262 TUfe zooLOGist. 



Erithacus rubecula is a common spring and autumn visitor to 

 Heligoland. Three Bluethroats appear in the Heligoland list — 

 E. suecica with the red spot is common in spring and autumn ; 

 E. leucocyana with the white spot was common in April, 1877, 

 but is otherwise only known as an accidental visitor ; and the 

 so-called E. ivolft with no spot on the breast, which is generally 

 supposed to be an accidental variety of the other species, was ob- 

 tained in March, 1848. In addition to our Nightingale, E. luscinia, 

 the larger species, E.philomela, has once occurred on Heligoland. 



To the three British species of Flycatchers, a fourth, Musci- 

 capa albicollis, must be added to complete the Heligoland list. 



The genus Pratincola is represented by the same two species 

 in both lists ; but to the three British species of Saxicola three 

 more must be added as stray wanderers to Heligoland — S. aurita, 

 S. morio, and S. leucura, though some doubt attaches to the latter. 

 The same remark applies to the genus Ruticilla. In addition to 

 the two British species R. mesoleuca may certainly be added, and 

 R. moussieri very doubtfully. In addition to Monticola saxatilis, 

 M. cyana is included in the Heligoland list on the faith of an 

 example caught about the year 1830, and identified years after- 

 wards from memory. 



Cinclus melanogaster is an occasional wanderer to Heligoland, 

 as well as to the British Islands, but our resident rufous-breasted 

 race is not known to have occurred on the little German rock. 



To complete the Heligoland list of Turdince, two American 

 species have found their way to the island, with or without the 

 aid of ships — Ilarporhynchas rufus, in the autumn of 1836 ; and 

 Mimus carolinensis, in October, 1840. 



Both the Heligoland and British lists have claimed a Pycno- 

 notits ; the former is said to have been caught in May, 1837, and 

 is recorded as the Palestine species, P. xantopygas ; the latter 

 was shot near Waterford, in January, 1838, and (if the skin has 

 not been changed) was a South African species, P. capensis. 

 The near coincidence of the dates is remarkable. 



In the subfamily Sylviince the Heligoland list is specially 

 remarkable. In addition to the 20 British species it contains 

 16 others. There can be no doubt that in August, 185(5, a 

 LocuBtella certhiola was shot on the island, having presumably 

 wandered thither from Central Siberia; nor can it be denied 

 that Giitke's collection contains an example of Acrocephalus ac/ri- 



