44 REPOKT ON THE MIGRATION OF BIRDS. 



birds; enormous passage on 20th and 21st, easterly, hot and 

 fine; through September, and an astounding rush from the 

 12th to the 15th; last, Oct. 1st and 2nd. 



11. titys, Black Redstart. — One, as reported by Mr. Gurney, 

 shot at Blakeney, about the middle of October, by Mr. Seebohm. 

 Heligoland, Oct. 23rd, some ; 25th, less. Three to four weeks 

 later in migration than Common Redstart. 



Cyanecula suecica, Arctic Bluethroat. — Cley and Blakeney (as 

 observed by Mr. F. D. Power), September 8th, W.N.W., one ; 

 11th, E. to N.N.E., one shot showing red spot fairly well; 12th, 

 E. to N., eighty to one hundred, also many Redstarts, — examples 

 obtained were immature, and in the proportion of six males to 

 one female ; 13th, E.N.E., about four dozen left on banks ; 15th, 

 E., eight or ten; 16th, S.E., and later N.E., four or five. Spurn, 

 Sept. 15th, two seen, one shot ; 18th, three shot and others seen. 

 Isle of Thanet, Sept. 15th, two seen on some arable land by 

 Lord Clifton. Heligoland, Aug. 31st, some young ; Sept. 1st 

 and 3rd, pretty numerous ; 9th and 10th, very many ; 11th and 

 12th, very great numbers, and less to 18th ; 19th and 20th, 

 many. It is interesting to compare these dates with the arrival 

 on the English coast. 



Erithacus rubecula, Redbreast. — Spring : Farn Islands, 

 March 11th, several. Longstone l.h., April 28th, E.N.E., two. 

 Autumn : At several stations between the Farns and mouth of 

 Thames ; first at Shipwash l.v. August 14th, large numbers at 

 noon to W. ; the last at Hasborough l.v., Nov. 12th, one at 

 night on deck. Heligoland, Sept. 19th, a few; 21st, great 

 many, and on to the end of month, and at intervals through 

 October to November 12th, rush, if any, Oct. 12th. Migration 

 appears to have ceased at the same date both on- English coast 

 and at Heligoland. 



Sylvia cinerea, Whitethroat. — Heligoland, Aug. 19th, young, 

 the first, very red; 21st and 23rd, a few ; Sept. 11th, some. 



S. atricwpiUa, Blackcap. — Spring : Farn l.h. April 29th, 

 several. Autumn : Thanet, Sept. 3rd to 5th. Heligoland, 

 Oct. 12th, a few. 



8, hortensis, Garden Warbler. — Spring : Malmo, Sweden, 

 May 14th. Autumn : Thanet, Sept, 3rd to 13th. Spurn l.h., 

 17th, S. E., one struck and killed, several seen *on following 

 day ; many Redstarts, Pied Flycatchers, and Bluethroats, also 



