2Jj8 fAp"i. 



them and the description with the type of A. Scylla ; the two species 

 are nearly allied, but I think quite distinct. 



One distinctive characteristic occurring in Scylla, and not men- 

 tioned above, does not appear to exist in A. Werang, and I think it as 

 well to notice it as additional evidence of their specific distinction, 

 viz. : — the veins on the under-side of the hind-wings in Scylla are 

 powdered with whitish scales. — A. Gr. Butler, Brit. Mus.] 



Lepidoptera at Rannoch in 1867. — The well-known entomological locality of 

 Rannoch is that part of N. W. Perthshire surrounding Loch Rannoch, a lake about 

 eleven miles in length, and lying east and west. Immediately from its shores rise 

 hills, whose slopes are covered with native thickets and woods of birch and alder, 

 with an undergrowth of heath and heather {Erica cinerea, E. tetralix, and Calluna 

 vulgaris), our four native Vaccinia, Myrica Gale, &c. 



In one part a large forest of pine {Pinus sylvestris) extends for about three 

 miles along the southern shore of the loch, and is aptly termed, from its sombi'e 

 appearance, the " Black Wood."* 



Why Rannoch should be so much richer in insects than other places apparently 

 as suitable is not altogether easily accounted for satisfactorily. I believe, however, 

 that its elevation, its undisturbed surface thickly but openly wooded, and its 

 western situation, must all be taken into consideration. On consulting a map it 

 will be seen that Rannoch lies decidedly in the western half of Scotland, and this is 

 confirmed by the occurrence of insects and plants that are rarely, if ever, found in 

 the eastern half. 



More especially I allude to Acidalla fumata, &c., and to Drosera intermedia and 

 Hypnum flagellare. 



Perhaps another reason for Rannoch's superiority may be owing to the great 

 extent to which it has been "worked." Every year some species are added to its 

 Fauna, and not always are these Boreal insects, but sometimes, species that seem 

 (at least in Britain) to affect a more southern range, e. g., Stilbia anomalaf and 

 Sterrha sacraria, discovered as Rannoch insects by the Messrs. Blackburn this 

 season. 



No one who has studied the "Manual" can have failed to have noticed a great 

 similarity between the Fauna of the Lake District in England and that of Rannoch 

 in Scotland. In the Lake District we have a similar elevated region of lakes and 

 mountains, with a like western situation. The Lake District, however, far out- 

 numbers Rannoch in the variety of the species it produces ; but this may be 

 accounted for by its far greater extent (two counties and part of a third), its more 

 southerly situation, its climate, and its larger Flora. 



Rannoch, as far as my observations have gone, does not possess many more 

 than 280 flowering plants, while the Lake District has nearly three times that 

 number (721). 



• Not " Black Forest," as often stated. A " forest" in the Highlands is olten entirely destitute of 

 trees, and simply means a tract of country set apart for the red deer. — F. B. W. 



t Has this not been taken at Kaunoch before? — Eds. 



