1. sTLviA. ; 



b". Bill Acrocephaline, pale imdemeath 

 (see woodcut, p. 87). 

 a'". Greater wiug-coverts -with pale 



tips 2. Phylloscopus, p. 37. 



. Greaterwiug-coverts without pale 



tips •••.•■•■. 2- Hypolais, p. 75. 



6. Axillaries bull', white, grer, or brown. 

 c". Uastard jiriiuary cousiderably less 

 than half ihe leugtii of the second. 

 c'". Bastard primary extending- con- 

 siderably beyond the pi^imary- 

 coverts. 

 a^. Bill Acrocephaline, jjale under- 

 neath. ]S"o while on outside 



tail-leathers 3. Hypolais, p. 75. 



b . BjII tfylviine, generally with more 

 or less dark underneath (see 

 woodcut, p. 4;. Occasionally 

 with white on outside t<ail-fea- 



thers 1. Sylvia, p. 3. 



a'". Biwtard primary not extending- 

 beyond the primary-coverts, 

 c*. Bill Sylviine, with more or less 

 dark underneath. Tail nearly 



^.^■t'" ' 1. Sylvia, p. 3. 



a . Bill Acrocephaline or Phyllo- 



scopine. 



«*. Outside tail-feathers less than 



three fourths the length of 



the longest. Kictal bristles 



nearly obsolete o. Locustella, p. 107. 



6'. Outside tail-feathers more 



than three fourths the length 



of the longest. Rictal 



bristles fairly developed. 



c°. Outside tail-feathers less 



tlian O-Jo inch shorter than 



the longest. Bill Acro- 



cephahne, jale underneath 3. Hypolais, p. 75. 

 b^. Outside tail-feathers more 

 than 0-25 inch shorter than 

 the longest. Bill Acroce- 



,., Ti T pl''''li"e or I'hylloscopiue .. 4. Aceocephaltjs, p. 87. 



a . Bastard pimjary half the length of 



, .,, ., t^e second or nearly .-o 6. LusciNiOLA, p. 120. 



6. lail containmg only ten feathers 7. Cettia, p. 133. 



1. SYLVIA. 



Tvpe. 



bylvia. Scop. Ann. i. Ili'sf. JS'af. p. 154 (1700) S. cinerea P 



Silvia, Ciivier, Lequns d'Anat. Comp. Sec. I'abk, C'lasse 



des Ous. (1799) S. cinerea ? 



Curruca, Koc/i, Si/st. hater. Zool. p. 153(1810, e.v 



licchstein) S. cinerea? 



Melizophilus, Leach, Cat. Mamm. {yc. Brit. Mus. 



p. 25 (1810) S. provincialis. 



Aedon, Bo.e, Isis, 1820, p. 972 S. gakctodes. 



b2 



