40 A. F. CEOSSMAN — KOTES OX BIRDS 



Heeeing-Guli (Lams argentatus). — Eight of these gulls appeared 

 at the Reservoii's on September 16th. Mr. M. R. Pryor informs 

 me that flights of gulls, some of which were probably of this 

 species, passed over Weston Manor at intervals from the beginning 

 of September to the end of November. They were generally flying 

 nearly due south, and usually went over just before sunset. I saw 

 an immature specimen of this bird stuffed in the head-keeper's 

 cottage at Ashlyns, near Berkhamsted ; the owner informed me 

 that he had shot it about a year and a half ago in that neigh- 

 bourhood. 



GrEEAT Black-backed Gull {Larus marinus). — Pour of these gulls 

 were seen at Tring on September 9th. These biixls occur tliere at 

 intervals, as also does the lesser black-backed gull. Some of the 

 gulls seen by Mr. Prior passing over Weston Manor were apparently 

 of the black-backed species. 



KiTTiwAKE [Rissa tridactyla). — Mr. Lucas tells me that a kitti- 

 wake was picked up in the Priory Garden, Hitchin, in January, 

 and was preserved by Stratton, of that town. This gull has only 

 been recorded in Hertfordshire on about four other occasions, the 

 last being a bird seen by me flying over Berkhamsted Common. 



Geeat Noetheekt Divee {^Colymbus glacialis). — Street informs me 

 that a great northern diver appeared at the Reservoirs on January 

 12th, but does not mention whether it was obtained. There is 

 always the chance with these birds of wrong identification, unless 

 they are actually procured, and therefore, although Street is a 

 most accurate observer, I must put a query against this record. 

 I mentioned in my report for 1896 the various occurrences of this 

 bird in Hertfordshire. 



This completes my notes on various birds which occurred in 

 Hertfordshire in 1897, and I now give the annual table of the 

 arrival and departure of the summer and winter migrants. 



Aeeival and Depaetuee of Migeants. 



Summer Migrants. 



Species. Locality. Date. Observer. 



Wheatear Tring Eeservoii's Mar. 24 J. Street, 



[Saxicola ananthe) Berkhamsted ,, 28 A. F. C. 



(Last seen) Sawbridgeworth .... Sept. 6 H. S. Rivers. 



Eedstart Sawbridgeworth April 15 H. S. liivers. 



{Euticilla phcsnicurus) Water End, near 



Berkham-sted ,, 23 A. F. C. 



(Last seen) Berkhamsted Sept. 12 A. F. C. 



Nightingale Sawbridgeworth April 11 H. S. Rivers. 



{Daiilias luscinia) Hitchin ,, 15 J. E. Little. 



St. Albans ,, 16 H. Lewis. 



Odsey ,, 18 H. G. Fordham. 



Tring „ 18 J. Street. 



Watford „ 18 C. Worte. 



Berkhamsted ,, 20 W. B. Hopkins. 



Boxmoor ,, 21. ..A. F. C. 



llarpenden May 1 J. J. Willis. 



