358 REVIEW OF AMERICAN BIRDS. [PART I. 
region and a narrow space around eye dull yellowish, in faint contrast to the 
olive of head. Bill horn color above, paler below; legs dusky. 
(No. 3,725.) Total length, 4.70; wing, 2.40; tail, 2.05; difference between 
10th and longest quills, .43; exposed portion of Ist primary, .72, of 2d, 1.52» 
of longest, 4th and 5th (measured from exposed base of Ist primary), 1.90; 
length of bill from forehead, .45, from nostril, .29, along gape, .60; tarsus, 
.72; middle toe and claw, .50, claw alone, .16; hind toe and claw, .45, claw 
alone, .22. 
The description just given is based upon the type specimen, pro- 
bably in winter plumage. Spring specimens do not vary materially 
except in greater purity of white edgings of the feathers. Two 
Mexican specimens are rather larger, the wing measuring 2.50, the 
tail 2.30. No other differences are appreciable. In general the first 
primary is about half the second, sometimes rather less. 
This species is readily distinguished from other Vireos, excepting 
V. modestus, which it greatly resembles in the small bill, form, 
coloration, and size; nor indeed is it easy to distinguish them. In 
modestus, however, the first quill is usually more than half the 
second, not less; the wing shorter, and less pointed ; the tail longer. 
The upper parts are more uniform, not much brighter towards rump 
and tail. The quite distinct circum-ocular light ring of huttoni is 
scarcely if at all appreciable. The wide separation geographically 
is of much importance. 
Smith- |Collec-} Sex When 
sonian| tor’s | and Locality. Collected Received from Collected by 
No. No. | Age. " 
39,486 44 .. | San Francisco, Cal. | Spring,’ 65. | Col. Bulkley. E. J. Lorquieu. 
12,903 | 103 .. | Napa Valley, Cal. oles ColA. J. Graysons |. elissente 
17,769 | 649 .. | California. ey Jas; sHepburn. 0 |) Wl nceen 
3,725 AS .. | Monterey, Cal. June, 1847.9). We Button i) ieee 
3,724 oe os pt ‘ ASE MUR tobe em dese 2 
3,973 Se gd | Monterey, Mex. she Lt: DUN Couch. Age, acteeae 
29,707 he .. | La Parada, W. Mex.| Jan. 1861. A. Sallé. Boucard. 
ai 2566} 9 ts Feb. 1861. Cab. Dr. Sclater. Sallé. 
(3,725.) Type. (3,973.) ‘‘ Eyes dark brown.” 
Vireo beliii. 
Vireo bellii, Aup. Birds Am. VII, 1844, 333, pl. 485 (Missouri River).— 
Cassin, Pr. A. N. Se. Phila. 1851, 150.—Bairp, Birds N. Am. 1858, 
337.—ScuiatTerR, Catal. 1861, 42, no. 258.—Bon. Consp. 1850, 330. 
Hab. United States, from Missouri River to base of Rocky Mountains. 
(No. 1,926.) Above olive green, brightest on the rump ; tinged anteriorly with 
ashy; the top and sides of head ashy, in faint contrast. A line from nostrils 
to eye (scarcely beyond it), and eyelids very pale yellowish-white; lores 
dusky. Under parts, including inner wing, coverts and edge of wing creamy 
