NO. 2265. THE WREN 0ENV8 NANNUS BILLBERG—0BERH0L8ER. 225 



from the Pribilof Islands, Alaska, inosculates individually with 

 Nannus kiemalis helleri of Kodiak Island, Alaska, which, in turn, 

 clearl}' connects with Nannus kiemalis through Nannus hlcmalis 

 pacificus. Furthermore, Nannus nieligerus, which the writer de- 

 scribed as a distinct species, is now, by the acquisition of further 

 material, found to be linked with Nannus alascensis and Nannus 

 hiemalis pacificus through forms on the middle and eastern islands 

 of the Aleutian Chain. There is thus no logical alternative but to 

 consider all the known forms of the genus Nannus as subspecies of 

 a single type, which will therefore be Nannus troglodytes (Linnaeus) 

 as the earliest described form. Dr. E. Hartert has recently published 

 an excellent revision of the Palaearctic forms of this genus,^ and our 

 present interest is therefore especially in the American birds. Notes 

 on a few of the Old World species, however, may be pertinent in this 

 connection. 



Birds from Norway, with which I assume Swedish birds to be 

 identical, and which therefore represent typical Na7inus troglodytes 

 (Linnaeus),^ differ from those of middle Europe by reason of their 

 somewhat darker, duller, less rufescent upper parts; darker, more 

 ochraceous lower surface; and usually more distinct dark barring on 

 the lower back arid rump. The earliest name for the bird from 

 central and southern Europe is Troglodytes domcsticus Brehm,^ but 

 this is preoccupied b}^ Sylvia doniestica Wilson,* a synonym of 

 Troglodytes aedon Vieillot. The next and proper name for this 

 subspecies is Troglodytes sylvestris Brehm,^ described from Ger- 

 many, which therefore now should stand as Nannus troglodytes syl- 

 vestris (Brehm). 



The bird heretofore known as Troglodytes pallidus Hume requires 

 another name, since this Troglodytes pallidus^ is preoccupied by 

 Troglodytes pallida d'Orbigny.'^ Avhich is a synonym of Troglodytes 

 musculus hornensis Lesson. The earliest tenable name for Troglo- 

 dytes pallidus Hume is therefore Nannus tianschanicus (Sharpe).^ 



The race described as Olbiorchilus fumigatus atnurensis Clark,^ 



1 Vc5g(il palaarkt. Fauna, vol. 1, Heft VI, June, 1910, pp. 776-784. 



a See Hartert, Vogel palaarkt. Fauna, vol. 1, Heft VI, June, 1910, p. 778. 



' Handb. Natrirg. Vogol Deutschlands, 1831, p. 454 (Germany). 



*Amer. Ornlth., vol. 1, 1808, p. 129, pi. 7, fig. 3. 



* Handb. Naturg. Vogel Deutschlands, 1831, p. 45.5. 



8 Troglodytes pallidus Hume, Stray Feathers, vol. 3, Nos. 1-3, January, 1875, p. 219 

 (Kashgar). 



' Trofjlodytcs pallida d'Orbigny, Mag. de ZooL, vol. 7, 1837, CI. II, pis. 77-79, p. 25 

 (Rio Negro, Patagonia). 



^Troglodytes tianschnnicn Sharpe, Cat. Birds Brit. Mus., vol. 6, 1891, p. 273, footnote 

 (SevertzofC MSS.) (new name for Troglodytes pallidus Hume). 



"I'roc. U. S. Nat. Mus., vol. 32, June 15, 1907, p. 474 (Fusan, Korea). 



62055— 20— Proc.N.M.vol.55 16 



