32 Chapman, The Eastern Forms of Geothlypis trichas. [jan 



figure is of the same size with mine, and hath such a black line 

 from the forehead drawn through the eye: it hath, I believe, 

 never till now been described, Petiver having given it only a name. 



"P. S. Since the writing of the above, I have received the 

 Yellow-Throat, together with a drawing of it, very neatly and 

 exactly done, by Mr. William Bartram, of Pensylvania, who 

 hath enabled me to give a further account of this bird; for he says, 

 it frequents thickets and low bushes by runs (of water, I suppose, 

 he means) and low grounds; it leaves Pensylvania at the approach 

 of winter, and is supposed to go to a warmer climate." 



The "Carolina" of Edwards, who wrote in 1758, included the 

 North and South Carolina of to-day, his type, therefore, coming 

 from within the range of ignota. The question, however, may 

 properly be asked whether Edwards's type was not a migrant 

 and hence, under the current status of this group, either trichas or 

 brachidactyla. But, assuming that Edwards's type had come 

 from Maryland, it might with equal pertinence be asked, how 

 should we know that it was not a migrant brachidactyla ? 



Again it has been said that the pre: ?oi writer refused to accept 

 Audubon's name roscoe for a Yellow-throat described from Mis- 

 sissippi as applicable to the form known as ignota on the ground 

 that Audubon's type was doubtless a migrant from the north. (It 

 was shot in September). The name roscoe was not rejected pri- 

 marily for this reason, but because Audubon himself, presumably 

 on the basis of actual specimens, referred his roscoe to the bird 

 then known as trichas, and without positive evidence which would 

 prove him to have been in error we have absolutely no right to 

 reverse his determination. 



On the basis, therefore, of locality alone, the name trichas is 

 applicable to the southern Yellow-throat heretofore known as 

 ignota; but, as a matter of fact, we have something more than 

 mere locality on which to base an opinion, Edwards's figure and 

 description being obviously more applicable to the southern than 

 to the northern bird, while, although this now has no nomenela- 

 tural bearing on the matter, Audubon's figure of roscoe is quite as 

 certainly not based on the southern form. 



What then, assuming that this view of the matter is correct," 

 becomes of the form lately known as trichas, the Maryland Yellow- 

 throat ? 



