1S91.] LooAUb on Biids oj Client CI Couiiiy, South Carolina. C -? 



alpcslris praticola raises tlic ciucstion whether Chester County 

 examples do not come from the eastern portions of those sec- 

 tions as well as from west of the mountain system. The abun- 

 dance of the former in New England and its appearance here 

 during fall associated with quiscula proper seems to signify 

 that birds are drawn from both regions. Otocoris alpestrls 

 praticola. however, breeds too sparingly near the coast to 

 supply many representatives by the seaboard route. 



So far as the South Atlantic States are concerned, the numbei- 

 of characteristic species involved in this movi.-ment is at present a 

 matter of speculation. A thorough survey of the region alone 

 will determine the strength of the representation as well as the 

 relative abundance of the birds now known to occur. 



Whether there are meteorological conditions that specially 

 tavor southeasterly migration, might be made a theme of profit- 

 able inquiry. As set forth beyond, a correlation has been found 

 to exist between cold and warm waves and the fluctuations in 

 abundance of Otocoris a/ pest r is praticola. 



The movement from the south must now in turn be examined. 

 The absence in spring of birds of the first category, and the rarity 

 of those of the third, north of the South Atlantic States prove 

 that the return over the mountains is eflected in the soutiiern 

 portions of the system. It is olwious that the most direct route 

 for winter residents of the Bahamas and Florida to the interior is 

 across the mountains of the South Atlantic States. Dcndroica 

 kirtlandi in April in the lower pait of the State (Auk, Vol. Ill, 

 July, 1SS6, p. 412) is indication of the route from the Bahamas, 

 as also is JDendruica pahnartim in Chester County from the 

 region immediately to the south and southeast. Sci?ir7is novc- 

 boracensis no tab His in transitu on the Dry Tortugas {vide Scott, 

 Auk, Vol. VII, p. 314) and in Cliester County, vaguely marks 

 out a line of migration from northern South America. The two 

 instances reported from the vicinity of Washington (Auk, Vol. V, 

 April, iSSS, p. 148) are accounted extreme exemplifications of 

 the movement from the southward, Dendroica pahnarum., fur- 

 ther north, furnishing an additional illustration. Whether tlie 

 mountains, — especially influential factors in distribution when 

 the season of reproduction approaches, — deflect the line of mi- 

 gration of these outlying birds, causing them to ci'oss higlier iip^ 

 or wlietlier they journey by a more easterly course, regardless of 



