54 NOTES ON THE NATURAL HISTORY OF THE BELL ROCK. 



of the builder, Robert Stevenson, almost a hundred years ago. 

 The central subject depicted on the white ground is the Bell 

 Rock Lighthouse ; on the right, the patron saint of Scotland 

 with his cross ; while a ship under full sail occupies the left, 

 the whole bordered with a deep edging of red. The figures 

 are extremely well executed, and the colouring to the flesh 

 tints remarkable. The flag was presented to the Rock by 

 Miss Stevenson to be used as a table draping during divine 

 service. 



Several white butterflies and moths innumerable were seen 

 passing here this month. It seems these insects have their 

 migratory periods as well as birds, and at stations favourable 

 for their observation they appeared, to quote from a writer in 

 a recent number of " Chambers's," "as a dense snowstorm 

 driven by a light breeze, and this not for one day only, but for 

 many in succession. Whereas birds come and go with 

 clockwork regularity, the immigration of butterflies is un- 

 certain, and of all those which survive the perils of the deep 

 no single one returns." 



