iSgo.] 



Mearns. Descriptions of Nexv Birds from Arizona. 



249 



tana, from New Mexico, has the frontal stripe quite as broad as 

 in average Minnesota specimens. In Western and Southern birds 

 there is a slight average increase in the intensity of the yellow in 

 males. Season appears to exert but little influence upon the 

 plumage, though the yellowest males were taken in spring, and 

 Western females average browner in winter, with an increase of 

 the olive vellow in autumn. The brownest females of C. vesper- 

 tina montana come from the extreme localities of Walla Walla 

 and Mirador, and were taken in January and June, respectively. 

 The variation in size in the subspecies montana. throughout its 

 range, is almost inappreciable, measurements of specimens from 

 the northwestern United States averaging almost exactly the 

 same as those from southern Mexico, while those from interven- 

 ing localities show only slight individual variations. 



MEASUREMENTS.* 



Length . . 

 Expanse . . 

 Wing.. . . 

 Tail .... 

 Oilmen 



(chord). . 

 Bill from 



nostril . . 

 Gape . . . 

 Height of 



billatbase 

 Width of 



billatbase 

 Tarsus . . 

 Middle toe 

 and claw . . 

 Middle claw . 

 Hallux with 



its claws. . 



' Coccothraustes vespcrtina montana 

 (from Arizona). 



3 MALES 



S FEMALES 



204 



357 



.6.5 



22 



'7 



15 



200 



340 



112 



70 



'4-5 



20.5 



2UO 



343 

 112 



20.6 

 '5-7 



14-5 

 21.3 



24.2 

 7-3 



16 1 16 



204 

 348 

 US 



21.5 



16.5 

 23 



1 5 -5 



'5-2 

 22 



26 

 8-5 



'95 

 339 



19-5 



'5 



21 



14-5 



'4 



23 -5 

 7- 



'5-9 



Melanerpes formicivorus aculeatus subsp. nov. 



A comparison of more than fifty x\rizona specimens of this 

 species with the series of Melanerpes fortnicivorus bairdi from 



* In millimetres ; taken from specimens in the flesh, by the author. 



