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Show 76 DR. H. B U R M E I S T E R O N C O N U R U S HILARIS [Jan. 15, These three skins enable me to give the following full description. Beginning with the size, I find that the living specimen I examined must have been very young, and by no means fully adult, as the three skins now under m y inspection are all larger. The two largest measure from the front to the tip of the tail 13 inches, and the smaller specimen (from Salta) 12 inches, tail 6| inches, and the wings 7|-7|. The predominating colour is pure green, somewhat darker on the upperside, more especially on the head and neck, but clearer on the underside ; the wing- and tail-feathers are of the same colour outside, both with black shafts, and the former with a blackish interior margin inclining to blue. The inside of these above-mentioned feathers is yellowish grey, darker on the margins, and the yellow colour clearer on the tail-feathers towards the base, which in some specimens are of an orange appearance. There is no red on these feathers in any of the three specimens; but it is possible that when alive it may have had this colour, if not very distinct, at least visible. I find in one of these specimens a red spot on two of the tail-coverts, which are generally completely green. The red colour is regular only on the front of the head, beginning from the base of the upper mandible, extending up to and behind the eye; but a small space of green appears over the middle of the eye, and descends on the cheeks to the ear and the under mandible, with some green feathers near the angle of the mouth. At first these red feathers are very small and of a dark red-brown, and thence the others become blood-red. Besides this regular frontal patch there are other red feathers on other parts of the body, but without any constant regularity in different specimens of the same species. I find in m y three examples great difference in the distribution of these red feathers. There generally seem to exist some red feathers on the neck, front of the throat, and breast; also there is always a circle of red feathers at the end of the tibia. As to the habits and manner of living of this bird, I cannot add any thing to what I have already said at the commencement of this communication. It lives only in the northern mountainous districts of the Argentine Republic, never coming to the plains of the Pampas. I take this occasion to correct some mistakes made by Dr. Finsch in his work, respecting m y previous communications on different species of Parrots of this country and of Brazil. The author says (vol. i. p. 174) that he knowns nothing of the spines on the sides of the tongue of the Arcs, mentioned by me in my work on the Animals of Brazil. In that work (vol. ii. p. 152) I described the tip of the tongue of this genus as like a stalk in iorm (stdngelfbrmig). But this German word was a mistake of my printers. I wrote " stdmpelformig " (shaped like a pestle), comparing the thick fleshy tongue of the Arce (although not entirely |