BIRDS—TYRANNINAE—EMPIDONAX HAMMONDII. 
199 
That this species is not the T. pusilla of Swainson is sufficiently evident from the fact that 
the hands on the wing in the latter are said to he grayish white, the throat ash gray, a whitish 
ring round the eye, &c.; all these parts in flavivenlris being strongly tinged with yellowish. 
The proportions of the quills, too, are different. 
I have quoted Tyrannula pusilla of Reinhardt and Gloger, a species captured in 1853 in the 
Godthaab district of Greenland, as coming much nearer to the present species than to pusilla 
of Swainson. 
Catal. 
No. 
Sex. 
Locality. 
/ 
When collected. 
Whence obtained. 
Original 
No. 
Length. 
Extent. 
Wing. 
Remarks. 
]Q51 
An*. 4, 1831 
2339 
O 
May 24, 1845 
985 
A 
May 18, 1843 
5.16 
8.83 
2.83 
2972 
Q 
May 18, 1846 
5.50 
8.25 
2.50 
2352 
A 
May 26, 1845 
.do. 
5.50 
9. 
2.75 
2351 
O 
5.41 
8.08 
2.50 
2350 
V 
A 
5.54 
8.58 
2.75 
2428 
Sept. 4, 1845 
5.25 
8.50 
2.58 
2302 
9 
.do ... . 
5.25 
8. 
2.58 
May 19, 1855 
5920 
5.60 
8.50 
7243 
July 4, 1854 
84 
5.50 
8.50 
7099 
32613 
EMPIDONAX HAMMONDII, Baird. 
Tyrannula hammondii, De Vesey, Pr. A. N. Sc. May, 1858. 
Sp. Ch.—T ail moderately forked ; the feathers acutely pointed. Third quill longest; second and then fourth a little shorter. 
First much shorter than fifth, a little longer than sixth. Bill very slender, dark brown. Above dark olive green, consider¬ 
ably darker on the head. Breast and sides of the body light olive green, the throat grayish white; the rest of under 
parts bright sulphur yellow. A whitish ring round the eye. Wings and tail dark brown ; the former with two olivaceous gray 
bands across the coverts; the latter with the outer edge a little paler than elsewhere, but not at all white. Length, 5.50; 
wing, 2.80 ; tail, 2.50 ; taisus, .67. 
Hab .—Vicinity of Fort Tejon to Los Angeles. 
In this species the olive green on the sides is scarcely distinguishable from that on the back, 
although becoming more yellow on the middle of the breast. There is a decided ashy shade on 
the whole head. The only light edging to the quills is seen on the terminal half of the 
secondaries. The upper mandible and feet are black; the tip of the lower (and in one specimen 
the whole) dark brown. The fork of the tail measures a quarter of an inch in depth ; the 
longest quill exceeds the first by .40. 
This species is at once distinguishable from all the North American Tyrannulas, except 
obscurus, by the extreme narrowness of the bill. This is only .25 of an inch wide at the 
posterior angle of the mouth, and only .19 at the nostrils. Its colors above are those of 
acadicus, while the general effect is much more that of flavivenlris, although less brightly 
olive. The throat is grayish, not of the same yellow with the belly ; the ring round the eye 
white, not yellow ; the olive of the breast much more continuous and distinct; the bands on 
the wings dull grayish instead of clear greenish yellow. The tail, instead of being nearly 
even, is quite deeply forked. The bill is scarcely half as wide, and brownish, not yellow, 
beneath. The tarsus has the same peculiar scutellation. 
The differences from T , obscurus are less easily expressed. It is, however, considerably 
