exhibit a new migration unnoticed by the writers, 

 who supposed they never were to be seen in any of 

 the southern counties. 



One of my neighbours lately brought me a new 

 Salicaria, which at first I suspected might have 

 proved your willow-lark;* but, on a nicer examina- 

 tion, it answered much better to the description of 

 that species which you shot at Revesby, in Lincoln- 

 shire. My bird I describe thus : — '' It is a size less 

 than the grasshopper-lark; the head, back, and cov- 

 erts of the wings of a dusky brown, without those 

 dark spots of the grasshopper-lark ; over each eye is 

 a milkwhite stroke ; the chin and throat are white, 

 and the under parts of a yellowish white : the rump 

 is tawny, and the feathers of the tail sharp-pointed ; 

 the bill is dusky and sharp, and the legs are dusky ; 

 the hinder claw long and crooked." The person 

 that shot it says that it sung so like a reed-sparrow 

 that he took it for one ; and that it sings all night : 

 but this account merits farther inquiry. For my 

 part, I suspect it as a second sort of locustella, hinted 

 at by Dr. Derham in *' Ray's Letters." He also pro- 

 cured me a grasshopper-lark. 



The question that you put with regard to those 

 genera of animals that are peculiar to America, viz. 

 how they came there, and whence ? is too puzzling 

 for me to answer; and yet so obvious as often to 



* For this Salicaria, or sedge-warbler, see Letter XXVI. August 30, 

 1769. 



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