TROGLODYTES. 



137 



Thryothorus ; in fact, connecting the two ; the tail is considerably 

 longer than in the two species mentioned, more as in T. ludovicianus. 

 For the opportunity of first examining this species, I am in- 

 debted to Mr. Osbert Salvin (No. 15, Salvin's collection, from 

 Oaxaca, type specimen received from Salle). Since the above de- 

 scription based on this specimen was written, the Institution has had 

 a skin from Mazatlan, agreeing in all essential respects. 



(34,016.) Iris bi-own. 



TROGLODTTES, Vieillot. 

 Troglodytes, Vieillot, Ois. Am. Sept. II, 1807, 52. (Type Troglodytes sedon.) 



By most European authors the European Wren is considered as 

 the type of the genus Troglodytes — Gray giving 1807 as the date 

 of its creation by Vieillot. In the Ois. Am. Sept., however, the 

 true type is the sedon there first named — the European species not 

 being mentioned at all. 



The characters of the genus are di£5cult to define, as they differ 

 but little from Thryothorus, and some species connect the two very 

 closely. The nostrils are as in Thryothorus, having an incumbent 

 thickened scale overhanging the rather linear nostrils. The bill is 

 shorter, or not longer than the head ; straight, slender, and without 

 notch. The tail is considerably graduated, generally shorter or not 

 longer than the wings, which are much rounded. 



The bill is straighter, shorter, and more slender than in Thryo- 

 thorus ; the size of the species much smaller ; the colors plainer, 

 more uniform, and almost entirely without the distinct light super- 

 ciliary line so general in Thryothorus and Thryophilus. 



The Winter Wren, T. hyemalis, agrees with the European species 

 in proportionably much smaller and narrower tail, only about two- 

 thirds the wing. T. brunneicollis agrees with it, to some extent, in 

 this respect. In the others the wing and tail are nearly equal. 



The following synopsis may serve to illustrate some of the peculi- 

 arities of the species : — 



