or WUloiv-Warblers . 71 



Ibis, 1873, p. 61) . It has been shot at Mesen {Piottuch in 

 Mus. H. Seebohm) and on the Petchora {Seebohm snad Harvie 

 Brown, Ibis, 1876, p. 216). Skins collected by Dr. Dy- 

 bowski near Lake Baical are common in collections. Mid- 

 dendorflp (fide Meves) found it as far east as Okotsk. Prje- 

 valski found it in the breeding-season in S.E. Mongolia; and 

 in Dresser's and Lord Tweeddale's collections are skins from 

 Japan. It has been obtained on migration at St. Michael's, 

 in Norton Sound {Dall & Bannister, Trans. Chicago Ac. Sc, 

 i. p. 278), and as far west as Heligoland {Gaetke, Ibis, 1862, 

 p. QQ). Swinhoe (Ibis, 1860, p. 53) describes this species as 

 passing in great numbers through Amoy in spring and autumn, 

 and notices (Ibis, 1866, p. 295) its abundance in the island of 

 Formosa in October. It has not been found wintering so far 

 west as Calcutta or Ceylon ; but I have identified skins from 

 Labuan, N.W. Borneo [Low in Brit. Mus. and Mus. H. See- 

 bohm), Gilolo [Wallace in Brit. Mus.), Timor [Wallace in 

 Brit. Mus.), Flores and Ternate [Wallace in Mus. Lord 

 Tweeddale), Batchian [Wallace in Brit. Mus.), and South 

 Andaman Islands [Warcllaw Ramsay in Mus. Lord Tweed- 

 dale). On the mainland it has been found at Malacca 

 {Maingay in Mus. Lord Tweeddale) and in the Tenasserim 

 provinces (Stray Feathers, ii. p. 478). 



The very small bastard primary of this species serves to 

 distinguish adults from every other species of the genus, ex- 

 cept P. sihilatrix, with which bird it cannot possibly be con- 

 founded. Birds of the year approach P. xanthodryas very 

 closely, but have not quite such a large bastard primary, nor 

 quite such a large bill. 



I have not been able to obtain any authentic information 

 respecting the nest or eggs of this species. 



2. Phylloscopus xanthoduyas, Swinhoe. 



Phylloscopus xanthodryas, Swinhoe, P. Z. S. 1863, p. 296, 



Bill large, under mandible pale. 



Upper parts yellowish olive-green. Superciliary streaK green- 

 ish yellow. 

 Head the same colour as the back. 



