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Show 20 MR. P. L. SCLATER ON THE GENUS SYNALLAXIS. [Jan. 6, remigibus interne nigris: subalaribus cinnamomeis: gutture et collo antico albo maculatis: long, tota 4'5, ala 2-5, cauda 1'9. Hab. Columbia int. I have only met with this species in Bogota collections. It appears to be the Siptornis fiammulata of Reichenbach ; but I think it very doubtful whether it is the Sittasomus fiammulata of Lesson. 40. SYNALLAXIS HYPOSTICTA. (Plate IV. fig. 2.) Synallaxis hyposticta, Pelz. Sitz. Ak. Wien, xxxiv. p. 102, et Orn. Bras. p. 38. Fusca : pileo, alis extus et cauda tota rufis : subtus valde dilutior pectore maculis crebris nigris, ventrem versus evanescentibus, aspersa : mento fiavo tincto : rostro valido elongato : long, tota 5#6, alee 2*8, cauda 2*4. Hab. Rio Negro (Natt.) ; Pebas, Peru (Cast, et Dev.); Yura-cares, Bolivia (d'Orb.). H. v. Pelzeln has kindly sent me his unique specimen of this curious bird for examination. It was obtained by Natterer on the Rio Negro, opposite Boavista, in December 1830. It is rather a strongly formed species, but must, I think, be retained in the genus Synallaxis. Among the skins in the Jardin des Plantes are three of this species-an adult and a young specimen obtained at Pebas by Castelnau and Deville, and an adult obtained by D'Orbigny in the province of Yuracares, Bolivia. The figure (Plate IV. fig. 2) is taken from the typical example of Natterer. In the young bird the spots below are barely visible, and the throat and neck are suffused with rufous. Sect. b. Species pileo dorso concolori, striato aut substriato: alis extus et cauda 7'ufis. 41. S Y N A L L A X I S SUBCRISTATA. (Plate IV. fig. 1.) Synallaxis inornata, Scl. et Salv. P. Z. S. 1868, p. 167 (err.). Olivaceo-brunnea : pileo subcristato obscuriore, paulum striato : alis extus cum remigum marginibus externis rufis: subtus dilutior; tectricibus subalaribus et remigum marginibus internis cinnamomeis : rostro fiavicante, pedibus pallide fuscis : long, tota 5*8, ala 2*1, cauda 2" 7. Hab. Venezuela, prope urbem Caracas (Goering et Dyson) Mus. Brit, et P. L. S. * '' One of Mr. Goering's Venezuelan collections contained a single example of this species, which, however, was erroneously determined by Mr. Salvin and myself as 8. inornata. There is one skin of the same species in the British Museum, also obtained near Caracas by Dyson, and two in the Jardin des Plantes transmitted by M.Le-vraud from the same locality. The nearest ally of the present bird is S. ruticilla, from which it may be distinguished by the want or very slight indication of the white eyebrows, by the red colour of the wings extending over the |