304 Capt. F. Balfour-Browne on 
L. Urr. Dumfries and Kirkcudbright (specimens taken in various parts 
of the loch). 
L. Roan. Kirkcudbright. 
L. Ken. 5) 
L, Dungeon. , 
L. Stroan (1 only). Kirkeudbright. 
L. Dornell. > 
Woodhall L. ms 
L. Doon. Ayr. 
With the exception of L. Stroan, where only one specimen 
(3) occurred amongst many elegans, these lochs, scattered 
over a large district, were occupied by depressus to the entire 
exclusion of elegans. In some, e. g., Talkin Tarn, L. of the 
Lowes, L. Roan, 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 elegans. Why 
should Lochs Urr, Ken, Roan, Woodhall, and Dornell con- 
tain depressus, when Howie, Skerrow, Auchenreoch, Milton, 
Lochrutton, Aber, and Kinder contain elegans, 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 Hnoch 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 elegans 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, elegans, 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 §.; Hants, 8.; Kent, E.and W.; Middlesex ; Bucks; 
Herts; Cambs; Norfolk, E.; Suffolk, E.; Cumberland; 
Isleof Man; Dumfries; Kirkcudbright; Lanark; Renfrew ; 
Peebles; Edinburgh; Mid-Perth ; Hasterness and Ebudes N. 
—a 
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