Letters

S I R S , -- W i t h reference to t h e article on " The Breeding-habits of t h e Dartford Warbler," and t o t h e statement on page 218, I have never seen a Dartford Warbler's nest in England, a n d know nothing of their habits in this country. I n t h e south of Spain erythrism occurs in a large number of eases: birds were shot from t h e nests or caught on them. On t h e other hand, I have n o t y...