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Show 1874.] MR. P. L. SCLATER ON THE GENUS SYNALLAXIS. 23 48. SYNALLAXIS AREQUIP^E. Synallaxis orbignii, Scl. et Salv. P. Z. S. 1867, p. 986 (excl. syn.). Synallaxis arequipa, Scl. et Salv. P. Z. S. 1869, p. 417. Supra fusca, pileo parum obscuriore, uropygio rufo : alis extus fusco-nigris, tectricibus et secundariis fusco indistincte marginatis : cauda nigra, rectrice una utrinque extima fere omnino et duabus utrinque proximis in pogonio exteriore rufis : subtus lacteo-alba, macula gulari, tectricibus subalaribus, hypochondriis et crisso rufis: rostro obscure corneo, pedibus nigris: long, tota 6*8, ala 2'7, cauda 3, tarsi 1. Hab. Peruvia occ. prope Arequipa (Whitely). Obs. Sp. gula, sicut in prsecedente, rufa, sed secundariis nigris, neque extus et in dimidio basali intus rufis, distincta. 49. SYNALLAXIS MODESTA* Synallaxis modesta, Eyton, Contr. Orn. 1851, p. 159 ; Scl. P.Z.S. 1867, p. 324, 1872, p. 544. Synallaxis fiavigularis, Burm. La-Plata Reise, ii. p. 468. Synallaxis sordida, Ph. et Landb. Cat. Av. Chil. p. 13. Supra cineraceo-fusca: superciliis indistincte albidis : alis fusco-nigris fusco limbatis, remigum parte interiore in dimidio basali et subalaribus late fulvis : subtus valde dilutior, pallide ochraceo-cinerea, gula macula rufescente : cauda nigra, rectricibus externis fulvo externe limbatis : long, tota 6, ala 2*3, cauda 2-5. Hab. Rio Negro of Patagonia (Hudson); Mendoza (Burm.) ; Chili (Reed). Obs. Sp. a Synallaxi sordida cauda pictura distinguenda. I have compared m y specimens of this species with the type in Mr. Eyton's collection. M r . Salvin has a skin, obtained by Burmeister at Mendoza, marked S. fiavigularis, which certainly belongs to this species, not to S. sordida. 50. SYNALLAXIS HUMILIS. „ Synallaxis humilis, Cab. J. f. O. 1873, p. 319. Supra fusca : alis caudaque nigricanti-fuscis rufescente extus limbatis : rectricibus lateralibus in centro pallidioribus et rufescente tinctis : subtus ochracescenti-alba : superciliis longis, capitis lateribus et gutture toto albis fusco striolatis: macula gulari rufa : subalaribus et macula magna ad basin remigum rufis : rostro elongatiore, recto: cauda rectricibus duodecim: long. tota 6, ala 2*8, cauda rectr. med. 2'6, ext. 1*8. Fcem. mari similis, sed minor. Hab. Peruvia occ, Junin (Jelski). Mus. Varsoviano. Obs. Similis S. modesta, sed marginibus rectricum rufis caret et rostro fortiore necnon superciliis distincta. 51. SYNALLAXIS SORDIDA. Synallaxis sordida, Less. Rev. Zool. 1839, p. 105 ; Bp. Consp. |