CORRESPONDENCE. 87 



merable ; indeed for one adult, I should think there were at least five or six 

 young individuals. 



Manks Shearwater, Puffinus Anglorum. — The Manks Shearwater visited us in 

 considerable numbers at the same time, but did not associate with the Gulls. 

 Its flight, which is very peculiar, is best described by its name, Shearwater. It 

 is not unlike the dipping flight (for I know no better name for it) of the Wood- 

 pecker, but the dip is much longer. Its food appears to be dead animal matter, and 

 as it is always in excellent condition, I suppose it finds it in abundance. Though 

 its feet are webbed, and placed in a very favourable position to assist its progres- 

 sion under water, I think it never dives ; for when only slightly wounded, and 

 endeavouring to escape, it makes no attempt at diving. I have, moreover, 

 watched it when feeding, some hundreds of times at least, and never saw it go 

 beneath the surface ; it merely touches it, and then rises again. The general 

 opinion is, I believe, in favour of its diving partially. It is an excellent swimmer. 



March 13, 1837. 



CORRESPONDENCE. 



To the Editor of the Naturalist. 



Sir, — I have to make the following corrections to my last paper (Vol. I. p. 

 $49) ; how the errors occurred, I am at a loss to know : — " Crambus, n. sp. on 

 Parley Heath, is sylvellus of Hubner, and new to Britain." The reference to 

 Donovan about the Fulgora is not quite correct, as I have lately discovered, by 

 turning to his work. I have also procured Yeats's Institutions, which he 

 quotes. Yeats says : — " Two different species have been caught in this coun- 

 try, one by the author of that useful and elegant work, Flora Anglica (Mr. 

 Hudson), the other by my friend Mr. Gray." Wales is omitted ; but I think it 

 likely to be correct, as Hudson collected much there. I have a Tortrix exca- 

 vana^ with all the markings of emargana ; and, were it not for the colour, I 

 should pronounce it that species. I have one of Littorana with a red splash, 

 closely resembling tricolorana, with the black spots very large, &c. I also possess 

 an irrorana, with the black spots of littorana. These I think are hybrids, if 

 those species are actual species. 



• I am, Sir, yours, &c, 



April 6, 1837. J. C. Dale. 



