ZA. Loom is o// /iiids of Cluster Coiiiily, Sonlh Carolina. [ Jikhuiv 



hiiui, cannot !)e affirmed without more definite data. Tlie same 

 uncertainty exists in the southerly movement as to the points of 

 departure from the mainland, it being an open question whether 

 all follow the coast to Florida, or whether the transit is made in 

 the most direct way. 



IMie comparative abundance of Hcli/iini/iophila pcrcgriiia in 

 fall in Chester County is seemingly due to transalpine migra- 

 tion, as the species is reported rare along the Atlantic slope at 

 the northward. Its ap])arent absence in spring is probably occa- 

 sioned by the majority following the Mississippi Valley at that 

 season. Geothlypis agilis seems to afford a parallel case fur- 

 ther north. 



It may well be asked whether the southeasterly movement is 

 confined to certain characteristic species, or whether it embraces 

 many that are common both to the interior anil to tiie Atlantic 

 slope, or whether its proportions are vaster still, involving, to a 

 greater or less degree, all the migratory birds of North America. 

 The conformation of the continent favors such a movement. A 

 glance at the map discovers the southeasterly trend of the coast 

 along the Pacific from Cape Mendocino to the Isthmus of Pan- 

 ama. A migration extending through Mexico and Central Amer- 

 ica would be a southeasterly one, while a movement from the 

 South Atlantic vStates to the outer West Intlies would certainly 

 be southward and eastward if not directly southeast. 



To recapitulate, a wide-spread movement of characteristic 

 tians-Appalachian birds occurs after the breeding season, sweep- 

 ing over the country from the northwest to the southeast, the 

 main portion of the eastern wing crossing the Appalachian high- 

 lands in tlie South Atlantic States, its extreme outskirts reaching 

 northwanl along the whole Atlantic slope. vSome of the repre- 

 sentatives of this movement stop short their journey on arriving 

 on the South Atlantic seaboard, while others, occurring there as 

 transients or wintering numerously, extend their migrations 

 bevond to the Bahamas and Greater Antilles and northern South 

 America. 



In the complementary movement from the southeast to the 

 northwest, the western winter visitors of the South Atlantic 

 States disappear behind the moiwitains and their places are filled 

 by the returning migrants, and the movement is felt along the 

 whole Atlantic slope, strongly in the South Atlantic States and 



