PALLAS' S LOCUSTELLE. 37 



INSECTIVOR.E. 



Family SYLVIID^. 



Genus Locustella. ( 'Kaup.J 



PALLAS'S LOCUSTELLE. 



Locustella certhiola. 



Locustella, certhiola, Gould. 



Motacilla certhiola, Pallas; Zoog., i., p. 509, No. 141. 



Sylvia certhiola, Temminck: Man., i., p. 187. 



" " m Bree; first Edition. 



Calamoherpe certhiola, Blasius; Naumannia, 1858. 



Bee-fin Trapu, Of the French. 



Specific Characters. — Beak strong; superior mandible black; the plumage 

 of the upper parts varied with numerous spots; all the quills of the tail 

 are terminated below by a large ashy blotch; posterior claw much curved, 

 and longer than the toe. Length five inches. 



Tms bird, closely allied to the Grasshopper Warbler, so well known 

 to the naturalists of Great Britain, was introduced into the European 

 Fauna by Pallas, in his "Fauna Rossica," as Turdus certhiola, and 

 was described by him afterwards under the name of Motacilla certhiola. 

 It was subsequently introduced into the Manual by Temminck as 

 Sylvia certhiola, who has given a very clear description of the bird, 

 and a careful comparative diagnosis between it and our British 

 locustella, or, as it is now called, Locustella noevia. 



It was erased from the European list by Schlegel, and is left out 

 by Degland upon this authority. 



It has however recently come to light in that singular island 

 Heligoland, where so many new birds, especially American forms, 

 have been added to the European list. It was found by Herr Gatke, 



