the Banks of the Lena River. 445 



4- vi. 1903 (Nos. 178, 180), at Bulun, 5, 8, io, 17. vii. 

 1903 (Nos. 183, 216, 244, 290), and Olekminsk, 6. viii. 

 1903 (No. 377). 



If this form actually occurs during the breeding-season, to- 

 gether with Acanthis flammea jlammea, we shall have, though 

 reluctantly, to recognise it as a species (cf. Vogel d. pal. 

 Fauna, i. pp. 77-80). It is, however, significant that 

 Mr. Hall saw flocks of Redpolls on migration as early as 

 July 20th. Apparently he did not distinguish between the 

 two forms of Redpolls, so that the following notes may refer 

 to either of them. 



[A nest containing unfledged young was found placed in a 

 fir tree on July 17th, at Bulun. One bird had two large 

 larva?, one dipterous fly, and three mosquitoes in its bill. At 

 Gigansk, on July 20th, we saw a stream of Finches travel- 

 ling southwards. That they were on migration there was 

 no doubt. The little flocks numbered from twelve to twenty 

 birds, with stragglers or newcomers coming in between each 

 flock. They appeared to be mostly of this species as far as 

 I could discover. On August 6th, at Olekminsk, I found it 

 in flocks of fifty birds.] 



80. Perisokeus infaustus sibericus (Bodd.). 



Corvus sibericus Boddaert, Tabl. PL Enl. p. 37 (1783: ex 

 Daubentou & Buffon). 



S ? . Yakutsk, 23. vi. 1903. (Nos. 130, 132.) " Bill 

 and feet black." 



81. NuCIFRAGA CARYOCATACTES MACRORHYNCHA BrellUl. 



Nucifraga macrorhynchos Brehm, Lehrb. Naturg. europ. 

 Vog. i. p. 103 (1823 : " Gebirgswalder des mittl. nordl. 

 Europa und Asien." Type a Siberian migrant). 



Ad. & juv. Ustkutsk, 12. vi. 1903. (Nos. 39, 65, 66, 68.) 



2 S ad- Nahtyuskaja, 7. viii. 1903. (Nos. 381, 386.) 



One of the last two males shews distinct white edges to the 



inner primaries and secondaries, thus approaching N. c. kam- 



tschatkensis of Barrett-Hamilton. I find that the white 



triangular spots on the wing- coverts are also seen in some 



