Paraguay, Bolivia , and Southern Brazil. 83 
Young . Bill paler than in the adult and yellow at the 
gape ; legs and toes more ashy. 
The October and November birds are worn, and the 
March bird has finished its moult. 
The Red-bellied Thrush was observed everywhere, and has 
a lively and pretty song. On the Estancias at Ajo it un¬ 
fortunately shews a great liking for the fruit, especially 
grapes, and is therefore somewhat of a nuisance. 
The nest is composed of grass or moss &c., lined with mud 
and then with fine grass, and the full clutch of eggs is four, 
though three is the most usual number found. 
3. Mimus modulator. 
Mimus modulator Sharpe, Cat. B. vi. p. 347 ; Arg. Orn. 
i. p. 5. 
a, h,c. S $ ad. Los Ynglases, Ajo. Oct. 12-20, 1908. 
d, e,f, g. $ ? ad. & yg. Los Ynglases, Ajo. Nov. 6-9,1908, 
h, i. $ $ ad. Los Ynglases, Ajo. Jan. 7, 1909. 
j. $ young. „ „ Jan. 21, 1909. 
k. S ad. „ „ Dec. 29, 1909. 
l. m. S ad. Nr. Santa Elena, N. Argentine. Nov. 15,1909. 
Ad. Irides grey; bill black, livid at base of lower 
mandible; legs and toes almost black. 
Young . Irides grey; bill, legs, and toes greyish; gape 
yellow. 
All the adults, especially the December birds, are shewing 
signs of wear and fading. 
The two from Santa Elena are darker above than the 
southern birds, but are very much worn and the edges to 
the feathers are almost totally abraded. 
The young bird differs from the adult in having “the 
mantle, rump, and the edges of the secondaries and wing- 
coverts brown; below buffy white spotted and streaked with 
blackish; throat as in the adult.” 
A common resident species in the Ajo district, but by no 
means often observed on the river expedition. 
o 2 
