326 Mr. H. Seebohm on the Ornithology of Siberia. 
midst of a small party of Lapp-Tits. What few birds there 
are in these vast solitudes are very sociable. I generally 
found the Lapp-Tits accompanied by a pair of Pine-Grosbeaks, 
and occasionally by a pair of Nuthatches. The Nuthatch of 
the Yen-e-say' cannot be separated specifically from the com¬ 
mon European form. It is undoubtedly a whiter form. The 
forehead is whiter, and the flanks are much less rufous. These 
paler forms are characteristic of Siberia, and have given rise 
to many new synonyms. Thus the Siberian form of Picus 
tridactylus has been called P. crissoleucus by Brandt, that of 
Parus cinctus P. grisescens by Dresser; and the pale form of 
Sitta europcea is the S. uralensis of Lichtenstein, the S. 
asiatica of Gould, and the S. roseilia of Bonaparte. 
Dresser, in his Birds of Europe,^ describes. the legs of S. 
europcea as plumbeous grey,^^ in contradistinction to those 
of S. ccesioj which he describes as pale dull brown.'^ This 
does not at all agree with my observations in Siberia. The 
following note was written on the spot, with several fresh- 
killed birds of each of the two species referred to before me :— 
The Nuthatch and the Titmouse which are found here are 
remarkably alike in their general distribution of colour, but 
difier considerably in the bill and feet. The feet of the Lapp- 
Titt are lead-colour, almost black. The bill of the Nuthatch 
is dark lead-colour above, and pale lead-colour below, almost 
the colour of the back.^^ The feet, on the other hand, seem 
to have been painted with the same colouring matter as the 
under tail-coverts, and are pale chestnut-brown, with the soles 
a dirty yellow. 
CucuLUS cANORus, Linn. 
I first heard the Cuckoo on the 5th June, and shot a male 
a few days later. I did not myself hear this bird further 
north than 67°, but was assured that it was not unfrequent 
at Doodin'-ka, in lat. 69°, nearly at the limit of forest-growth. 
CuCULUS HIMALAYANUS, VigOrS. 
On the 15th of June a second species of Cuckoo presented 
himself, with an entirely difierent voice to our bird, a gut¬ 
tural and hollow-sounding hoo, not unlike the cry of the 
Hoopoe. This cry can be heard at a great distance, and is 
