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ALLEN’S NATURALIST’S LIBRARY. 
variety in the eggs of the Blackcap, is seldom found, and there 
is only a single specimen of a red egg in the British Museum, 
which was taken by Mr. Gould at Taplow, and is, therefore, 
doubtless authentic. The ground-colour is white, or stone- 
colour, with plentiful spots and blotches of greenish-brown, 
the underlying grey blotches being generally subdued, but in 
some cases prominent and clouding the larger end, though in 
some rare instances the markings are very few and scattered. 
Axis, o’7-o' 85 inch ; diam, o - 55-o'6. 
THE FURZE-WARBLERS. GENUS MELIZOPHILUS. 
Melizophilus, Leach, Syst. Cat. Matnrn. and Birds, Brit. Mus., 
p. 25 (1816). 
Of the genus Melizophilus , two species are known, the 
English M. undatus , and the Sardinian Warbler, M. sardus. 
Both of these birds resemble Whitethroats in form, especially 
the species of Sylvia of Southern Europe, such as S.subalpina , 
and they lay eggs of a Whitethroat type, but they may con- 
veniently be separated from the genus Sylvia on account of 
their longer tail, which exceeds the wing in length. 
THE HARTFORD WARBLER. MELIZOPHILUS UNDATUS. 
Motadlla undata , Bodd, Tabl., pi.. Enl., p. 40 (1783). 
Melizophilus provindalis, Macg., Br. B. ii., p. 383 (1S39); 
Lilford, Col. Fig. Brit. B., pt. iv. (1887). 
Melizophilus undatus, Newt. ed. Yarn, i., p. 398 (1873); 
Dresser, B. Eur.,' ii., p. 441, pi. 69 (1873); B. O. U. List 
Br. B., p. 14 (1: 83). 
Sylvia provindalis, Seeb., Cat. B. Brit. Mus., v., p. 31 (1881); 
id. Br. B., i., p. 414 (1883). 
Sylvia undata, Saunders, Man., p. 53 (1889). 
Adult Male. — General colour above dark slaty-grey washed 
with brown ; the crown, sides of the face and sides of neck 
slaty-grey like the back, this colour also extending on to the 
sides of the upper breast; wing-coverts like the back; the 
quills sepia-brown, edged with lighter brown, rufescent on the 
margins of the secondaries ; tail-feathers blackish, edged with 
slaty-grey, the outer feather white on the outer web, and edged 
with white round the tip of the inner web ; under surface of 
