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Show 58 MR. P. L. SCLATER ON BIRDS FROM THE PARANA. [Jan. 27, somewhat reminds one of Sayornis; but it appears to belong structurally to Cnipolegus, and I propose to call it CNIPOLEGUS CINEREUS, sp. nov. Obscure cineraceus fere unicolor, tectricum alarum et secundariorum maryinibus angustis paulo dilutioribus ; fronte, oculorum ambitu, et cauda tota nigricantibus ; remiyum externorum apicibus angustatis, acutis, eorum omnium pogoniis internis in parte basali et maculis quibusdam hypochondriorum absconditis albis: rostro nit enti-corneo, pedibus obscure carneis : long, tota poll. Angl., alee 2*3, caudce 2*5, tarsi 0*75. Hab. Corumba, in ripis fl. Paraguay superioris. Mus. Smithsoniano, no. 16,355. This bird agrees in every essential part of its structure with the smaller species of Cnipolegus forming the section Sericoptila, but may be distinguished at once by its nearly uniform dark cinereous colouring, with paler brownish edgings to the wing-coverts and secondaries. The bill is like that of Cnipolegus unicolor, differing only in being slightly narrower. As in the last-named species, also, the outermost primaries are very narrow throughout their length and pointed at their extremities. The fourth primary is longest, slightly exceeding the fifth, the outer three being graduated. The tail is nearly square, the outer rectrices being but little shorter than the median. The feet are those of the other Cnipoleyi, but perhaps rather more slender. |