_Rostrum mediocre, capite plerumque longius, gracile, curvatum, acuminatum, attenuatum, ad basin altius quam latius, lateribus compressis; culmine carinato. Mandibula superior ad apicem emarginata; inferior lateribus compressis. Nares concavae ad medium rostri porrectae, membrana tectae, inter rictum et apicem longo fissu aperientes. Lingua longa, extensibilis, fibris cartilaginosis terminata. Pedes simplices, digito exteriore connexo, halluce pervalido._ Obs. _Cauda rectricibus_ 12, _remigibus_ 1 _et_ 2 _spuriis; rostri margine aliquando subtilissime dentato._ Typus Genericus _Certhia Novae Hollandiae_ Lath. Bill moderate, generally somewhat longer than the head, slender, curved, pointed and acuminated, the base higher than broad, the sides compressed, the top carinated; upper mandible notched at the tip, the under mandible laterally compressed. Nostrils concave, near half the length of the bill, covered by a membrane, opening by a long slit midway between the gape and tip. Tongue long, extensible, terminated by cartilaginous fibres. Feet simple; outer fore-toe connected; hind-toe very strong. Obs. Tail-feathers twelve, first and second quills spurious; margin of the bill sometimes minutely toothed. Generic Type _New Holland Creeper_ Lath., &c. * * * * * SPECIFIC CHARACTER. _M. olivaceo fusca; vertice corporeque subtus flavescentibus; temporibus auribusque nigris; gula et pennis elongatis pone aures flavis._ Olive-brown: crown of the head and body beneath yellowish; temples and ear-feathers black; throat and lengthened feathers behind the ears yellow. Muscicapa auricomis. M. olivacea, vertice corpore subtus maculaque aurium flavis, per oculos striga alba. _Lath. Ind. Orn. vol._ 2. _Suppl._ xlix. 1. _Gen. Zool._ 10. 2. _p._ 354. Yellow-tufted Flycatcher. _Lath. Suppl._ 2. 215. _no._ 4. _Gen. Zool._ 10. 2. 354. * * * * * The Yellow-tufted Honeysucker, although described by Latham, has hitherto remained unfigured; and I therefore select it as an excellent example of a tribe of birds which I think are peculiar to Australasia, and which seem to hold the same situation among the birds of that vast country as the Humming-birds occupy in South America, and the Sun-birds (_Cinnyris_, Cuvier) in Africa and India; all of which more or less derive their sustenance from the nectar of flowers, and which they extract on the wing by means of their long tubular tongues.