VIREOSYLVIA. 327 
and claw, with seven well-marked scutellz anteriorly. Outer lateral toe the 
longer, reaching beyond base of middle; claws much curved, compressed, 
) 
.| Vireosylvia olivacea.* 
acute. In the dried specimen entire basal joint of middle toe adherent to one 
and three-fourths joints of outer, and the whole basal joint of inner; the ad- 
hesion externally extending indeed a little over the second joint of middle toe.? 
VIREOSYLVIA, Bon. 
The following synopsis expresses the characters of the species of 
Vireosylvia as restricted :— 
Common CHaRaActers.—All species olive above, white or yellowish beneath. 
An ashy or brownish cap, contrasting more or less abruptly with the olive 
back. A whitish superciliary stripe extending to the nape, and a dusky one 
to and behind the eye. No light bands on the coverts. Inside of wings 
(flanks sometimes) and crissum yellowish, otherwise usually white beneath. 
A. Bill lengthened ; gape or commissure less than twice the 
distance from nostril to.end of bill. No spurious primary. 
Cap ashy, in contrast with olive green of back, edged 
with dusky, forming a faint supra-ocular’ dark 
stripe. A dusky stripe on each side of the chin. 
Superciliary stripe and cheeks, especially anterior 
to the eye, and the chin tinged with brown- 
ish-buff. Ash of head indistinctly defined, 
owing to a wash of olivaceous. Olive of 
1 In the following figures the left foot is always given, and from the outer 
side. 
2 In the fresh bird the whole of the basal joint of the inner toe is adherent 
to the first phalanx of the middle, the membrane reaching a very little above 
the distal end of the latter. The basal joint of the outer, and more than half 
of the second joint are likewise adherent to the middle toe, the membrane 
extending to the middle of the second joint. The basal joints are thus united 
into a palm, not cleft at all. The upper surfaces of this palm are covered 
with hexagonal, not quadrangular scales, arranged in a connected pavement 
in three series. When the toes are extended, the hinder reaches to a point 
intermediate between the slightly unequal lateral toes, and nearly to the 
middle of the claw of the central toe. 
