166 Mr. Swainson on several nea) groups in Ornilhologi/. 



Bill short ; culmcii depressed, straight. Wings lengthened, tl)e 

 primary quills either attenuated, or notched near their extrem- 

 ities. Tail long, forked. Feet short. 



Tjpe. 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 d^wn between them. 



-NENGETUS. 



Rostrum mediocre^ compressum. 



Al(e subbreveSf remigum pogoniis internis attenuatis. 



Pedes elongaii, robusti. 



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



quills attenuated. Legs lengthened, strong. 

 Type. T Nengeta. Sw. Monog. 



Family Merulidw. 



Sub-family Myiotherina. 



UROTOMUS. 



Rostrum ut in genere Drymophila. 

 Ala' brevissimw. 



Cauda brevissii/ia,fcre inconspicua. 



Pedes graciles, longi; tarsorum squamis latcralibus plerumquc 

 integris. 



Bill as in Drymophila. Wings \ery short. Tail very short, 

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

 generally entire. 



* Journal of Arts, Sic, edited at the Royul Iiii.litutioii, No. 40, Jiui. Ih'iO. 



