ON THE FURZE WARBLERS OF FRANCE. 299 
S. undata has the under surface conspicuously paler and 
more vinous, with a greyish wash on the flanks, and the throat- 
feathers are always more distinctly tipped with white. In 
winter the feathers on the under parts are heavily bordered 
with white. 
The distribution of the various races appears to be roughly 
as follows :— 
Sylvia undata (Boddaert). Northern shores of the Mediter- 
ranean basin, east to Italy. 
S. undata aremoricus, de Palluel. The Atlantic coasts from 
Finistére and North-west France to Spain (?) (Portuguese 
specimens seem to agree perfectly with those from Western 
France). 
S. undata toni, Hartert. North-west Africa. (A slightly 
smaller race.) 
S. undata dartfordiensis, Latham. Southern England. 
to 
S 
to 
