398 SIBILATRIX. CHIRPER, 



Plumage soft and blended, the feathers broadly ovate and 

 rounded, with loose filaments. Wings of moderate length, 

 a little curved, broad, semi-ovate ; quills eighteen ; the first 

 primary about a fourth of the length of the second, which is 

 a little shorter than the third, the rest of the primaries gra- 

 dually diminishing, and with the secondaries rounded. Tail 

 rather long, broad, graduated, nearly straight, the feathers of 

 moderate breadth, and weak. 



Of this genus only one species, " the Grasshopper Warbler," 

 is found in Britain. 



