ON BIRDS FROM THE NETHERLANDS, 41 
Uria troille (L.) var. ringvia Briinnich. 
Of the ringed variety three specimens, two males and 
one female, in winter plumage, shot near Texel 12 Decem- 
ber 1910 and 22 January 1911, were sent to our Museum. 
It is remarkable that this variety is rather rare among the 
guillemots on our coast. 
Cepphus grylle (L.). 
The Museum received a female in winter plumage, shot 
16 January 1911 near Texel on the Marsdiep. This is the 
third example in our collection and the fifth known to 
have been killed in the Netherlands. 
Fratercula arctica (L.). 
An adult male, caught on Texel 5 January 1911, came 
in the possession of the Museum. 
Picus martius L. 
Mr. R. van Eecke, at present assistant in the Entomo- 
logical Department of our Museum, presented to our col- 
lection an adult female of the black woodpecker, which 
has been shot at Deurne, province Noord-Brabant, 15 No- 
vember 1910. The Museum possesses now two specimens 
killed in our country. In the latter years the bird has been 
observed more frequently. 
Motacilla flava thunbergi Billberg. 
Also this year I received again 10 specimens of the 
northern yellow wagtail, caught 15 and 16 May near 
Harderwijk, province Gelderland, together with some spe- 
cimens of the common yellow wagtail, Motacilla flava L. 
Anthus richardi Vieillot. 
A moulting female was caught on October 11th 1910 
at Harderwyk and purchased for the collection. 
Notes from the Leyden Museum, Vol. XXXIV. 
