53 
At the present time the fine spruces in Dunham Park are 
being rapidly destroyed by one of the large weevils Hylo- 
bius abietis, and many ash trees by a small species mining 
in the bark, Hylesinus fraxini. In the valley of the Spean 
in Perthshire the alder trees are being destroyed by the 
larvae of Stenocarus bifarciatum. They begin the work, 
which is joined in by some smaller species, to such effect 
that you may see there trees, 30 inches in diameter, through 
which you can thrust a walking stick. 
A short time ago I accompanied a friend to his fishing 
cottage, in the north of Lancashire. It had been closed up 
for a little time, and the chairs and tables had been attacked 
by Anobium striatum, and although in appearance quite 
perfect, when touched almost crumbled to dust. 
I bring for exhibition a piece of bark mined by two 
species of beetle, of great interest to entomologists, Hylesinus 
vittatus and Nemosoma elongata. The latter species was 
taken in 1833 by Mr. Ingall, at Sydenham, and since then 
it has not been met with, except about three specimens, 
until the spring of this year, when my friend Dr. Power 
found it in Warwickshire and investigated its habits, pub- 
lishing an account in the Entomologist. From his observa- 
tions he ascertained that this species feeds on the larvae of 
Hylesinus vittatus, carrying its galleries across so as to 
intercept and devour them. Having myself once found the 
Hylesinus in some old railings at Beeston, near Nottingham, 
when I was at the British Association meeting in August I 
again visited the place, and after careful search found some 
specimens of the rare Nemosoma in its mines across the 
tracks of Hylesinus. The portion of bark exhibited will 
show the mines, and the carded specimens will show the two 
species. 
Stevens mentions Colwich near Nottingham, on the 
authority of Dr. Howitt, as a locality for Nemosoma ; so no 
doubt by careful search it may be found in many other 
