1911 J Todd, Bahaman Species of Geothlypis. 241 



" superciliaries " J are grayish white, sometimes very faintly tinged 

 with pale yellowish behind the eyes. In G. maynardi the back is 

 brighter olive green, the crown averages more greenish, and the 

 superciliaries are more decidedly tinged with yellow. There is, 

 however, considerable individual and seasonal variation in all 

 these respects. Several specimens taken in May and June are in 

 more or less worn breeding dress, and in these the gray of the crown 

 (which is mainly superficial) is scarcely obvious, the color being 

 dull greenish. The type of G. flavida I have not seen, but the 

 only other specimen referred to this form by Mr. Ridgway (No. 

 3376, Bangs Collection), now before me, I should judge to be 

 merely a worn example of G. maynardi. At any rate, it certainly 

 agrees very closely, allowing for its more worn and faded condi- 

 tion, with a skin of G. maynardi (No. 189826, U. S. National Mu- 

 seum) dated June 18. Additional corroborative evidence on this 

 question is afforded by a study of the effect of wear in the case of 

 G. beldi?igi, 2 a species closely allied to the Bahaman bird, although 

 widely separated therefrom geographically. In this species there 

 is a decided difference between birds in winter and in worn breeding 

 plumage. Many individuals in the latter dress have no vestige 

 of brown (corresponding to the gray of the Bahaman species) on 

 the crown and occiput, while the post-facial band is wider, and 

 brighter yellow, passing into yellowish green posteriorly, giving a 

 much brighter general effect. The changes due to wear in this 

 species, therefore, are evidently precisely analogous to those in 

 the Bahaman bird which have led to the separation of the so-called 

 G. flavida. Under such circumstances I think that there can be 

 no doubt as to the propriety of dropping the latter from further 

 consideration. 



Measurements of the two supposed New Providence forms, as 

 per the subjoined tables, and indicated by Mr. Bangs, show a small 

 average difference in the wings, and tail, G. maynardi being slightly 

 the larger in these respects. In the case of the females the color- 



1 I. e., the line along the upper margin of the black ' 'mask," from above the eye 

 to the nape. 



2 I am indebted to Mr. William Brewster and Mr. John E. Thayer for the loan 

 of their respective series of this species, which, taken in connection with the mate- 

 rial in the Carnegie Museum, has furnished an ample basis for study. 



