88 THE SCOTTISH NATURALIST 
is by no means confined to the Dee valley, for I have 
observed it in numbers in Montreathmont Muir, near Auldbar 
in Forfarshire, at Stanley, Murthly, and Dunkeld in Perth- 
shire, and my friend Mr H. M. Steven has observed it in 
numbers near Loch Broom in Ross-shire. 
The haunts of our remaining rarer species I have been 
unable to discover. They are mostly of southern and border 
occurrence, and include Xylocleptes bispinus, Duft., and 
Tomicus typographus, L., both recorded from Dumfriesshire 
in Dr Sharp’s list. It is probable that both were importa- 
tions, although the former occurs locally in England. It is, 
however, a dweller in Clematis vitalba,a climber much less 
common in Scotland than in the south. Another species 
amongst the early records, the presence of which | think 
must be regarded doubtfully, is Zommcus laricis, Fab. I have 
had considerable experience of it recently, and its distribution 
is strikingly well defined. It is a common English species 
south of the Tyne and Solway, but north of that it disappears 
and is completely replaced by 7. acumznatus. Now many of 
the English Bark-beetles disappear north of a line drawn 
from Newcastle to Carlisle. A/y/astes opacus is rare in 
Cumberland and Northumberland, and once the border is 
crossed is quite a stranger; I think that both these species, 
like Scolytus destructor, Ol., and its congeners, must be 
regarded as English rather than British species. 
The Solway records of //ylestnus oleiperda, F., and 
vittatus, F.,are probably to be regarded as English stragglers 
although they may yet prove indigenous in Scotland. 
H. vittatus, F., however, is a dweller in the English elm, 
and may not succeed on our Scottish tree, while H/. olecperda 
is distinctly local in England. It occurs on ash often in 
company with A. /fraximz, F., a species which is fairly 
common in Perthshire. Pztyophthorus pubescens, Marsh 
(ramuloruim, Perris), is apparently more common in Scotland 
than was supposed, as I have taken it in Deeside from 
Bieldside to Aboyne, and in Perthshire at Murthly and in 
Strath Braan. 
