22 RESIDENTS AND MIGRANTS. 



with the rules of zoological nomenclature laid down 

 by the British Association. Mr. Sharpe has shown 

 (' Ibis,' 1868, p. 295) that, as the Long-tailed Titmouse 

 of Scandinavia (described by Linnaeus as Parus cau- 

 datus) differs from the British species in having a 

 white head, the latter cannot bear the name caudatus, 

 but should be distinguished as rosea of Blyth, that 

 name being the next in order of precedence. The 

 white-headed form, however, occasionally occurs in 

 this country. I have seen two specimens, as else- 

 where recorded*, which were taken in the north of 

 England ; and Mr. Gatcombe has lately seen one in 

 Somersetshiref. 



BEAKDED TITMOUSE. Panurus biarmicus (Linnaeus). 



Resident only in the eastern counties of England, 

 where it was formerly much more abundant. It has 

 occurred accidentally in Yorkshire (Waterton), Devon 

 (Brooking Rowe), Cornwall (Rodd), and the Isle of 

 Wight (A. G. More). It appears by common con- 

 sent to have been classed with the Tits ; but its affinity 

 to these birds is very remote. In some respects it is 

 distantly allied to Emberiza schceniclus ; but its more 

 direct affinities appear to be with the species of the 

 American genus Ammodramus, whose mode of life is 

 very similar J. 



* The Birds of Middlesex, p. 59. 

 t The Zoologist, 1872, p. 2943. 



J See remarks on the internal structure of the Bearded Titmouse, 

 by Mr. Tomes, published in ' The Ibis,' 1860, p. 317. 



