Tiiis bird, like the last species, generally moves in very small flocks. Its
habits, I presume, are also very similar; for I state in my notes that it closely
approaches to our tit-mice in general manners and appearance.
3 . S e r p o p h a g a n ig r i c a n .s . Gould.
Sylvia nigricans, Vieill.
Taclmris nigricans, D’Orhig. Lafr. Mag. de Zool. 18
Le Petit Taclmris noirâtre, Azara, No. 167.
7. p. 55.
This bird is common in the neighbourhood of Maldonado, on the banks of the
Plata, It generally frequents the borders of lakes, ditches, and other moist
places; but is related in its general manners with the last species. It often
aliglits on aquatic plants, growing in the water. When seated on a twig it occasionally
expands its tail like a fan.
S u b .-F am .—TITYRANÆ. ( P s a r i a n æ , Sw .)
P a c h y r a m p h u s , G. R . Gray.
Pachyrhynclius, Spix.
] . P a c h y r a m p h u s a l b e s c e n s .
Paclij-rhjTiclms albescens, Gould, MS.
P late XIV.
P . olivaceo-griseus ; alis nigrescenti brunneis, albescenti marginatis ; gutture corporeque
subtus griseo-alhis ; alarum tectricibus infei'ioribus pallidè sulphureis.
Long. tot. 5 -^ unc. ; aloe, 2^% ; caudæ, 2 - ^ ; tarsi, ^ ; rost. -j%-
Head and all the upper surface olive grey; wings blackish brown, the coverts
and secondaries broadly margined with dull white ; primaries narrowly
margined with greyish white ; tail blackish brown, the external web of the
outer feather white; under surface of the shoulder pale sulphur yellow;
throat and under surface greyish white ; bill and feet black.
Habitat, Buenos Ayres.
The generic name of Pachyrhynchus Spix, is changed by Mr. G. R. Gray,
to Pachyramphus, as the former word is used in entomology.