^Ozj. Ridgway on Junco cinereus ,nu/ its Geographical Races. L 0ctollcr 



that y. cinereus proper must be excluded from the list of North 

 American birds, all the specimens from within the borders of 

 the United States which have been referred to this form being 

 very different, belonging in reality to an unnamed geograph- 

 ical race. It is with extreme reluctance that I venture to de- 

 scribe an additional form of this difficult genus, but the facts 

 before me are so plain that I cannot well avoid doing so. 



y. cinereus. as at present known, is divided into three strongly 

 marked races, between two of which (dorsalis and the new form) 

 we have evidence of intergradation in a small proportion of in- 

 termediate specimens. In the case of the new form and true 

 cinereus intergradation is assumed, but is hardly less certain. 



The geographical distribution of the three races is, in the main, 

 quite distinct : y. cinereus belonging to the eastern mountain 

 districts of Mexico (from the Sierra Madre of Chihuahua to the 

 high regions of Vera Cruz), y. cinereus dorsalis to the moun- 

 tains of New Mexico and Eastern Arizona (White Mountains and 

 Willow Springs), while y. cinereus palliatus, as I propose to 

 name the new form, belongs exclusively, so far as known, to the 

 mountains of Central and Southern Arizona (Mt. Graham, the 

 Santa Rita range., etc.), but probably extends southward along 

 the more western mountain ranges of Mexico. 



The three races may be distinguished as follows : — 



a. Outer -web of tertials and sotne of the -wing-coverts rufous. 



i. J. cinereus. Upper parts of head and neck, with rump, dark gray 

 inclining to state-color, the rump often tinged with olive; lores deep 

 black. 



2. J. cinereus palliatus. Upper parts of head and neck, with rump, 

 clear ash-gray ; lores grayish black. 



b. Outer surface of wings entirely ash-gray. 



3. J. cinereus dorsalis. Upper parts of head and neck, with rump 

 clear ash-gray, and lores grayish black, as in J. cinereus palliatus. 



The type of J. cinereus palliatus is No. 68817: U. S. Nat. 

 Mus., $ ad., Mt. Graham, Arizona, Sept. 19, 1S74; H. W. 

 Henshaw collector. 



