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Show BIRDS. 67 is common in La Plata, the Falkland Islands, and Tierra del Fuego; in the latter it frequents the higher parts of the mountains, or those exposed to the western gales, which are free from forests, for it is a bird that exclusively lives in open countries and on the ground. I believe it is not found in Chile; nor is it common on the coast of Patagonia. This species in its habits is very different from the three following clo8ely allied ones, since the latter never, or most rarely, leave the sea beach, whilst this bird, excepting by chance, is never seen there, but always in the interior country. Nevertheless with this marked difference in habits, (there are several other points beside that of the station frequented), if the preserved skins of 0. parvulus and 0. vulgaris were placed in the hands of any one, even perhaps of a practised ornithologist, he would at first hesitate to consider them distinct, although upon closer examination he would find many points of difference,- of which the much greater strength of the feet and the greater length of the tarsus are conspicuous in those species, which live amongst the stones on the sea beach. 2. 0PETIORHYNCHUS PATAGONicus. G. R. Gmy. Patagonian Warbler, Lath. Syn. iv. p. 434. Motacilla Pntagonica, Gmel. Motacilla Gracula, Forat. Draw. No. lGO. Sylvia Patagonica, Latlt. Index, ii. 517. Furnarius Lessonii, Dumont. ---Chilensis, Less. Voy. do Ia Coqu. i. p. 671, n. Tr. d'On1ith. p. 307, pl. 75, f. I. Opctiorhynchus rupestris, Kittl. Mem. de l'Acad. St. Petersb. i. p. 188, pl. viii. Uppucerthia rupestris, D'Orb. ~· Lafr. Mag. de Zool. 1838, p. 21. This bird is extremely common on the sea shore of all the bays and channels of Tierra del Fuego; on the western coast it is replaced in Northern Chile by the 0. nig.,-qfumosus, and in the Falkland Islands by the 0. antarcticus. As the habits of this species and those just named are quite similar, I shall describe them all together under the head of 0. nigrofiemosus. A specimen of 0. Patagonicus from Chiloe has a bill rather more than two-tenths of an inch longer than in those from Tierra del Fuego ; but as no other difference can be perceived, I cannot allow that this is a specific character any more than in the case of the U ppucertltia. 3. 0PETIORHYNCIIus ANTARCTicus. G. R. Gray. Certhia antarctica, Gam. Ann. des Sc. Nat. J 826. Furnarius fuliginosus, Leas. Voy. de Ia Coqu. Zool. i. p. 670. Patagonian Warbler, Lath.~ in Dixon's Voy. App. No. I, 359 and pl. This species inhabits the Falkland Islands. My specimens were procured at |