SYLVIAD.^. ■ 107 



11. S. fruticola, IS'aumann, (xiii., p. 453.) — Supposed 

 to be the young of >S'. nigrifons, itself a not established 

 species. It is with the last evidently a variety of S. 

 arundinacea or S. pal'mtris. 



12. ;S'. rubricapilla, Landbeck, >S'. Naumanni, Miiller. 

 — Has been determined as a species by M tiller, who 

 refers it to the above figure in Naumann's work, xiii., 

 p. 411. It is distinguished from Atricapilla by the male 

 having a red head like the female. The species has 

 not been satisfactorily determined. 



13. S. oh s euro cap ilia — Calamoherpe obscurocapilla, Du- 

 bois. — Is a species figured, with its nest and eggs, and 

 described as new by Dubois, in his beautiful work, 

 which he has kindly sent to me, the "Birds of Belgium." 

 It is q[uite possible that this species will prove distinct, 

 though in the absence of specimens for examination I 

 do not feel competent to give a stronger opinion. It 

 appears to have been first discovered by M. le Vicomte 

 de Spoelberg, in 1854. It is, says M. Dubois, closely 

 allied to the Marsh Warbler, {S. palustris,) with which 

 in fact it has long been confounded. From this however 

 it differs in the male having a dark head, which is never 

 observed in Palustris. It appears to be a great mimic. 

 The nest is similar to that of the Garden Warbler in 

 form, and of the Grasshopper Warbler in construction. 



14. S. arigonis. Hypolais arigonis, A. Brehm Jils. 

 Algemeinen deutschen naturhistorischen Zeitung, No. 

 161, p. 467, tome 3. — This is said to be a good species 

 by M. Dubois. If it maintains this character I shall 

 endeavour to give a notice of it in the Supplement. 



The above include all, I believe, of the real or sup- 

 jDosed and doubtful species, which have been thought 

 by various authors to have had more or less claim to 

 admission into the European list of birds. 



