o22 OperHoLsER, Notes on N. A. Birds. II. eats 
Vireo bellii arizone Ridgway. 
The Arizona form of Vireo bellit was originally characterized by 
Mr. Ridgway in 19031 from a type collected at Tucson, Arizona. 
It has commonly been considered as inseparable from Vireo bellii 
pusillus Coues, but by a study of our Texas and other material, 
some of this additional to that available to Mr. Ridgway, the race 
is shown to be readily distinguishable from both Vireo bellit pusillus 
of California as well as from Vireo bellii medius of central western 
Texas. It differs from the former in having the upper parts 
decidedly more greenish (less grayish), and the lower parts less 
whitish, the sides and flanks much more strongly tinged with olive 
grayish and more washed with yellowish. The wing and tail 
average somewhat shorter, but these differences are not of much 
value in identifying specimens. From Vireo bellii medius Ober- 
holser it may readily be distinguished by its decidedly longer tail 
and much paler and more grayish coloration, both above and below. 
The geographic distribution of Vireo bellii arizone extends from 
the extreme western portion of central western Texas west to south- 
ern Arizona, and south to the Mexican states of Sonora, Sinaloa, 
and Chihuahua. 
Beolophus inornatus murinus Ridgway. 
This race of Beolophus inornatus was first made known by Mr. 
Ridgway in the Proceedings of the Biological Society of Washing- 
ton, Volume XVI, June 25, 1903, page 109, as Beolophus inornatus 
murinus, from a specimen taken in the Nachoguero Valley, northern 
Lower California. It was later more fully described by him 2; 
it was also recognized some years later by Dr. Joseph Grinnell and 
Mr. H. S. Swarth;? and subsequently, though without comment, 
by Doctor Grinnell in Pacifie Coast Avifauna No. 11, 1915, p. 163; 
but it seems to have been otherwise generally ignored by ornitho- 
1 Vireo bellii arizone Ridgway, Proc. Biol. Soc. Washington, XVI, September 30, 1903, 
p. 108. 
2 Bull. U.S. Nat. Mus., No. 50, part III, 1904, pp. 389-390. 
3 Univ. Calif. Publ. Zool., X, No. 10, October 13, 1913, p. 310. 
