^6 Oberiiolser, Nezv Subspecies of Dcndroica. \^i^ 



lower tailcoverts are like Ihe belly. The paler, duller color of the lower 

 surface serves to distinguish this species at once from the more richly 

 colored grayi. 



It is closely related to M. grayi which it probably replaces in the 

 region where it occurs. This supposition is based upon the fact 

 that among the considerable series of .^.w^jv' before me from various 

 parts of Mexico not one is from the State of Tamaulipas, while 

 the present species is unrepresented among the considerable series 

 of that bird from the neighboring State of Vera Cruz. 



DESCRIPTION OF A NEW SUBSPECIES OF DEN- 



DROICA. 



BY HARRY C. OBERHOLSER. 



A RECENT careful examination of the series of Yellow Warblers 

 contained in the United States National Museum has revealed the 

 existence of a well-defined geographical race of Dcndroica a;stiva^ 

 which has hitherto been recognized only in synonymy. The 

 subspecies in question should, therefore, now be known as 



Dendroica aestiva rubiginosa {Pallas'), subsp. restit. 



Alaskan Yeli,ow Warbler. 



Motdcilht rubiginosa Pallas, Zoogr. Rosso-Asiat. 1, (1811.?) 1S31, 496.' 



Chars subsp. — D. aestivae morcomo sat similis, sed eorpore supra 



olivaceo-viridi obscuriore fere unicolore, vertice et uropygio vix fiavescenti- 



' All other of the numerous synonyms of Dcndroica astiva apply with 

 reasonable certainty to the eastern form. The bird which Pallas described 

 (/. c.) was from Kadiak Island, Alaska, and is fairly well characterized in 

 his diagnosis, the essential portions of which are herewith presented, 

 italicized as in the original : 



" Motacilla rubiginosa. 



M. flavissima, . . . pectori lituris longitudinalibus riifis, rectricibus 

 flavis fusco marginatis. Vibrissae narium et frons ad medium usque 

 verticem, lateraque capitis et subtus avis tota citreo-flava ; frons virescenti 

 nebulosa. . . . Cervix cum dorse uropygioque vuescit." 



