or Willow-Warblers. 
71 
Ibis, 1873, p. 61). It has been shot at Mesen ( Piottuch in 
Mus. H. Seebohm) and on the Petchora {Seebohm and Harvie 
Brown , Ibis, 1876, p. 216). Skins collected by Dr. Dy- 
bowski near Lake Baical are common in collections. Mid- 
dendorff ( 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 [Ball & Bannister , Trans. Chicago Ac. Sc. 
i. p. 278), and as far west as Heligoland ( Gaetke , Ibis, 1862, 
p. 66). 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 {Wardlaw 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. sibilatrix, 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 xanthodhyas, 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 bach . 
