60 Mr. Charles Chubb on the 



COLUMBA PALLIDICRISSA, Sp. n. 



Like C. rufina, this bird has no distinct subterminal blackish 

 shade on the tail such as is seen in C. sylvestris, although there 

 is a slight dusky appearance before the pale end of the feathers. 

 It differs from C. rufina in its much paler under tail-coverts, 

 these being white fundamentally, with a slight tinge of pearly 

 grey. The characters seem fairly constant throughout the 

 series of skins in the British Museum. 



This species inhabits Central America from British 

 Honduras to Panama. Type, <^ , Costa Rica (/. Carmiol : 

 Mus. Salvin-Godman) . 



The four allied species may be diagnosed as follows : — 



a. Cheeks and ear-coverts ashy. 



a'. Subterminal shade before the light ashy tips of the 

 tail-feathers distinctly blackish ; under tail-coverts 

 slaty grey sylvestris. 



V . Subterminal shade before the paler ends of the tail- 

 feathers dusky blackish or dull ashy ; under tail- 

 coverts pale ashy grey rufina. 



c'. Scarcely any sub-terminal shade before the paler 

 ends of the tail-feathers ; under tail-coverts whitish 

 with a slight wash of pearly grey pallidicrissa. 



b. Cheeks and ear-coverts vinous ; under tail-coverts of a 



dark lead-colour, darker than the abdomen ; tail- 

 feathers black with no subterminal band cenopx. 



7. ZENAIDA AUItlCULATA. 



Paloma par da manchada Azara, Apunt. iii. p. 17. no. 

 cccxxii. (1805) ; Vieill. N. Diet. d'Hist. Nat. xxvi. p. 351 

 (1818). 



Columba maculata Vieill. (nee Gra.) Enc. Meth. i. p. 376 

 (1820), ex Azara. 



Zenaida aurita Hartl. Ind. Azara, p. 20. no. 322 (1847). 



Zenaida maculata (Vieill.), Berlepsch, J. f. O. 1887, 

 p. 34 (Pilcomayo). 



Zenaida auriculata (Des Murs), Salvad. Cat. B. Brit. 

 Mus. xxi. p. 384 (1893) ; Ihering, Revista Mus. Paulista, 

 vi. p. 341. 



Zenaida virgata Bertoni, Aves Nuev. Paraguay, p. 24 

 (1901). 



