottoms as well as on 

 the bluffs of our rivers throughout the state. Like many other 

 summer sojourners it begins to return to its breeding grounds 

 in the peninsula of the southeast much eariier than to the rest 

 of the state and was found in Pemiscot Co. as early as April 

 8, 1893. The earliest at St. Louis is April 14, 1887, but as the 

 weather at that time is often adverse to bird migration, the 

 majority of records of first arrivals is between April 17 and 

 21, in some years even a few days later. April 27 is the day 

 when it is numerous and noisy, indicating the arrival of the 

 bulk, including females; and large numbers of transients remain 

 with us during the first week of May, when the species is met 

 with everywhere, even in gardens, orchards and places where it 

 does not nest. In northern and western Missouri it is usually 

 a few days later than at St. Louis, being noted first during the 

 fourth week of April and at the northern border at Keokuk 



