Our figure is from a specimen brought from Demerara by C. Edmonston, Esq.; another is in the possession of A. MacLeay, Esq. Though rare in our cabinets, M. Le Vaillant says it is common in Cayenne. He has given a beautiful figure of the female, which is entirely green. Total length six inches. Plumage above entirely green, beneath paler and inclining to yellow; just under the lower mandible is a small snuff-coloured spot, and a very narrow line of the same in front just above the nostrils; the quills dark-green, the greater ones on their outside base are blue, with which the head is also tinged. The spurious wings are entirely of a rich and clear orange. Inner wing-covers green. Quills inside greenish-blue, except on each side the shafts, where there is a line of black. Tail short, cuneated, hardly projecting an inch beyond the wings, both above and below green: the interior margin dirty-yellow, the feathers pointed. Bill and legs flesh-colour. * * * * * Pl. 2 [Illustration] SITTA frontalis. _Blue Nuthatch._ * * * * * GENERIC CHARACTER. _Rostrum rectissimum, acutum, compressum; utroque mandibulo ad apicem aeque inclinato; apice integro cuneo compresso simili. Nares basales, ovales, apertae, plumis setaceis incumbentibus extrinsecus tectae. Pedes tribus digitis anticis; uno postico; digitus interior minimus; exterior ad basin medio connexus; hallux productus validus. Ungues compressissimi; antici subaequales; posticus maximus. Cauda brevis, rectricibus duodecim subaequalibus._ Typus Genericus _S. Europaea_. Bill very straight, sharp-pointed, compressed; both mandibles equally inclining to the tip, which is entire, and resembles a compressed wedge. Nostrils basal, oval, open, covered externally with incumbent setaceous feathers. Feet with three toes forward and one backward; inner toe very small; outer toe connected to the middle at its base; hind toe lengthened, strong. Claws much compressed; anterior nearly equal, posterior largest. Tail short, of twelve nearly equal feathers. Generic Type _Sitta Europaea_. * * * * * SPECIFIC CHARACTER. _S. supra caerulea; supercilio, fronte, et remigibus lateralibus in medio nigris; subtus cinereo-fusca, auribus lilacinis, mento albo._ Nuthatch, above blue: line above the eye, front, and middle of the lateral tail-feathers black; beneath cinereous brown, ears lilac, chin white. ... * * * * *