164 Mr. Swainson on several new groups in Ornithologi/. 



T)^pes. Le Curouge. Levaill. Ois. d'Af. pi. 107. f. 1. 

 Turdus Jtriceps. PL Col. 147. 



It is only from the unusual shortness of the feet, indicative of 

 these birds feeding upon the wing, that I here associate them 

 among the aberrant forms of the sub-family Dicrurina. There 

 are many species, all of which appear excluded both from the 

 new world and Australia. 



In a natural series they will immediately follow the genus 

 Trichophorus. 



Suh-family Campephagina f 



PTILIOGONATUS. 



Rostrum breve^ depressum, suhtriangulare^ culmine elevato, sub- 



arcuato ; tomiis rectis. Naribus subnudis y aperturd setis 



debilibus paucis instructa. 

 Alee mediocresj rotundatce^ remigibus A^^ et 5'^ fere cequalibusy 



longissimis, 

 Cauda subelongata^ in medio subfurcata, rectricibus lateralibus 



rotundatis. 

 Pedes brevissimiy genibus plumatisy unguibus parvis, acutis. 



Bill short, depressed, somewhat triangular; culmen elevated, 

 slightly curved ; commissure straight. Nostrils naked, the 

 aperture furnished with a few week bristles. Wings moderate, 

 rounded ; the fourth and fifth quill longest. Tail rather 

 lengthened, the sides rounded, the middle slightly forked. 

 Feet very short, knees feathered, claws small acute. 



Type. P. cinereus, Sw. Mex. Zool. 



P. cinereus ; mento rectricumque lateralium medio albis ; caudce 

 tegminibus inferioribus Jlavis; alis cauddque nitide nigris, 

 Mas ? 



This is one of the most remarkable birds among those which 

 have been recently discovered in the interior of Mexico. It ex- 



