On some new Species of South- American Birds. 267 



These measurements differ but very little from those given 

 by Mr. Wallace in the P. Z. S. 1863, p. 487, and by Mr. 

 Sharpe in his Catalogue of Accipitres, p. 105, but will be 

 seen, by a reference to the measurements which I have given 

 above of U. torquatus, to be considerably less than those of the 

 smallest examples, of the like sex, in that species. 



XXII. — Descriptions of some new Species of South- American 

 Birds of the families Tyrannidse and Formicariidse. By 

 P. L. ScLATER and Osbert Salvin. 



(Plate IX.) 



Amongst the recent additions to our collections are examples 

 of certain species of the families Tyrannidse and Formi- 

 cariidse, which seem to be undescribed. 

 They may be characterized as follows : — 



1. TODIROSTRUM SIGNATUM. 



Todirostrum maculatum, Scl. & Salv. P. Z. S. 1873, p. 278 

 (nee Desm.). 



Supra olivaceum, capite summo et nucha plumbeis, frontis et 

 pilei antici plumis medialiter vix nigricantibus ; alis et 

 Cauda fusco-nigris distincte olivaceo limbatis ; gula alba, 

 hac et pectore nigro vittatis, abdomine toto flavo, 

 hypochondriis olivaceo striatis ; rostro nigricante, mandi- 

 bulse basi subtus albicante; pedibus plumbeis : long tota 

 3"5, alse 19, caudfe 1*5. 

 Hub. Amazonia : Nauta [Bartlett), Pebas {Hauxwell), 

 Yquitos [Whitehj). 



Obs. T. maculato, Desm., affine, sed capite summo plumbeo 

 nee nigro facile distinguendum. 



The recent acquisition of specimens of the true T. macu- 

 latum from Bartica Grove, British Guiana, which were sent 

 us by Mr. H. Whitely, has enabled us to compare with them 

 Amazonian specimens formerly referred by us to that species. 

 We now find that the birds from Amazonia are really quite 

 distinct, having a grey instead of a black crown, and want- 



