30 1 Capt. F. Balfour-Biowne on 



L. Urr. Dumfries and Kirkcudbright (specimens taken in various parts 



of the loch). 

 L. rjoau. Kirkcudbright. 

 L, Ken. „ 



L. Dungeon. „ 

 L. Stroan (1 only). Kirkcudbright. 

 L. DornelL ,, 



Woodhall L. „ 



L. Doon. Ayr. 



With the exception of L. Stroan, where only one specimen 

 (cJ) occurred amongst many eiegans, these lochs, scattered 

 over a large district, were occupied by depressus to the entire 

 exclusion of eiegans. In some, e. g., Talkin Tarn, L. of the 

 Lowes, L. E-oan, and L. Ken, it was abundant and easily 

 taken, whereas in others an hour or more was necessary to 

 get sometimes only a few specimens. 



A glance at the Ordnance Map will show the extraordinary 

 nature of this distribution. In the Merrick and Kells 

 district, out of thirteen lochs examined only one (L. Dungeon) 

 gave me this species, while seven gave me eiegans. Wiiy 

 should Lochs Urr, Ken, Roan, Woodhall, and Dornell con- 

 tain depressus^ when Howie, Skerrow, Auchenreoch, Milton, 

 Lochrutton, Aber, and Kinder contain eiegans, or why should 

 St. Mary's L. and the L. of the Lowes have the former, 

 while L. Skene, an " Arctic " loch dammed up by moraine 

 material, only contains the common species? 



If depressus occurred in such lochs as Enoch and Skene, 

 we could quite easily account for its distribution, on the 

 ground that it is a remnant of the old fauna of the Glacial 

 Period still holding on in a few isolated habitats ; but its 

 " spotty " distribution and its isolation from eiegans are facts 

 as to the explanation of which I can at present make no 

 guess. When things once more settle down to their normal, 

 I hope to further investigate the matter and to follow out the 

 life-histories of the two species, from which, perhaps, some- 

 thing may be learnt. 



The common species, eiegans, is undoubtedly much more 

 widely distributed than my records indicate ; but this is not 

 the time to worry other Coleopterists to send me their speci- 

 mens for examination, so that I have been limited in material 

 almost to what I have collected myself. I have in my collec- 

 tion or have seen specimens from the following counties and 

 vice-counties : — Cornwall, W. ; Devon, S. ; Somerset, N. 

 and S. ; Hants, S. ; Kent, E. and W. ; Middlesex ; Bucks ; 

 Herts; Cambs ; Norfolk, E. ; Suffolk, E. ; Cumberland; 

 Isle of Man; Dumfries; Kirkcudbright; Lanark; Renfrew; 

 Peebles ; Edinburgh ; Mid-Perth ; Easterness and Ebudes N. 



