78 
ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
acute, but not loud, rapidly reiterated cry. They are active and busily seek for 
small insects, chiefly Coleoptera, in the coarse herbage. The iris in all is rusty 
red ; the tongue is divided and terminates in bristly points. These reed birds, 
which are very numerous both in species and individuals, on the borders of lakes 
in the provinces north of the Plata, appear to supply in South America, the 
various Sylvise, which frequent similar stations in Europe. 
5. Synallaxis flavogularis. Gould. 
Plate XXIV. 
S. supra fuscescenti cinereus, infra cinereo-fuscus ; remigibus obscure fuscis, basi obscurb 
rufis ; caudce plumis sex mediis nigro-fuscis, externis ferrugineis ; genis gulaque 
Jlavescentibus, plumis singulis apice obscurb fuscis. 
Long. tot. 6|- unc ; rost. f ; aloe , 2 | ; caudce , 3| ; tarsi , f ; 
Head and all the upper surface, brown ; primaries, dark brown, with the basal 
portions rufous ; six central tail-feathers, blackish brown ; the remainder fer- 
ruginous ; sides of the face and throat yellowish, with the tip of each feather 
dark brown ; the remainder of the under surface, greyish brown ; bill and 
feet, dark brown. 
Habitat, Patagonia. 
My specimens were obtained at Bahia Blanca and at Santa Cruz, two extreme 
parts of Patagonia. It frequents the thinly scattered thickets on the arid plains : 
the hind claw of its foot is not produced as in S. rufogularis, and it lives less on 
the ground. 
6. Synallaxis brunnea. Gould. 
S. pallide rubro fusca ; primariis secundariisque rufis apice fuscis ; caudce plumis qua- 
tuor mediis nigrescenti fuscis , duabus proximis ferrugineo fuscis inter nb nigres- 
centi-marginatis, duabus extimis ferrugineo fuscis ; genis, guld abdomineque medio 
albescentibus ; hypochondriis cinereis. 
Long. tot. 5 t \ ; unc. rost. ; alee, 2-fy ; caudce, g ; tarsi, -pa. 
Head and all the upper surface pale reddish brown ; primaries and secondaries, 
brown at the tip and rufous at the base ; four central tail feathers, blackish 
brown ; the next on each side rusty brown, margined internally with black- 
ish brown ; the two lateral feathers wholly rusty brown ; sides of the face, 
throat, and centre of the abdomen, whitish ; flanks cinereous ; bill and feet 
brown. 
Habitat, Port Desire, Patagonia. ( January ;.) 
