SYLVIAD.E. 105 



dividual Algerian specimens, than between" the ordinary 

 African and Greek types. 



o. S. horealis, ( Phyllopneuste horealis, Blasius,) is a 

 new species, intermediate between the P. Javanica of 

 Horsfield, and S. icterina of Vieillot. The following is 

 Professor Blasius' account of this bird, from Naumannia, 

 1858. I had intended to have deferred any account of 

 the species until the end of the work, but as it may 

 by that time lose its present claim to specific distinction, 

 I will give a short abstract of Professor Blasius' des- 

 cription. The bird was killed in Heligoland: — 



This bird forms with P. Javanica a natural group 

 under the Foliage Warblers. Upper part of the body 

 and the edges of the wing and tail feathers yellowish 

 grass green; vertex gradually darker coloured, grey 

 green. The tail feathers slender, and have their greatest 

 breadth a fourth from base; the inner web here turns 

 in a disproportionate manner towards the shaft. The 

 whitish tips of the first tail feathers are broadest near 

 the point of the shaft on the inner web. In the above 

 characters it diifers entirely from P. Javanica. The 

 under part of both species is white along the middle, 

 with a faint brimstone yellow flush. Feathers of the 

 sides of the head and the front part of the neck are on 

 the tips and edges clouded with grey, while in P. Ja- 

 vanica these parts are clear yellowish white. The flanks 

 shade ofl" into the colours of the back, with greenish 

 grey. The small first primary is only a little longer 

 than the upper wing coverts, third and fourth from point 

 of wing, fifth larger than sixth, smaller than second. 

 Tail tolerably straight, two middle feathers somewhat 

 lengthened; beak dark horn blue colour, with yellow 

 flesh-coloured edges. Feet bright-coloured in Javanica, 

 brown grey; in Borealis bluish green. 



