14 THE ZOOLOGIST. 



immigrants to Ireland. In their plumage they resemble the 

 British form of Bobin, but inasmuch as the movement took 

 place as early as mid-August and ceased in mid-September, and 

 inasmuch as the east to west or north-east to south-west inter- 

 British movement is usually regarded as being correlated with 

 seeking a more genial climate in cold winter weather, I am not 

 inclined to favour the view that this was the route taken either, 

 (c) As emigrants* from Ireland seeking more southerly quarters 

 than the British Isles, and travelling in companionship with the 

 south-bound emigrants which accompanied them to the lantern. 

 It is most likely that this was the route they were taking, but 

 how far they might have flown, had they escaped all vicissitudes 

 en route, I am not prepared to say. 



Post-mortem examination showed that they were all imma- 

 ture females ; all in plump condition, with much fat under the 

 skin ; and all, save one, had not a vestige of food in the gizzard. 

 The one whose gizzard contained sparse remains of marine 

 crustaceans was the one collected on the rock at 9.30 a.m. on 

 September 14th, 1912. This food, foreign to the Eobin's taste 

 when on land, was no doubt picked up on the rock on the same 

 morning that the bird arrived. 



* According to Saunders (Man. Brit. Birds, 2nd edit., 1899, p. 37) young 

 Robins are, to some extent, driven away by their parents and forced to 

 emigrate. 



