83 



On April the 4th another innnigration reached Devon, 

 Dorset and Somerset ; this was followed by a further 

 immioration into Somerset on the Gth ; but the subsequent 

 movements of this flight cannot be traced. 



The main immigration of this species took place between 

 the 11th and 16th of April, when numbers of birds landed 

 between Hants and Dorset, and their course can be traced 

 through the country as far north as Westmoreland. Between 

 the 21st and the 23rd there was another considerable immi- 

 gration in Dorset and Hants, and this was followed by the 

 first records from the eastern counties — Essex, Bedford, 

 Cambridge and Norfolk. 



The first nest was recorded in Berkshire on the 27th, 

 and the following day a nest with two eggs was found in 

 Glamorgan. 



It is probable that further small immigrations occurred, 

 notably in Dorset and Wiltshire, between the 27th of April 

 and the 1st of May, and were followed by an increase in 

 Shropshire on the ord, in Yorkshire on the 4th, and in Cam- 

 bridge on the Gth ; but the records are not sufficiently 

 numerous to establish this with certainty. 



The ChifFchafF is not often observed at the lights, and 

 during the season of 1907 it was only noted at St. Catherine's : 

 on the other hand, its congener, the Willow-Warbler^ is one 

 of the commonest of the species picked up at the lights.* 



Chronological Summary of the Records. 



Seen at Penzance, Cornwall, throughout the winter of 



190G-07. 

 March 18. Leicester. 



„ 21. Berks. 



„ 22. Kent, Bucks. 



* On April 15tli a specimen of tLe northern CliifTcLaff {ThyUosco2m$ 

 rvfus (ibietina, Isilss.) was received with several examples of the common 

 form from St. Catherine's light. This is belieyed to be the first recorded 

 occurrence of this form in England, though it probably occurs annually 

 on migration. 



