Paraguay, Bolivia, and Southern Brazil. 115 



The April young bird is moulting and the new feathers on 

 the under parts are black, broadly edged and tipped with 

 ashy, which points to an intermediate immature stage before 

 the adult dress is reached. 



The young appear to differ from the adult as follows : — 



Young male. '' Similar to adult female, except perhaps 

 cheeks and throat somewhat paler." 



Young female. " Above, including back, brown ; beneath 

 paler ashy than adult." 



This species is a winter visitor to the Ajo district, making 

 its appearance about the 8th of January and leaving again 

 in July, Miss Runuacles^ last record being the 26th of that 

 month. It usually frequents open ground where little or no 

 vegetation exists, especially well-worn roads and tracks. 



In the middle of the winter, when the majority have arrived, 

 as many as thirty or forty may be seen together, continually 

 darting backwards and forwards catching their insect food. 

 When alarmed they will fly for quite considerable dis- 

 tances before alighting, the flight being swift and fairly 

 straight, but always close to the ground. 



The young are indistinguishable in life from the adult 

 females, and neither are easily seen on the ground they 

 frequent; but the black and chestnut adult males make 

 conspicuous objects. 



81. TODIROSTRUM CINEREUM. 



Todirostrum cinereum Scl. Cat. B. xiv. p. 69. 



a. S ad. Rabicho, Brazil. Oct. 8, 1909. 



b. (J ad. Cabo Emma, Paraguay. Oct. 20, 1909. 

 Irides pale yellow ; bill very dark slate-coloured; legs 



and toes blue-slate-coloured. 



82. EUSCARTHMUS MARGARITACEIVENTRIS. 



Euscarlhmus margaritaceiventer Scl. Cat. B. xiv. p. 80 ; 

 Arg. Orn. i. p. 136. 



a. '^ ad. Puerto Pinasco, Paraguay. Sept. 7, 1909. 



b,c. d ^ ad. Pan de Azucar, Brazil. Sept. 17, 1909. 



d. S ad. Cabo Emma, Paraguay. Oct. 20, 1909. 



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