22. 
Ae 
24. 
2y. 
26. 
27. 
28. 
BIRDS. 21 
not, however, quite so far north, and it seems well estab- 
lished that the nightingale is gradually extending its range 
up the vale of York and along the coast. 
Early in the present century Doncaster was regarded by all 
writers as the most northerly locality which it visited annu- 
ally, until in 1844 Mr. Thomas Allis showed that it occurred 
regularly much further north, and in two exceptional in- 
stances to as high a latitude as five miles north of York. 
Baldersby and Bagby, which must now be regarded as its 
northern outposts, are 21 miles N.W. of York, or 15 and 
20 miles respectively north of the latitude of that city. 
Sylvia rufa (Bodd.). Whitethroat. 
Summer visitant, generally distributed, abundant. Arrives 
late in April, departing in August and September. 
Sylvia curruca (Z.). Lesser Whitethroat. 
Summer visitant, generally distributed, though in varying 
numbers, and not nearly so abundant as S. rufa. Arrives 
during the last week of April, and departs in August and 
September. 
Sylvia orphea Zemm. Orphean Warbler. 
Accidental visitant from Central and Southern Europe and 
Northern Africa, of extremely rare occurrence. 
Wetherby, male seen, female shot, July 6, 1848 (Milner, 
ZooL, 1849, p. 2588). 
Notton Wood, near Wakefield, a nest with four eggs taken, 
June, 1864 (Harting, Field, April 22, 1871, p. 321). 
Sylvia atricapilla (Z.). Blackcap. 
Summer visitant, somewhat irregularly distributed over the 
county, but not very numerous. __Has in several instances 
occurred in mid-winter. Arrives late in April 
Sylvia salicaria (Z.). Garden Warbler. 
Summer visitant, generally distributed, common. Arrives 
early in May, leaving in September. 
Sylvia nisoria Zechst. Barred Warbler. 
Melizophilus undatus (Sodd.). Dartford Warbler. 
Casual visitant, observed in one locality only—the Rivelin 
Valley—in the extreme south. Here Mr. Charles Dixon, 
who is well acquainted with the bird, has several times seen 
