Arrenga Less , Traite d'Orn., p. 388 (1831). Type, Arrenga cyanea Horsf.
The genus Arrenga is represented within our limits by one species, an inhabitant of Ceylon. It is very closely allied to the Brachypteryginae having a very short, rounded wing with the 5th, 6th and 7th primaries longest and subequal and it also has very long tarsi. Its position is possibly between the true Shortwings such as Hodgsonius and Larvivora, and the true Thrushes represented by Myiophoneus but is nearer on the whole to the latter than the former.
The bill is stout and shaped like that of Myiophoneus though rather shorter, being only about half as long as the head; the rictal bristles are well developed and the nostrils are rounded. The tail is rather short and very slightly graduated.