V ° 1907' IV ] Chapman, The Eastern Forms of Geothlypis trichas. 33 
Wilson used the Brissonian name marylandica as a pure synonym 
of trichas, with which personatus of Swainson is also synonymous. 
Fortunately, therefore, unless someone desires the questionable 
distinction of standing as sponsor for the form lately known as 
trichas, we shall not have to consider its claims to nomenclatural 
standing but may apply Swainson’s name brachidactyla to all the 
Yellow-throats north of the range of trichas ( =ignota Chapm.). 
Thus we shall have in eastern North America: 
Geothlypis trichas trichas (Linn.). 
Southern Yellow-throat. 
Turdus trichas Ljnneeus, Syst. Nat., Ed. 12, 1, 1766, 293. (Type local- 
ity, Carolina.) 
Range. — Florida, westward through the Gulf Coast region to 
Texas; north through the Atlantic Coast region to Virginia (Dismal 
Swamp); winters from South Carolina southward and also in 
Cuba (c/. Ridgway). 
Geothlypis trichas brachidactyla (Swains.). 
Northern Yellow-throat. 
Trichas brachidactylus Swainson, Anim. in Menag., 1838, 295. (Type 
locality, “northern provinces of the United States”.) 
Range. — North America from the “more western portion of 
the Great Plains” (Ridgw.) eastward, north to Manitoba and 
southern Labrador, south to the Austroriparian region; winters 
from the Gulf States southward to the Bahamas, Greater Antilles, 
Mexico, and Central America. 
Origin of the Forms. 
An interesting fact developed by Mr. Palmer ( l . c.) in his dis- 
cussion of the relationships of these birds is that the central form 
of the Yellow-throat, to which he restricted the name trichas, 
averages smaller and paler than the form to the north and to the 
south of it. The extreme northern form of Yellow-throat, therefore, 
is, apparently, not connected with the southern Yellow-throat by, 
