58 MR. P. L. SCLATER ON BIRDS FROM THE PARANA. [Jan. 27, 
somewhat reminds one of Sayornis; but it appears to belong struc- 
turally to Cnipolegus, and I propose to call it 
CNIPOLEGUS CINEREUS, Sp. nov. 
Obscure cineraceus fere unicolor, tectricum alarum et secundario- 
rum marginibus angustis paulo dilutioribus ; fronte, oculorum 
ambitu, et cauda tota nigricantibus ; remigum externorum api- 
cibus angustatis, acutis, eorum omnium pogoniis internis in parte 
basali et maculis quibusdam hypochondriorum absconditis albis: 
vostro nitenti-corneo, pedibus obscure carneis: long. tota 5-3 
poll. Angl., ale 2°3, caude 2°5, tarsi 0°75. 
Hab. Corumba, in ripis fl. Paraguay superioris. 
Mus. Smithsoniano, no. 16,355. 

Cnipolegus cinereus. 
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. ‘he 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 gra- 
duated. 
The tail is nearly square, the outer rectrices being but little shorter 
than the median. ‘The feet are those of the other Cnipolegi, but 
perhaps rather more slender. 
