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Show 1876.] NEOTROPICAL ANATID/E. 409 1. MERGUS CUCULLATUS. Mergus cucullatus, Linn. S. N. i. p. 207 (1766); Cab. J. fiir Orn. 1857, p. 231 (Cuba) ; Scl. et Salv. Nom. Av. Neotr. p. 131. Lophodytes cucullatus, Baird, B. of N. A m . p. 816; Gundl. Repert. F.-N. i. p. 391, et J. fiir Orn. 1875, p. 385 (Cuba); Sclater, P. Z. S. 1859, p. 369 (Jalapa). Hab. Cuba (Gundlach); Mexico (De Oca). The Hooded Merganser is of rare occurrence on passage in Cuba, and does not appear to have been noted elsewhere within our limits, except in South-eastern Mexico. 2. MERGUS OCTOSETACEUS. Mergus octosetaceus, Vieill. N. D. xiv. p. 222 (1817), et Enc. Meth. p. 351 (1823) (Brazil). Meryus brasilianus, Vieill. Gal. des Ois. ii. p. 209, t. 283 (1834); Evton, Mon. Anat. p. 176 (1838) ; Burm. Syst. Ueb. iii. p. 441 ; Pelz. Orn. Bras. p. 322 (1870) ; Schl. Mus. des P.-B. Anseres, p. 6 ; Scl. et Salv. Nom. Av. Neotr. p. 131. Meryus fuscus, Licht. Doubl. p. 85 (1823). Mergus lophotes, Cuv. M S . (teste Schlegel). Supra fusco-niger purpureo vix tinctus; plaga alarum duplici, fascia nigra divisa, alba; cervice postica aneo micante; pileo et crista elongata tenui saturate fumoso-nigris ; abdomine saturate cinereo, fasciis numerosis albis in ventre signato ; cervice antica et pectoris lateribus griseo et nigro confertim vermiculatis; rostro nigro, pedibus flavidis ; long, tota 19*0, ala 7'2, cauda 4*0, tarsi 1*4, rostri a. rictu 2*2. Hab. S.E. Brazil, Sao Paulo (Licht.); Rio Ytarare (Natt.). This scarce Merganser was first described by Vieillot from Dela-lande's specimens in the Paris Museum, and subsequently figured by the same author under another name. Lichtenstein gives Sao Paulo as its locality ; and Natterer obtained five examples on the River Ytarare in the southern part of that province in August 1820. One of these skins, marked as the female sex, is now in the collection of Salvin and Godman, whence our description is taken. IV. Table of the Geographical Distribution of the Neotropical Anatida, with remarks thereon. On referring to the last column of the Table (pp. 410 & 411), it will be seen that out of the 62 species of Anatidae included in the Neotropical list 25 are likewise found in North America. Of these 25, however, two (Dendrocygna fulva and Querquedula cyanoptera) are visitors from the south ; and the Nearctic species which intrude into the Neotropical region (mostly in winter) are, so far as is at present known, 23 in number, namely Anser hyperboreus, Anas boschas, carulescens, obscura, gambeli, strepera, Bernicla canadensis, Querquedula carolinensis, P R O C ZOOL. SOC-1876, No. XXVII. 27 |