BIEDS LANIIDAE — VIREO ATRICAPILLUS. 
337 
VIREO BELLI, Aud. 
Bell's Vireo. 
Vireo belli, Aud. Birds Amer. (8vo.) VII, 1844, 333 ; pi. 485, (Missouri.)— Cassin, Pr. A. N. Sc. V, Feb. 1851, 150. 
Sp. Ch.— Similar to V. gilvus, but smaller. Olive green above, tinged with ashy on the top and sides of head. A short line 
from the bill over the eye, and region around lower eyelid white ; lores dusky. Beneath yellowish white ; on the sides of body and 
posteriorly, sulphur yellow. Two faint bars of whitish across the wing coverts ; inner tertiaries edged broadly with whitish. 
Third quill longest ; the rest successively shorter, except the second, which is a little shorter than the seventh. Spurious 
primary about two-fifths the second, and more than one-third of the third. Length about 4.25 inches; wing, 2.25. 
Hah— Missouri river and eastern Texas. 
In this diminutive species the bill is shaped much as in V. gilvus. The spurious primary is 
large, its exposed portion about two-fifths that of the second primary. The third primary is 
longest ; then the fourth, fifth, and sixth ; the second is a little longer than the seventh, and 
about .24 of an inch shorter than the third. The tail is slightly emarginate and rounded ; the 
feathers are quite narrow. 
The sulphur yellow is strongest about the tibia and on the under tail coverts. The whitish 
bands are along the edges of the greater and middle coverts. The outer web of the first tail 
feather is, however, not lighter than the rest. 
Specimens vary somewhat, the more southern ones being rather smaller. Sometimes there is 
a faint tinge of brown on the breast, and of lilac in the white of the belly. There is a tinge 
of yellow on almost all the under parts. The third quill is sometimes a little shorter than the 
fourth. This species is a miniature of V. gilvus, but may be readily distinguished by its smaller 
size, by the much larger spurious primary, the exposed portion of which is two-fifths of that of 
the second quill, instead of one-fourth. The sides of the belly and under tail coverts are 
bright, though pale, sulphur yellow, instead of faint sulphury white. The white bands on the 
wing and that on the tertiaries are absolutely wanting in V. gilvus. The external edging to the 
quills and tail feathers is of a brighter olive green. 
List of specimens. 
Catal. 
No. 
Sex. 
Locality. 
When col- 
lected. 
Whence obtained. 
Orig. 
No. 
Collected by— 
Length. 
Stretch 
ofwings 
Wing. 
Remarks. 
6S16 
6817 
4979 
8197 
8196 
8187 
1926 
3 
Col. J. D. Graham. 
J. IT. Clark... 
4,50 
7. 
2. 
9 
3 
3 
Nemalia river, K. T.. 
July 16, 1857 
W. M. Magraw. .. 
133 
132 
123 
Dr. Cooper. .. 
do 
do 
J. J. Audubon 
4.90 
5.00 
5.00 
GVJO 
7.50 
7.00 
2.38 
2 50 
Shawnee Mission, K.T. 
Fort Union, Nebraska. 
July 4. 1857 
S. F. Baird 
VIREO ATRICAPILLUS, Woodh. 
li lack-headed Flycatcher. 
Vireo atricapillus, Woodhouse, Pr. A. N. Sc. VI, Ap. 1852, 60, San Pedro, Tex. — Ib. Sitgreave's Report on Zufii, 
1853, 75 ; pi. i, Birds.— Cassin, 111. I, No. 5, 1854, 153 ; pi. xxiv. 
Sp. Ch. — Fourth and fifth quills longest ; second little longer than secondaries. Head and neck above and on the sides black. 
Back olive green, lighter towards the tail. Beneath white, the sides of body greenish yellow. A white ring round the eye 
interrupted by the black of the head above, and extending in a broad line to the base of the upper mandible. Two bands of 
greenish white across the wing coverts. Bill black. Length, 4.75 ; wing, 2.12. 
Hab.— Devil's river, Texas. 
43 b 
