186 



NEW ORNITHOLOGY OF NEPAL. 



be distinctly traced through Cinclosoma and PomatorJiinus. Timalia, 

 again, has been removed by systematists, toto caelo, from PomatorJiinus 

 and from Prima : and yet there can hardly be a question that Timalia 

 forms a sub-generic link, uniting the two, and also connecting the genus 

 PomatorJiinus with the genus Cinclosoma. I possess a series of Poma- 

 torJiini, Timalioe, and Cinclosomoe, which blend insensibly with each other, 

 at the same time that they collectively exhibit, in a striking manner, the 

 general attributes of Mr. Swainson's Crateropodina^ . 



Nhpal, August 29tJi. 



IX.-NEW SPECIES OF MOTACILLIN^. 



WITH INDICATION OF A NEW GENUS BELONGING TO THIS SUB-FAMILY. 



Sylviad^. MotacillintE. Sub- Genus, new ; Dahila nobis. 

 Tt/pe, Dahila Docilis, nobis. 



No. 439 of the new series of Specimens and Drawings in possession of 

 the Zoological Society of London. 



The birds of this genus in both structure and habits are a perfect com- 

 pound of Tiirdus and Motacilla* The bill in all its details, and the feet 

 are Merulo-motacilline, but with a more decided leaning to the Thrush than 

 to the Wagtail. The tarsi are stronger and more elevated than in either 

 genus, the thumbs broader and the nails more acute. The wings are shorter 

 than in either genus, and exhibit the form and proportion seen in Enicurus : 

 that is, the 5th quill is longest ; the 1st and 2d abruptly ; the 3d and 4th 



slightly gradated up to it ; and the tertials (nott scapulars) are short, broad 

 and fine. The tail composed of 12 feathers, is shorter than in Motacilla, 

 longer than in Tardus ; its six lateral plumes are considerably gradated from 



* Hegarding the two genera in the large sense, or as emblematic of the respective sub- 

 families, and not merely as genera. 



t It is the tertials, not the scapulars of Motacilla which are elongated, notwithstanding 

 the general doctrine of books. 



