448 



TROGLODYTID^, 



(461) Troglodytes troglodytes tibetanus. 



The Tibetan Ween. 



Ano7-thura tibetana "Walton, Bull. B. O. C, xv, p. 93 (1905)(Khamba 

 Jong, Tibet). 



Vernacular names. Noue recorded. 



Description. Exactly like T. t. negJectus except that it is de- 

 cidedly bigger. 



Colours of soft parts. None noted. 



Measurements. Wiug 53 and 56 mm,; tail 33 mm.; tarsus 17 

 and 18 mm.; culmen 13 mm. 



Distribution. Khamba Jong, Tibet. 



Nidification unknown. 



Habits. Walton records (Ibis, 1906, p. 74) that he shot several 

 of these AVrens at Khamba Jong in the autumn : " Tliey occurred 

 there during very cold weather, \Aheu all the streams were frozen 

 hard, except one that was supplied by a clear warm spring." 



Genus ELACHURA Gates, 1889. 



This genus was created by Gates for the little Wren Troglochjtes 

 formosus {punctatus), which differs from the typical birds of the 

 genus Troglodytes in having a much stouter bill and a more 

 graduated tail. The plumage in Elacliura is spotted and not 

 barred. 



In Elacliura tlie sexes are alike and the young are probably 

 similar to the atkilt. The bill is stout and almost half the lengtl'i 

 of the head. Tlie wing is very short and rounded and the first 

 primary is about two-thirds the length of the second. The tail is. 

 well graduated, the outer feathers reaching to about the middle 

 of the central ones. The tarsi, toes and claws are long and 

 strong. There are only two species known and one of these, 

 Elacliura liaplonota, is represented by a single specimen. 



Key to Species. 



A. Upper plumage spotted , Elacliura formosa,* p. 449. 



B. Upper plumage unspotted Elachura haphnota^ p. 450. 



* The name punctata cannot be used for this little Wi-en as Troglodytes 

 punctatus is already preoccupied by Brebni. Troglodytes for jiiosus of Waldeii 

 is therefore the next available. 



