BIRDS SYLVICOLIDAE — SEIURUS 
259 
peregrina of Wilson, as intimated by Bonaparte, since the former is stated to have the upper 
parts, including the rump, pale blue. This is never the case in the latter species, where the 
rump is always green. The absence of white bands on the wing shows that it is not S. coerulea 
of Wilson. The Helinaia brevipennis of Giraud is quite similar, but has a much shorter wing. 
List of specimens. 
Catal. 
No. 
Sex. 
Locality. 
When collected. 
Whence obtained. 
Collected by — 
Length. 
Stretch 
of wings. 
Wing. 
752 
412 
790 
7399 
1879 
9 
9 
3 
Carlisle, Pa 
Sept. 23, 1842 
May 21, 1841 
Oct. 10, 1842 
S. F. Baird 
4.50 
4. 75 
4. 83 
7.25 
7. 50 
7. 75 
2. 50 
do 
do 
Cleveland, Ohio 
do 
2. 50 
Cairo, Illinois 
April 22, 1842 
1843 
N. W. University.. 
S. F. Baird 
Robt. Kennicott 
S 
Fort Union, Neb 
Section Sylvicoleae. 
Bill distinctly notched ; rictal bristles short or small, or wanting. Hind toe short, equal to the lateral ; the claw as long as 
its digit. First quill scarcely shorter than longest. 
The following genera compose this section : 
Seiurus. — Legs stout, elongated ; tarsi longer than the skull. Colors olive above ; streaked 
beneath. Tail feathers unspotted. Legs yellow. 
Dendroica. — Legs slender ; tarsi scarcely equal to the skull. Bill variable. Colors of body 
brilliant and varied. Tail feathers always with a white patch on the inner web. Legs usually 
dusky. 
SEIURUS, Swainson. 
Seiurus, Swainson, Zool. Jour. Ill, 1827, 171. (Sufficiently distinct from Seiurus.) Type Motacilla aurocapilla, L. 
Henicocichla, Gray, List of Genera, 1840. 
Ch. — Bill rather sylvicoline, compressed, with a distinct notch. Gonys ascending. Rictal bristles very short. Wings mod- 
erate, about three-quarters of an inch longer than the tail ; first quill scarcely shorter than the second. Tail slightly rounded ; 
feathers acuminate. Tarsi about as long as the skull, considerably exceeding the middle toe. Under tail coverts reaching 
within about half an inch of the end of the tail. Color above olivaceous ; beneath whitish, thickly streaked on the breast and 
sides. Wings and tail immaculate. 
This genus is decidedly sylvicoline in general appearance, although the spots on the breast 
resemble somewhat those of the thrushes. The three species may be grouped as follows : 
A. Middle of crown brownish orange, bordered by blackish. No white superciliary 
streak S. aurocapillus. 
B. Crown like the back. A well defined superciliary light stripe. 
Thickly streaked beneath, including crissum. Ground color and superciliary 
stripe yellowish. Bill small S. noveboracensis. 
Sparsely streaked beneath ; throat and crissum immaculate. Ground color and 
superciliary stripe white. Bill very large S. ludovicianus. 
