Mr. Swainson on several new groups in Ornithologi/, 173 



SIALIA. 



Rostrum breve, bast depressum, laieribus compressis ; culmine 

 subelevato : naribus plumulis setaceis obtectis ; rictu lato, sub" . 

 barbato. 



Alee elongatce ; remige l^^ spuria, brevissimd, ^dd et 4^^ fere 

 cequalibuSj 3'*^ longissima, 



Cauda subjurcata. 



Pedes breviusculij subfortes j tarsorum squamis later alibus integris. 



Bill short, the base depressed, the sides compressed, culmen 

 slightly elevated : nostrils partly hid by setaceous feathers : 

 mouth wide, and slightly bearded. TVings elongated, the first 

 quill very small; the second nearly equal to the fourth, the 

 third longest. Tail slightly forked. Legs rather short, robust; 

 lateral scales of the tarsi entire. 



Type. Sylvia Sialia, Wilson, 1. pi. 2. f. 3. (Sialia JVilsonii. Sw.) 



The habits and economy of this bird are so peculiar, and unite 

 the characteristics of so many different families, that its natural 

 affinities are extremely doubtful. Its frugivorous habits, however; 

 have induced me, for the present, to place it at the confinies of the 

 Thrushes. Its true situation I consider as one of the most inte- 

 resting points in the study of natural affinities.^ 



Family Pipridoe. 

 PIPRAEIDEA. 



Rostrum ut in genere Pipra, 



Alee elongatce, remigibus l^^, l^a. et 2ti^ fere wqualibus, longis- 



simis, 

 Cauda mediocris ,fere wqualis. 

 Pedes breves, subfortes; digito exteriore medio ad basin con^ 



juncto: tarsorum squamis anterioribus divisis,lateralibus integris. 



Bill as in Pipra. Wings long, the first, second, and third quills 

 nearly equal and longest. Tail moderate, nearly even. Feet 



* I have recently received another beautiful species from Mexico. 



