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Show 1869.] BIRDS FROM THE ARGENTINE REPUBLIC. 161 2. STEPHANOPHORUS LEUCOCEPHALUS (Vieill.). Lindo azul cabeza blanca, Azara, Apunt. i. p. 375. no. 93. Tanagra leucocephala, Vieill. N. D. xxxii. p. 408, et E. M. 774. Several skins of this Tanager. 3. DONACOSPIZA ALBIFRONS (Vieill.); Cab. Mus. Hein. i. p. 136. Poospiza albifrons, Burm. I. c. p. 484. Cola aguda vientre de canela, Azara, Apunt. ii. p. 263. no. 234. Poospiza oxyrhyncha, Sclater, P. Z. S. 1864, p. 168, ex MS. Natt. On comparing the present specimen with Sclater's type oi Poospiza oxyrhyncha, there remains no doubt of their identity. Natterer's specimen in Sclater's collection, which was obtained at Curytiba in Brazil, has the tail-feathers rather worn. The species is well figured in the ' Voyage of the Beagle' (t. 29) as Ammodramus longicaudatus. 4. SYCALIS CHLOROPSIS. Crithagra chloropsis, Bp. Consp. i. p. 521. Sycalis chloropis, Burm. Journ. f. O. 1860, p. 257, et La Plata- Reise, ii. p. 489. A pair of what we suppose to be this Sycalis, which has not been very sufficiently described either by Bonaparte or Burmeister. It is most nearly allied to S. brasiliensis, but rather smaller, with the front less deeply orange, and the back strongly striated with fuscous. 5. STURNELLA DEFILIPPII, Bp.; Sclater, Cat. A. B. p. 138. Trupialis militaris, Burm. 1. c. p. 490. Tordo degollado primero, Azara, Apunt. i. p. 304, no. 68. Easily known from the true S. militaris (which is found near Mendoza and along the Cordilleras) by its black under wing-coverts. 6. AMBLYRHAMPHUS HOLOSERICEUS (Scop.); Sclater, Cat. A. B. p. 137. A. ruber, Burm. I.e. p. 491. Tordo negro cabeza roxa, Azara, Apunt. i. p. 316. no. 72. 7. PICOLAPTES ANGUSTIROSTRIS (Vieill.); Lafr. Rev. Zool. 1850, p. 151. Trepador comun, Azara, Apunt. ii. p. 279, no. 242. Nearest to P. bivittatus, as pointed out by Lafresnaye, but recognizable by the well-marked strise below and the longer beak. Not mentioned by Burmeister. 8. MYIARCHUS SWAINSONI, Cab. et Heine, Mus. Hein. ii. p. 72. Suiriri pardo amarillo menor, A<Vzara, Apunt. ii. p. 138. no. 193. W e are inclined to think this form may be really distinguishable from M. ferox, although in some cases it is exceedingly difficult to say to which of the two species a particular skin should be referred. A Nattererian specimen of Myiarchus cantans (Pelzeln, Orn. Bras. PROC. ZOOL. Soc-1869, No. XL |