CERTHIAD.E. 317 



same species as the T. cedon of Vieillot, the figure given by the latter writer is 

 particularly faulty. The bill is represented much too long, and the tail as perfectly 

 even ; neither is the form of the latter mentioned in M. Vieillot's description. 

 The notice of the Sylvia furva by Dr. Latham is so loose, that it may be applied 

 to several species now before us, and therefore deserves not to be retained in 

 systems. Dr. Latham's account, in fact, is taken from Brown's figure (Illustr. 

 of ZooL, pi. 38, f. 2), from which all authors who mention T. furvus have com- 

 piled their descriptions. — Sw. 



The only specimen we have of this Wren was procured by Mr. Drummond 

 at the foot of the Rocky Mountains. It was not seen either farther to the east- 

 ward or to the northward ; but^ in our hurried journeys through the country, 

 so diminutive a bird might readily escape observation. 



DESCRIPTION 

 Of a male, killed in lat. 55°, near the sources of the Elk River. 



Colour. — Upper plumage dark hair-brown, crossed by narrow bars of umber, which are 

 nearly obsolete on the head and neck, and most distinct on the tail and its coverts, where 

 they are shaded off with grey : quill feathers spotted on the edges with brownish-grey. 

 Cheeks and under plumage smoke-grey, slightly tinged with brown on the breast and flanks. 

 Bill dark umber: the under mandible and legs yellowish-brown. — R. 



Form nearly typical. Size of T. palustris, which it resembles in the comparative length 

 of its tail, and in its general structure ; the bill, however, is smaller and not so long, 

 and the very faint indication of a notch in the upper mandible of palustris is not seen in 

 this. The tarsi are rather longer and the hind claw is hardly more produced than in our 

 European Wren : the length of the tail seems to render this the first species which quits 

 the typical structure, on the advance of Nature towards the long notch-billed Thryothori. 

 — Sw. 



Dimensions. 



Inch. Lin. Inch. Lin. Inch. Lin. 



Length, total . . .46 Length of bill above . .0 5| Length of middle toe . .0 



„ of tail . .20 „ of bill to rictus . 7£ „ of its nail If 



„ of wing . . 2 1 J „ of tarsus . . 7i „ of hind toe . .0 3f 



„ of hind nail. . 2£ 



