1 9 1 8 .] Birds of the Isle of May. 269 



**Hypolais polyglotta. The Melodious Warbler. A very 

 rare visitoi% the only record being of an adult female on 

 27 September, 1913. 



Phylloscopus trochilus trochilus. The Willow-Warbler. 

 A passage migrant in large numbers from 20 April through- 

 out May and even, in 1914, on 10 & 11 June; probably 

 the earlier are our Scottish breeding-birds arriving, while the 

 later are on their way overseas. A considerable movement 

 takes place in August, sometimes beginning as early as the 

 5th^ these being probably departures of home-bred birds. 

 This is supplemented throughout September by passage 

 migration, which occasionally lasts even up to 18 October. 

 This bird is strongly attracted by light. 



^^Phylloscopus trochilus eversmanni. The Northern 

 W^iLLow - Warbler. This long -winged race has been 

 obtained twice — at the lantern on 10 May, 1909, and on 

 6 October, 1911. It doubtless occurs more commonly, but, 

 being difficult to distinguish from the typical form, is over- 

 looked. 



Phylloscopus sihilatrix sibilatrix. The Wood-Warbler. 

 The only authenticnted records for the island are on 3/4 

 May 1914, when one was killed at the lantern, 8 August 

 1915, and 26 August 1917. 



Phylloscopus coUybita coUyhita. The Chiffchaff. Occurs 

 occasionally in spring and autumn. In spring the records 

 are on 17 April 1909, 12 May 1913, and 8 May 1917; in 

 autumn there is one record in August, two in September, 

 and a good many in October. In the autumns of 1912 and 

 1913 a good many o£ this and the following subspecies 

 appeared on the island ; otherwise the records are but 

 isolated ones. 



^Phylloscopus coUyhita abietinus. The Scandinavian 

 Chiffchaff. There are several records of this race in the 

 autumns of 1912 and 1913 and two in that of 1914 ; the 

 dates range from 30 September to 3 November. 



SBR. X. — VOL. VI. u 



