434 Dr. E. Hartert on Birds from 



blackish, lower yellowish with blackish tip. Iris dark 

 brown." (Nos. 83, 109, 365.) 



I have called this species Phylloscopus fuscutus, as it 

 can hardly be placed in the same genus with Lusciniola 

 melanopoyon. The latter is a close ally of the Reed- Warblers, 

 and not very different essentially from them, while f meatus 

 seems to be a Phylloscopus with a somewhat different wing- 

 formula. It requires a close study of these birds to decide 

 upon their genera; all that I can say at present is that fus- 

 cutus is either a Phylloscopus or, if generically separable, 

 might be called Hcrbivocula, but not Lusciniola. 



[This bird sings upon shrub-tops in the scrub. It utters 

 its notes rapidly, strongly, and sweetly, the song being akin 

 to that of Acroccphalus in Australia, but not so powerful.] 



49. Phylloscopus trochilus (L.) (? subsp.). 

 Motacilla trochilus Linnaeus, Syst. Nat. ed. x. p. 188 (1758 : 



" Habitat in Europa." Typ. loc. Sweden). 



S ? ad. Bulun, 16, 17. vii. 1903. (Nos. 287, 288,289, 

 296, 295.) 



These examples are very pale and might form another sub- 

 species. 



50. Phylloscopus borealis (Bias.). 



Phyllopneustt borealis Blasius, Naumannia, 1858, p. 313 

 ("Merd'Ochotsk")- 



£ ad. 20 miles north of the Arctic Circle, 4. vi. 1903. 

 (No. 176.) 



3 $ ad. Olekminsk, 100 miles above Yakutsk, 18. vi. 1903. 

 (Nos. 87, 103, 107.) 



$ ad. 100 miles north of Yakutsk, 29. vi. 1903. (No. 162.) 



? ad. Between Bulun and Gigansk, 20. vii. 1903. (No. 320.) 



5 ad. Upper Lena River, 9. vi. 1903. (No. 43.) 



[This species fills the woods with soug almost to the ex- 

 clusion of other birds, which certainly are not plentiful here at 

 this time of the year. When flying it has a chattering note.] 



51. Phylloscopus superciliosus (Gm.). 



Motacilla superciliosa Gmelin, Syst. Nat. i. p. 975 (1788). 



6 J ?. Olekminsk, Yitim, Bulun. (Nos. 77, 286, 366, 



