104 THE SCOTTISH NATURALIST 



September. During this period the bird was observed on no less 

 than ten different dates, and on 29th August four different examples 

 came under notice. 



Siberian Chiffchaff, Phylloscopus fristis. — This small north- 

 eastern warbler is proving itself to be an annual visitor during its 

 autumn peregrinations. A female example was obtained on 24th 

 October. Other Chiffchaffs were present, and may have included 

 further individuals of this interesting species ; but it is practically 

 impossible to identify critical forms on sight in localities like Fair 

 Isle, where one only gets a momentary glimpse of the Warblers 

 amid the plots of cabbages, turnips, and potatoes, in which they 

 seek cover during their sojourn. 



Yellow-browed Warbler, Phylloscopus superciliosus. — This is 

 another visitor from the north-east, which in recent years has 

 become annual in its occurrence in the autumn. Occasionally a 

 few are seen in a day, but more often single birds. In 1914 two 

 appeared, one on 8th October and another on the 28th of that month. 



* Aquatic Warbler, Acrocephalus aqiiaticus. — This unexpected 

 addition to the fauna of the island, and of Scotland, has been so 

 recently the subject of a notice in this magazine (1915, p. 5) that 

 it is only necessary to repeat that the bird, a male, was obtained 

 during a rush of migrants on 23rd October. 



Marsh-warbler, Acrocephalus palustris. — The third visit of 

 this species to Fair Isle, and the fourth to Scotland, is chronicled 

 for 8th June. Apart from the Scottish visits, this bird is not 

 known to have occurred in the British Isles north of the southern 

 counties of England, to which it is a local summer bird. 



Reed-warbler, Acrocephalus strepenis — Like those of the 

 Marsh-warbler, the very few records of the visits of this species 

 to Scotland have all been, so far as is known, to the northern 

 islands. Hitherto its visits have only been detected in the 

 autumn; but in 1914 one appeared at Fair Isle on loth June. 



Icterine Warbler, Hypolais icteriiia. — This species has 

 occurred annually at the island during recent years in spring or 

 autumn, or both. In 1914 one appeared on nth June. It is an 

 interesting record, since the species so largely escapes notice as a 

 bird of passage along the British shores. 



Black Redstart, Ruticilla titys. — Single birds of this species 

 have appeared almost annually at intervals in both spring and autumn. 

 In 1 91 4 it was observed on three dates in April, namely, on the 6th, 

 9th, and 1 8th. The only autumn record is one seen on 23rd October. 



