PASSERES VIREONIDAE V. SOL1TARIDS VAR. CASSINI. 223 



from its northern breeding ground, it appears to follow the mountain ranges, 

 and to confine itself to the pine region. During the latter part of Septem- 

 ber, I found the species occurring quite numerously at Mount Graham, 

 where it was seen only among the lofty pines, usually accompanying other 

 birds, as the Audubon's Warbler and Nuthatches. It could scarcely be said 

 to be in song yet ; as it moved about from branch to branch, it occasionally 

 paused to give utterance to a few strains, which, though broken and 

 detached, were sufficient to bring to mind the beautiful melody to be heard 

 from this bird in the vernal season in variety and richness of notes not 

 surpassed by the song of any of the family. 



VIREO SOLITAR1US (Wils.), var. (?) OASSINI, Bd. 

 Cassin's Vireo. 



Vireo cassinii, XANTUS, Proc. Acatl. Nat. Sci. Phila,, 1858, 117. BD., Birds N. A., 185S, 

 340, pi. 78, f. 1 (var. ?). XANTUS, Proc. Acad. Nat. Sci. Phila., 1859, 191 

 (Fort Tejon, Oal.). 



Lanivireo solitarius var. cassini, BD., BREW., & RIDG., N. A. Birds, i, 1874, 377. 



Vireo solitarius var. cassinii, HENSHAW, Rep. Orn. Specs., 1873, Wheeler's Exped., 

 1874, 105. 



Since the discovery of this bird at Fort Tejon, Gal., it has been met 

 with by but few observers, and nothing whatever appears to be known of 

 its summer home or of its habits ; at least nothing to show that these are in 

 any way peculiar or distinctive from the Solitary Vireo, which it so closely 

 resembles in appearance. Mr. Ridgway secured two specimens in the West 

 Humboldt Mountains in September. Seemingly, it occurs in Arizona only 

 as a migrant, though possibly it may winter in the southern portion. In 1873, 

 it was observed by both Dr. C. G. Newberry and myself ; the earliest date 



