OCR Text |
Show 18"f)0 NEOTROPICAL ANATID.E. 3/5 Guayaquil; but this, too, remains to be determined ; nor can its eastward limit be as yet defined. The form found in Trinidad (as described by Leotaud) certainly belongs to the next species. 3. DENDROCYGNA DISCOLOR. Dendrocygna autumnalis, Cab. in Schomb. Guian. iii. p. 762 ; Scl. P. Z. S. 1864, p. 299 (partim) ; Scl. & Salv. P. Z. S. 1866, p. 200 (Ucayali); Leot. Ois. Trim p. 507(1866) (Trinidad); Schl. Mus. des P.-B. Anseres, p. 92; Pelz. Orn. Bras. p. 320 (1870); Finsch, P.Z.S. 1870, p. 589 (Trinidad). Canard Siffleur de Cayenne, Buff. Pl. Enl. 826. Dendrocygna discolor, Scl. & Salv. Nomencl. p. 161 (1873). Capite, collo antico, pectore et dorso superiore griseis, pileo obscuriore; gutture albicante, torque colli inferi indistincte castaneo; dorso medio late castaneo ; ventre, alis et cauda nigris; tectricibus alarum minoribus internis ochracescentibus, mediis canis, externis albis ; remigibus (extimo excepto) in pogonio externo et remigum tectricibus albis; crisso albo nigroque vario, rostro rubro, ungue nigro; pedibus flavis: long, tota 16*0, ala 8 0, cauda 2*5, rostri a rictu 2*2, tarsi2'0, dig. med. cum ungue 2*5 (Descr. exmpl. ex Surinam in Mus. S. & G.). Hab. Columbia, S. Martha (Deppe, in Mus. Berol.); Surinam (Kappler); Trinidad (Leotaud); Guiana (Schomb.) ; Cayenne (Buffon); Ucayali (Bartlett); Barrado Rio Negro, and Minas Geraes (Natterer). Obs. Similis prsecedenti, sed dorso superiore et pectore canis nee castaneis. This southern form of D. autumnalis is distinguishable at a glance from that of Central America by the upper portion of the back being of a different colour from the middle and lower back-the former being of a grey tint, the latter rich chestnut-brown. In the northern form no such difference is apparent, the whole upper surface being of the same chestnut tint. The breast in the former bird also is greyish, and in the latter chestnut. ' D. discolor, as we have proposed to term it, is found in the northern part of South America, extending from the littoral of Columbia and Guiana over the great Amazon valley, and occasionally ranging as far south as Mato Grosso and the interior of Minas Geraes, where specimens were obtained by Natterer. 4. DENDROCYGNA ARBOREA. Anas arborea, Linn. S. N. i. p. 207 (1766) ; Gm. S. N. i. p. 540 (1788); Vieill. Enc. Meth. p. 141 (1823). Dendrocygna arborea, Eyton, Mon. Anat. p. 110 (1838); Gosse, B. Jam. p. 395 (Jamaica); Cab. J. f. Orn. 1857, p. 227 (Cuba) ; Thienem. J. f. Orn. 1857, p. 157 (Cuba) ; A. & E. Newton, Ibis, 1859, p. 366 (St. Croix); Scl. P.Z.S. 1864, p. 300; March, Pr. Ac. Phil. 1864, p. 70 (Jamaica) ; Gundl. Repert. F.-N. i. p. 387 |