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. 



S. Mtmus modulator. 



Mimus modulator Sharpe, Cat. B. vi. p. 347 ; Arg. Orn. 

 i. p. 5. 



a, b,c. S ^ ad. Los Ynglases, Ajo. Oct. 12-20, 1908. 



d, e,f,g. S ? ad. &yg. Los Ynglases, Ajo. Nov. 6-9, 1908. 



h, i. (^ ? ad. Los Ynglases, Ajo. Jan. 7, 1909. 



j. ? young. J, „ Jan. 21, 1909. 



k. S ad. „ „ Dec. 29, 1909. 



I, 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. 



o2 



