56 On the Avifauna of Bucaramanga. 



margin of the wing-feathers are also a uniform yellowish 

 white. The jflanks are greyish olivaeeouSj variegated with 

 whitish, and on the inner flanks under the wing there is a 

 bundle of silky-white feathers of a fluffy appearance. The 

 under tail-coverts are yellowish white, marked with indistinct 

 dusky spots on each side of the feather. 



The wings are a blackish brown, with very indistinct mar- 

 gins of greyish olive to the secondaries and the middle portion 

 of the outer webs of the primaries. The smallest wing- 

 coverts are dark broAvn, margined with the colour of the 

 back, the medium-sized and the longest coverts more blackish 

 brown, tipped broadly and distinctly with white spots (these 

 forming two conspicuous and well-marked white Aving-bands) . 

 The least tertiaries also show inconspicuous narrow white 

 margins to their tips behind. 



The tail-feathers are of the same cinereous colour as the 

 back, with blackish shafts. The three outer rectrices on each 

 side show sharp and conspicuous white margins to the inner 

 webs from nearly the base to the tip. Upper mandible 

 blackish brown ; the under mandible whitish, obscured with 

 brownish on the side of the base and on the tip. Legs 

 blackish plumbeous, claws clear yellowish white. 



The young bird differs from the old one in having all the fea- 

 thers of the breast down nearly to the belly and of the jugulum 

 margined with greyish black ; these margins are more con- 

 spicuous on the sides of the feather than on the tip, but give 

 to these parts of the body a somewhat scaly appearance. The 

 white superciliary stripe is not nearly so broad as in the old 

 bird, and much obscured by blackish margins to the feathers. 

 The feathers on the forehead show somewhat lighter centres, 

 but there are no linear shaft-stripes ; these feathers are also 

 not nearly so stifl" and pointed as in the adult. 



On the neck and upper part of the back the white striations 

 are much more consjiicuous, being broader and more generally 

 dispersed. The white wing-bands are not so conspicuous, 

 being narrower and more soiled with rusty yellowish. The 

 conspicuous white margins to the inner webs of the tail- 

 feathers arc altogether wanting. 



