166 Mr. Swainson on several new groups in Ornithology, 



Bill short ; culmen depressed, straight. Wings lengthened, the 

 primary quills either attenuated, or notched near their extrem- 

 ities. Tail long, forked. Feet short. 



Type. Tyrannus Savana. Vieill. Ois. de L'Am. pi. 43. 



I have elsewhere* endeavoured to point out the natural groups 

 into which the genus Tyrannus of M. Vieillot appears to be di- 

 vided. It remains therefore only to distinguish these groups by 

 names; between each of their respective types, there exists a 

 striking difference, but these peculiarities (as in all natural groups 

 where the chain of connection is nearly perfect) become so di- 

 minished in the series of species, that no line of demarcation can 

 be drawn between them* 



NENGETUS. 



Rostrum mediocre^ compressum. 



Aloe subbreves, remigum pogoniis internis attenuatis* 



Fedes elongati^ robusti. 



Bill moderate, the sides compressed. Wings rather short, the 



quills attenuated. Legs lengthened, strong. 

 Type. T. Nengeta. Sw. Monog. 



Family Merulidce, 



Sub-family Myiotkerina» 



UROTOMUS. 



Rostrum ut in genere Drymophila. 

 Alee brevissimce, 



Cduda brevissima^fere inconspicua. 



Fedes graciles^ longi; tarsorum squamis later alibus plerumque 

 integris, 



BUI as in Drymophila. Wings very short. Tail very short, 

 scarcely seen. Feet long, slender, lateral scales of the tarsi 

 generally entire. 



♦ Journal of Arts, &c., edited at the Royal Institution, No. 40, Jan. 1826. 



