VIEEOSYLVIA. 



327 



and olaw, with seven well-marked sontellse anteriorly. Outer lateral toe the 

 longer, reaching beyond base of middle ; claws much curved, compressed, 



40089 



Vireosylvia olivncea.- , 



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.'' 



ViREOSYiiViA, Bon. 



The following synopsis expresses the characters of the species of 

 Vireosylvia as restricted : — 



Common Chakacteks. — 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 orissum 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 sidfe 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 



' 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 

 midile of the claw of the central toe. 



