90 
ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
Sub-Fam. — FRINGILLINiE. 
1. Ammodramus longicaudatus. Gould. 
Plate XXIX. 
A. vertice humeroque cinereofuscis, dor so pallescenti fusco, uropygio rufescenti fusco 
tincto, plumis singulis striga media fused ; tectricibus alarum majoribus, remigibus 
primariis secundariisque et caudd nigrescentibus, cinereo albo externe marginatis ; 
fronte, striga superciliari corporeque infra flavescentibus. 
Long. tot. 5§ unc. ; alee , 2§ ; caudce , 3 ; tarsi, f ; rostri, 
Crown of the head and shoulder, greyish brown ; back, light brown, tinged with 
reddish brown on the rump, and with a stripe of dark brown down the centre 
of each feather; greater wing-coverts, primaries, secondaries, and tail blackish, 
margined externally with greyish white ; forehead, stripe over the eye, and 
all the under surface, buff; bill black ; feet brown. Young, or a bird after 
gaining its new plumage, differs in having the whole of the upper surface rich 
brown, with a tinge of olive and with a stripe of dark brown down each feather, 
and in having the wing coverts margined with reddish instead of greyish brown. 
Habitat, Monte Video (November), Maldonado (June). 
At Maldonado this bird frequented, in small flocks, reeds and other aquatic 
plants bordering lakes. In general habits, as well as in place of resort, it resem- 
bles those species of Synallaxis and Limnornis, with which it is often associated. 
It appears to live entirely on insects, and I found in the stomach of one which I 
opened various minute Coleoptera. Mr. Gould remarks, that the structure of this 
Ammodramus is very remarkable, for that it has a great general resemblance both 
in form and colouring to Synallaxis, although the thickness of its bill shows its 
relation to the Fringillinae. In its habits it certainly is more allied to the former 
genus, than to its own family. 
2. Ammodramus Maximbe, G. R. Gray. 
Plate XXX. 
Ammodramus xanthornus, in Plate, and in Gould’s MS. 
Fringilla Manimbb, Lic/it., Cat. No. 253. 
Emberiza Manimbe, D’Orb. 3? Lafr., Syn. p. 77. 
Manimbe, Azara, No. 141. 
My specimen was obtained from Maldonado. 
