616 Mr. Charles Chubb on the 



Basileuterus auricapillus Sharpe, Cat. B. Brit. Mus. x. 

 p. 393; Berlepsch, J. f. O. 1887, p. 114 (Paraguay) ; Kerr, 

 Ibis, 189.2, p. 123 (Rio Pilcomayo) ; Oherholser, Proc. U.S. 

 Nat. Mus. xxv. p. 141 (1902: Sapucay); Ihering, Revista 

 Mus. Paulista, vi. p. 318 (Paraguay). 



a. ? ad. Sapucay, October 10, 1902. 



b, c. S ad. >> December 1902. 

 d, e. S ad. „ February 1904. 

 /. S ad. „ March 16, 1904. 



Bill horn-coloured, lighter below ; tarsi and feet yellowish 

 horn-coloured ; iris brown. 



g. ? ad. Sapucay, April 9, 1903. 



h, i. ? ad. „ July 1904. 



I do not observe, in comparing this series of individuals, 

 that they ai'e darker above, but notice that the under surface 

 is brighter and clearer yellow. 



Having taken the wiug-measurements of the entire series 

 in the collection of the British Museum, I find that the 

 northern form from British Guiana, Trinidad, aud Colombia 

 is slightly larger. 



[This species is fairly common throughout Paraguay. 

 There is nothing peculiar about its habits. — W. F.~\ 



188. PARULA P1TIAYUMI. 



Pico de punzon celeste de pecho oro Azara, Apunt. i. p. 421. 

 no. cix. (1802). 



Sylvia pitiayumi Vieill. N. Diet. d'Hist. Nat. xi. p. 276 

 (1817 : Paraguay). 



Parula pitiayumi Sharpe, Cat. B. Brit. Mus. x. p. 259, 

 pi. xi. fig. 1 (1885). 



Cornpsothhjpis pitiayumi Berlepsch, J. f. O. 1887, p. 113 

 (Paraguay); Ihering, Revista Mus. Paulista, vi. p. 318 

 (Paraguay). 



Com psothlypis pitiayumi pitiayumi Oberholser, Proc. U.S. 

 Nat. Mus. xxv. p. 143 (1902). 



a. S imm. Sapucay, February 3, 1904. 



b, c. S ? ad. „ March 1903. 



