32 REPORT ON THE MIGRATION OF BIRDS. 



Jidi) debatable ground, 



July 5th, Pentland Skerries, a flock 8.20 p.m. ; mod. E., fog and 

 showers. 



July 6th, Pentland Skerries, several flocks all day ; light S., haze. 

 July 7th, Pentland Skerries, several flocks all day flying E.; mod. 



S.E., haze. 

 July 18th, Pentland Skerries, a few flocks all day ; mod. N,W., clear. 



July 25th, Pentland Skerries, continuous flocks all day; mod. 

 N.E., clear. 



July 26th, Pentland Skerries, continuous flocks all day flying E. 

 and S.E. ; fresh N., haze. 



The last two entries appear to me to indicate decision in 

 commencing the autumn migration. 



Aug. 15th, Dunnet Head, rock birds leave about this time. 



Aug. 10th, Isle of May, all rock birds left, except a few Kitti- 

 wakes; heavy w^esterly gale on 9th. 



Oct. 23rd, Pentland Skerries, flocks flying E.; strong W., showers. 



Nov. 2nd, Pentland Skerries, large flocks, noon, flying S.E. from 



S.W. (?). 

 Nov. 27th, Isle of May, abundant in sea along with Gulls; 



"Garvies," i. e., Chipea sprattus, abundant (J. A. H. B.). 

 Dec. 20th, Isle of May, large numbers ; fresh W., haze. 

 Dec. 27th, Isle of May, large numbers ; S.W., haze. ^ 



This completes our data of Guillemots and Kazorbills, to 

 which the whole of the above records refer for 1883 ; and I think 

 it shows pretty plainly the life-history of these birds, at least in 

 some important particulars. A wider appreciation can be arrived 

 at if similar tabular returns come in from other salient points of 

 observation, such as Isle of May, Bell Eock, and one or two 

 stations on the east coast ; and Cape Wrath, Butt of Lewis, 

 Monach Isles, and Barra Head on the w^est coast ; and also for 

 summer migrations, especially such stations as Island Ghlais, 

 Skerryvore, and Dhuheartach, ^nd others on the inner line of 

 stations of the west coast. 



These data are minutely detailed here this year, because I 

 have felt more at liberty to do so, owing to the light returns of most 

 of our land birds, thus having more space than usual at command. 



Further remarks, should such occur to us, will appear in the 

 " General Observations," which I withhold till the close of the 

 West Coast Pteport. 



