176 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
Vireo huttoni stephensi Brewst. 
STEPHENS’s VIREO. 
Vireo huttoni stephensi Bevprine, Proc. U. S. Nat. Mus., VI. 1883, 347 (Victoria 
Mts.). Bryant, Proc. Calif, Acad. Sci., 2d ser., I. 1889, 307 (Victoria Mts.). 
Lower California specimens of Stephens’s Vireo have larger bills than those 
from Arizona, but I can discover no other differences. A young bird in 
juvenal plumage (No. 10,248, Santa Rita Mountains, Arizona, July 9, 1884, 
F. Stephens) differs from the adult in having the outer edges of the wing quills 
and tail feathers olive green ; the upper tail coverts tinged with olive; the 
back, nape, and crown suffused with drab ; the wing bands yellowish; and the 
under parts lighter, the middle of the abdomen and breast being nearly pure 
white. 
Autumnal birds in winter plumage, of which the Lower California collection 
contains several representatives, show a tinge of olive above and more or less 
brownish beneath, while the outer edges of the wings and tail are greenish 
olive, as with the young in juvenal plumage. The deepest colored autumnal 
specimens, however, are much paler and grayer than any of my examples of 
V. huttont. 
Mr. Belding, who was the first to detect Stephens’s Vireo in Lower California, 
gives it in his list of mountain birds as “ common above 3,000 feet altitude,” 
but ‘* not observed below this.” Mr. Frazar found it numerous among the 
pines on the Sierra de la Laguna in May and early June, but none of the 
specimens killed there showed any signs of breeding. He also met with 
it at San José del Rancho in July, although not in any numbers. During 
his second visit to La Laguna, the last week of November, two birds were 
shot and several others seen on the very summit of this mountain, and a few 
days later (on December 2) a single specimen was taken at Triunfo, indicating 
that at least a few individuals winter in the Cape Region, to the northward of 
which, on the Peninsula, this Vireo has not yet been noted. It inhabits 
southern Arizona, and is a common bird in many parts of western Mexico. 
Vireo pusillus Coves. 
Least VIREO. 
Vireo pusillus Beip1nc, Proc. U. S. Nat. Mus., V. 1883, 537 (Cape Region). Barrp, 
Brewer, and Rrpeway, Hist. N. Amer. Birds, I. 1874, 891-393, pl. 17, fig. 
14 (descr.: Cape St. Lucas). 
Vireo bellii pusillus Bryant, Proc. Calif. Acad. Sci., 2d ser., II. 1889, 808 (Cape 
Region). 
Mr. Grinnell has recently separated the Least Vireo of California from that 
of ** Arizona and southern Lower California,’? under the name Vireo pusillus 
