466 Oberholser, Notes on North American Birds. [oct. 



Joseph Grinnell and a few western ornithologists, have refused it 

 recognition, and Mr. J. H. Riley has recently l expressed serious 

 doubts regarding its validity. Its failure of recognition has 

 probably been due chiefly to the statement of the original describer, 

 that it differs from Dendroica coronata coronata only in somewhat 

 greater size. Examination of a large series now shows that Den- 

 droica coronata hooveri is a recognizable race and that it differs from 

 Dendroica coronata coronata not only in its larger size but in the 

 coloration of male, female, and even young. The male has less 

 black on the lower parts, that on the jugulum and on the sides of 

 the breast being more broken by white; and the yellow of rump 

 averages paler. The female has the upper parts more grayish 

 (less rufescent brownish) and also the yellow of the rump usually 

 somewhat lighter. Juvenal birds are usually darker, duller, less 

 rufescent brown above than examples of Dendroica coronata 

 coronata in the same stage. 



The geographic distribution of Dendroica coronata hooveri is as 

 follows: Western North America. Breeds north to northwestern 

 Mackenzie, northern Yukon, and north central Alaska; west to 

 western Alaska; south to southern Alaska, central British Colum- 

 bia, and central Alberta; and east to eastern Alberta and central 

 Mackenzie. Winters north at least to California, New Mexico, 

 and Texas; south to the state of Vera Cruz in Mexico, and south- 

 ern Lower California. 



Acanthis hornemanni exilipes (Coues). 



Redpolls are among the most difficult of American Fringillidse. 

 The relationships of the forms of the genus Acanthis were for many 

 years imperfectly understood. Recently, also, the subspecific 

 assignment of Acanthis hornemanni exilipes has been questioned, 2 

 but on the basis of winter specimens, which are always more or 

 less unsatisfactory for the delimitation of geographic races. It is 

 claimed by this author 3 that Acanthis hornemanni exilipes is a 



1 Canadian Alpine Journal, Special Number, 1912 [February 17, 1913], pp. 70-71. 



2 Brooks, ' The Auk,' XXXIV, No. 4, January, 1917, p. 44. 



3 Brooks, loc. cit. 



