LEPIDOPTERA, ETC., AT SCOTTISH LIGHTHOUSES 135 



good many cases. So far the only specimens that can 

 certainly be regarded as immigrants are the Death's-head, 

 and the two Convolvulus Hawk-moths. All the other species 

 are doubtless indigenous in Scotland ; but among the 

 examples that visited the lighthouses some may quite well 

 have been of non-local origin. To get to the Isle of May, 

 from which the bulk of the records were obtained, many of the 

 species must have flown across several miles at least of sea, 

 for the food-plants of their larvae do not grow there — trees 

 and shrubs, for instance, are conspicuous by their absence. 

 A Pine Weevil and a Water-bug {Corixa) have been caught 

 beside the lantern, and a new water-catch on the island was 

 soon colonised by four species of the latter genus. Though 

 nothing of outstanding rarity has been obtained, some 

 interesting captures have been made, including several 

 additions to the lists for faunal areas. It is recognised that 

 the North Sea is too wide opposite Scotland for many 

 insects to succeed in crossing it, and that, of course, results 

 such as would doubtless reward a similar investigation on 

 the south-east coasts of England are not to be expected here. 

 Little has so far come from the Bell Rock, but it is evident 

 from what Mr J. M. Campbell states in his book about 

 that station that insects do occasionally appear there in 

 numbers. 



My frequent visits to the Isle of May have naturally 

 brought me into touch with the secretary, MrC. Dick Peddie, 

 and other officials of the Northern Lighthouse Board, and 

 I take this opportunity of recording my grateful thanks for 

 the many acts of kindness received at their hands. 



