The figures are of the natural size, the upper representing the female, and the lower the male bird: the head of the former is entirely destitute of the crest which distinguishes the latter; in every other respect the resemblance is uniform. This crest, when not erected, is concealed, being nearly covered by the olive feathers around it. When erected, however, it discloses a stripe down the middle of the head of deep straw-coloured feathers, some of which are tipped with olive. The upper mandible of the bill is triangular, and much hooked, notched, and depressed; the colour is black, the perforations of the nostrils are rather large, and would be naked, were they not partially covered by numerous stiff bristles, which spring from the base of the bill and angle of the mouth; between the eye and bill a pale stripe. The plumage above is dull olive green, with a broad band of very pale yellow across the rump. Wings and their covers brown; tail and upper covers blackish; beneath, the plumage is yellowish, the chin almost white, and the breast and vent tinged with ferruginous; the two first quill feathers are progressively shorter than the third and fourth, which are equal, and longer than the others. Legs and claws short, slender, and pale. This bird would obviously belong to the second division which I had proposed in my former remarks on _Platyrhynchus_, and it is in every respect allied to _P. Ceylonensis_, _Pl._ 13. My reasons for disturbing this previous arrangement have been already given; and, until a complete investigation is made of the immense genus of Flycatchers, I concur with M. Temminck in the distribution which he has proposed; viz. the arrangement of the European species under the old genus of _Muscicapa_, and of the exotic under that of _Muscipeta_; the characters of which, however, are very imperfect: they are, indeed, at variance with this bird, which has the outer and middle toe connected only to the _first_ joint, and the inner toe cleft to the base. * * * * * Pl. 117 [Illustration] NECTARINIA cyanocephala, _Blue-headed Nectarinia._ * * * * * GENERIC CHARACTER. Nectarinia. _Illiger._ _Cuvier._ Caereba _Brisson_. _Temminck._ Certhia. Motacilla _Linn._ _Rostrum longius, gracile, acutum, sub-arcuatum, basi crassa, lata, trigona, lateribus compressis, mandibula superiore apicem juxta leviter emarginata. Nares basales, ovatae, breves, membrana nuda, in medio ovate fissa tectae. Lingua longa, bifida, apice fibroso, haud extensibilis. Remigum pennae primae tres vix pares. Cauda mediocris, emarginata, rectricibus 12, sub-paribus._