270 STUDIES IN BIRD-MIGRATION 



rendered its determination possible — namely, by a 

 comparison with specimens in the unrivalled collection of 

 Palaearctic Birds in the Tring Museum. This Interesting 

 specimen has been most kindly presented to the collection 

 of birds in the Royal Scottish Museum by Mr George 

 Girdwood of Dumbarton. 



Short-toed Lark, Calandrella bi^achydactyla. — The 

 visit and capture of this interesting waif, on 20th Sep- 

 tember 1904, has already been described on pp. 255-6. 



Pied Wagtail, Motacilla lugubris. — Appears to be 

 an uncommon visitor, and is, no doubt, in some cases 

 not discriminated from the next species. 



It is recorded for April (20th earliest) and May (19th 

 latest). An adult male, obtained during the former 

 month, was sent to me. 



In autumn the references to its appearance are from 

 August (nth earliest) to September (15th latest). 



White Wagtail, Motacilla alba, — A regular bird of 

 passage in the spring and autumn, and one of the 

 commonest migrants, being observed in large parties at 

 both seasons. 



The spring records range from 2nd May to 3rd June ; 

 and those for autumn, from loth August to 8th October, 

 being most numerous during September. 



[Grey - headed Wagtail, Motacilla thunbergi 

 ( = borealis), — The appearance of this species on 20th 

 September 1904 has already been fully treated of 



(p- 256).] 



Meadow- Pipit, Anthus pratensis. — Though one of 

 the commonest visitors on passage during the autumn, 

 this bird seems to have practically escaped notice, at 

 least in the schedules, for spring. 



There is only one record for spring — namely, 20th 



