VIREOSYLVIA. é' 339 
(No. 2,034.) Similar to V. olivacea in olive of upper parts, lead colored 
cap edged with blackish, a whitish superciliary, and dusky loral stripe. 
Sides, however, more conspicuously olivace- 
ous yellow; axillars and crissum purer yel- 
low ; inner edges of quills and tail feathers 
pale, but distinctly yellowish; rest of under 
parts greenish-white. 
Third quill longest; 2d and 4th scarcely 
less ; Ist intermediate between 5th and 6th. 
(No. 2,034.) Total length, 5.50; wing, 
2.80; tail, 2.35 ; width of outer feather, .30; 
difference of lst and 3d primaries, .27, of 2d 
and 5th, .15, of 3d and 9th, .54; length of 
bill from forehead, .66, from nostril, .37, along gape, .77; tarsus, .70; middle 
toe and claw, .53; hind toe and claw, .44 (claw broken). 
/ Vireosylvia agilis. (G uatemala.) 
The ashy cap does not extend over the nape, and is rounded off 
behind, leaving the sides of occiput olive. 
A specimen from Trinidad, belonging to Mr. A. Newton, differs in. 
much brighter and deeper olive and yellow shades; the ash of cap 
extends farther back on the nape, but is rather rounded behind. 
The concealed portion of the tail feathers is almost as distinctly 
olive as the back. The wing is unusually long, measuring 2.95; the 
first quill is about equal to the fifth; the difference of shortest and 
longest quills .62. 
Another specimen (No. 8,050, from Guatemala), which may pos- 
sibly belong even to a different species, is equally bright in colora- 
tion with preceding, and the ash of cap extends still more over the 
nape, widening behind; the posterior outline almost transverse. The 
tail feathers are broader (.35) ; the wing shorter (2.75) ; the first quill 
intermediate between the fifth and sixth; the difference of longest 
and shortest quills .55. One from Ecuador, referred here, in poor 
condition, differs in some minor points. One from Buenos Ayres, 
again, is unusually large, the tail longer, the wing equal to the - 
Trinidad specimen. 
Compared with V. chivi, of the La Plata region, this species, as 
described above, is considerably larger, and in size nearer to V. olt- 
vacea; the wings are more pointed, the olive yellow and yellow of 
the sides and under parts brighter and more distinct. 
From J. olivacea it differs in the much brighter coloration of 
the under parts, and in the wing formula, as well as in inferior size. 
In many points of coloration it bears a close resemblance to V. flavo- 
viridis. It is, however, smaller and less brightly colored, and the 
olive yellow of the sides does not encroach so much on the breast. 
There is also an appreciable difference in the markings of the head, 
