84 
ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
is somewhat larger in all its dimensions. The length of the whole body is .6 of 
an inch greater, of wing when folded .45, of tarsus .2, greater than in the forego- 
ing species. I can scarcely hesitate in thinking it a large-sized local variety, 
from some favourable condition in the Falkland Islands to its growth. 
3. Muscisaxicola brunnea. Gould. 
M. griseo-fusca ; gutture abdomineque albis Jlavescenti tinctis, pectore obscuro ; alis 
caudaque obscure fuscis, singulis plumis rufescenti fusco marginatis ; rectricum ex- 
ternarum radiis later alibus jlavescentibus. 
Long. tot. 5 unc. ; rostri, ^ ; alee, 3§ ; caudoe , 2-|; tarsi, 1. 
Head, and all the upper surface greyish brown ; wings and tail dark brown, each 
feather margined with reddish brown ; the outer webs of the external tail 
feathers buffy white; throat and all the under surface white, slightly tinged 
with buff ; bill and feet blackish brown. 
Habitat, Port St. Julian, Patagonia. {January). 
The only specimen I procured was immature. 
4. Muscisaxicola nigra. G. R. Gray. 
Alauda nigra, Boddater. 
rufa, Gmel. 
fulva, Lath. Index. 
Anthus fulvus, Vieill. Ency. Meth. p. 309. 
' variegatus, Gerv. fy Eydoux , Mag. de Zool. 1836, p. 26. 
Sylvia dorsalis, King. 
Lessonia erythronotus, Sicains. Class, of Birds. 
Alouette noire a dos fauve, PI. enl. 738. 
L’Alouette a dos rouge, Azara, No. 149. 
This bird has a wide geographical range. It is found in La Plata, Pata- 
gonia, Tierra del Fuego, and on the west coast at least as far north as the valley 
of Copiapo, in Northern Chile. It is every where common : it is a quiet, tame, 
inoffensive little bird : it lives on the ground, and frequents sand-dunes, beaches, 
and rocky coasts, which it seldom leaves : the broad shingly beds of the rivers in 
Chile have, however, tempted it inland, together with the Opetiorhynchus. I was 
told that it builds in low bushes. 
