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Show 374 MESSRS. SCLATER AND SALVIN ON [Apr. 4, Baird, B. of N. Am. p. 770 (1858) (Texas) ; Cassin, Pr. Ac. Phil. 1860, p. 197(R. Truando) ; Scl. P. Z. S. 1858, p. 360 ; Scl. & Salv. Ibis, 1859, p. 231 ; Taylor, Ibis, 1860, p. 315 (Lake Yojoa) ; Scl. & Salv. P. Z.S. 1864, pp. 299 (partim) & 372 (Panama), et Nomencl. p. 129; Lawr. Ann. Lye. N. Y. viii. p. 13 (Panama), et ix. p. 143 (Costa Rica); Mem. Bost. Soc. N . H. ii. p. 313 (Mazatlan); Salv. Ibis, 1865, p. 193. Capitis lateribus et gutture cinereis, hoc albicantiore, colli postici linea mediali brunnescenti-nigra ; pileo (versus nucham obscuriore), collo inferiore et corpore toto antico cum dorso medio et scapularibus late castaneo-brunneis, pectore paullo dilutiore dorso postico, ventre toto et cauda nigris, ventre imo et tibiis albo variegatis, crisso fere albo ; alis nigris, tectricibus alarum minoribus internis ochracescentibus, mediis canis, externis albis remigibus (extimo excepto) in pogonio externo et remigum tectricibus lactescenti-albidis; rostro rubro, ungue nigro; pedibus flavis : long, tota 16*0, ala 8*5, cauda 2*8, tarsi 2*0, dig. med. cum ungue 2*6, rostri a rictu 2 0 (Descr. maris ex Panama in Mus. S. & G.). Hab. Mexico (Grayson) ; Guatemala (Salvin) ; Honduras (Taylor) ; Costa Rica (Arce) ; Panama (M'Leannan). Latham's description of his Anas autummalis was based upon Edwards's plate 194 ; and upon reference to this figure we feel no doubt that a specimen of the Central-American form of this Duck was the subject of Edwards's drawing. Moreover Edwards says, in the text of his work, that his specimen was brought from the West Indies. The birds described by Baird from the Rio Grande, on the Texan frontier, evidently agree with Central-American examples ; but Baird seems to have had specimens of the South-American form also before him when writiug his notes on this species in the ' Birds of North America.' He attributes the greyness of the lower neck aud breast in a South-American specimen to greater maturity-a view which can hardly be maintained, seeing that this peculiarity is found, so far as our experience goes, only in examples from the southern part of America. In Central America this species is only found in the hottest part of the country and in the lagoons near the sea-coast, especially in those which lie in such abundance along the Pacific coast of Guatemala. During Salvin's stay there in 1863 he not unfrequently saw small flocks of this Duck, and also obtained specimens. In Honduras Mr. Taylor found this Tree-Duck abundant on Lake Yojoa. From Costa Rica we have an example collected by Arce on the Gulf of Nicoya ; and at Panama, whence we also have a specimen, it is not uncommon. M'Leannan had a pair of this species alive when Salvin stayed at his Station at Lion Hill. The bird found on the Truando by Lieut. Michler's party probably belongs to this race; but we cannot speak with certainty on this point. It may also extend its range along the west coast as far as |