340 U. S. P. R. R EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 
VIREO SOLITARIUS, Vieillot. 
Blue-headed Flycatcher. 
Muscicapa solitaria, Wilson, Am. Orn. II, 1810, 143; pi. 17, f. 6. 
Vireo solitarius, Vieill. Nouv. Diet. 1817.— Aud. Orn. Biog. 1, 1831, 147 : V, 1839, 432 ; pi. 23.— Ib. Syn. 1839.— 
Ib. Birds Amer. IV, 1842, 144 ; pi. 239.— Nutt. Man. I, 1832,305. 
Sp. Ch. — Spurious primary very small, not one fourth the second, which is longer than the sixth. Top and sides of the head 
and upper part of neck dark bluish ash ; rest of upper parts clear olive green. A white ring round the eye, interrupted in the 
anterior canthus by a dusky lore, but the white color extending above this spot to the base of the bill. Under parts white ; the 
sides under the wings greenish yellow. Two bands on the wing coverts, with the edges of the secondaries, greenish white. 
Outer tail feather with its edge all round, including the whole outer web, whitish. Length about 5| inches ; wing, 2.40. 
Hab. — United States from Atlantic to the north Pacific, (Washington Territory only?) 
In this species the bill is short, broad, and much curved above. The spurious quill is very- 
short and narrow ; the exposed portion less than half an inch ; less than half the second quill 
(both measured from the carpal joint) by .30 of an inch. The third quill is longest ; the fourth 
very little shorter ; the second about .30 of an inch shorter than the third and considerably 
shorter than the fifth ? but much longer than the secondary quills. 
The white rings round the eye are not continuous anteriorly ; the extensions of the upper 
portions to the base of the bill are separated on the forehead by a very narrow interval. The 
whitish margin to the quills is seen only on the two innermost feathers. The bands on 
the wing cross the ends of the greater and middle coverts. The wing and tail feathers, except 
as described, are margined with the color of the back. The back is sometimes tinged with 
ashy. The under tail coverts are tinged with sulphur yellow. The feathers on the sides of the 
body are yellow towards the base ; the tips olive green ; lighter than the back. 
List of sj)ecimens. 
Catal. 
No. 
Sex. 
Locality. 
When col- 
lected. 
Where obtained. 
Orig. 
No. 
Collected by— 
Length. 
Stretch 
llwillL's. 
Wing. 
Kemarks. 
741 
303 
784 
929 
300 
4727 
4728 
5916 
6819 
6824 
6821 
6822 
6823 
Sept. 20,1842 
April 22,1841 
Oct. 7,1842 
April 28, 1843 
April 21,1841 
s 
do 
d ° 
5.50 
5.41 
5.41 
9.25 
9.00 
9.00 
"q 
3 
do 
2.41 
Mouth of Vermilion..., 
May 6, 
May 5, 
May, 1855 
May 3,18:6 
5.50 
5.25 
5.75 
9.00 
9.00 
9.00 
3.12 
Ft. Steilaeoom, W. T... 
Dr. Suckley 
357 
126 
9 
S 
S 
May 13,1856 
May 30,1856 
382 
358 
5.50 
5.12 
9.00 
8.25 
3.00 
VIREO CASSINII, De Vesey. 
C'assiu's Vireo. 
Vireo cassinii, De Vesey, Pr. A. N. Sc. Phila. May, 1858. 
Sp. Ch. — Third and fourth quills nearly equal, fifth shorter, second longer than seventh. Spurious primary very narrow, 
falcate acute ; less than one-third the second quill, and a little more than one-fourth the third. Above, including edges of wing 
and tail feathers, clear olive green, becoming dusky ashy on the top and sides of head. Beneath fulvous white, tinged with 
ill-defined olive green on the sides, (scarcely on the crissum.) Two broad bands on the wing coverts and the outer edges of 
the innermost secondaries greenish white ; the outer edge of outer tail feather, with a broad ring round the eye, extending to a 
rontal band, dull white. Length about 5 inches ; wing, 2.75 ; tail, 2.30. Hab. — Fort Tejon, Cal. 
