276 Descriptions of two New Birds, of the genus Tyrannula. 
dark, like the greater wing co 
lavish white. 
Length 5 _— 2 lines. Exter 
wing 24 inch ‘“ 
= ae difference as to color or size between the sexes. 
bservations.—This species will be recognized by its size, its 
erts, , and broadly edged with yel 
nt 8 inches 3 lines. Folded 
dieaer form making it the smallest of our North American Ty- 
rannule. In color it most resemb 
Les s 1’. Traillii, of Audubon, 
" but it is a much smaller bird, being x 
y three-fourths of an inch 
shorter. 7J'. T'ratllii has the breast and sides of the neck oliva- i 
ceous ; in this species light ash. 
lit is even. + 
It differs from T. pusilla Pemparing with the description € 
Swainson and Richardson as before) in having the wings more 
pointed, the second and third primaries being longest, and the 
first longer than the sixth; while in pusilla the third and fourth 
y; the tail alsoof 7. Tn 
are longest, and the first shorter than the sixth. The upper tail — 
coverts of puszi/a are uniform in color with the back ; in our spe 
cies lighter: pusilla has the front “hoary ;” in this speties dark. 
The lower parts of pusilla are pale sulphur yellow, “ approaching 
to siskin-green ;”’ in our species yellowish white: the under man- 
dible of pusilla is yellowish brown; of this species horn color. 
From the figure in the Fauna Boreali-Americana, pusilla appears 
to be a stouter bird, much deeper in color beneath and having a 
broader bill. Its smaller size and darker color above, will distin- 
guish it from 7’. Acadica, (being two-thirds of an inch shorter,) — 
which species has also longer and more pointed wings, a much | 
larger bill which is light brown beneath, and an even tail. 
This species was first observed and procured in May, 1839, 
near Carlisle, Penn. Since then numbers have been observed 
and shot on every succeeding spring. Like the preceding, (7° 
Jlaviventris,) this bird does not frequent deep forests, but is found 
among the scattering trees which border our streams. It is rath- 
er shyer than 7’. flaviventris, and does not, like that species, seek 
dense thickets. It also, most probably, goes further north to 
breed, as after the last of May it is no longer to be seen. It vis 
its us from the south in the latter part of April, Pui i rae 
its syotrasce about a week before 7. flaviventri 
