40 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 
From some recent observations on the Harz weevil, it seems that 
one cannot always be certain, from the presence of large resin 
outflow, that larvee will be found on examination of the bark, for 
the outflow of resin may have been such as to stifle any hatched 
out larve. This, I think, is most probable, and likely to happen 
not infrequently with the Harz weevil, as it attacks sound trees. 
Miss Oriwerod, in her ‘‘ Manual of Injurious Insects,” adduces 
examples of the grubs of the Elm Bark Beetle being drowned out 
by excessive flow of sap following the wounding of the tree; and 
I myself have been witness to an attack on a seventy-year-old 
spruce on the part of the adult beetle Hylesinus micans (not a 
British species), an attack which was quite beaten off owing to 
the great outflow of resin following the woundings of the beetles. 
(6) The smooth bark where the eggs have been laid will be 
found to be ridged up somewhat over the larval tunnels. 
(c) Discoloration of the needies. 
Catch trees have proved successful with harcyniae as with 
pini. Jchneumons here, too, are serviceable. In one of the 
specimens which I have prepared to illustrate this paper, the 
cocoons of an ichneumon are seen, eloquent witnesses of a great 
tragedy. In the pupa-beds, dug so laboriously by the parasitised 
harcyniae larvee, no harcyniae pupe are to be found, but in their 
places useful ichneumons, descendants of the one, 
‘* Who for her embryon young 
Gored with sharp horn the caterpillar throng. 
The voracious ichneumon maggots had accomplished their work 
so thoroughly, that of the harcyniae larve nought remained 
behind but their indigestible horny jaws and an empty skin or 
two. 
Pissodes piceae, the Large Silver Fir Weevil. 
This beetle measures up to 2 inch in size, and is dark brown in 
colour. Wrinkled prothorax, with posterior corners projecting 
somewhat, and its hinder edges somewhat sinuous, Several 
white dots occur on the surface of the prothorax, which is 
traversed by « median longitudinal slightly raised line, 
Scutellum whitish. The whole upper surface of the beetle is 
covered with brownish-yellow scales. Below the middle of the 
wing-covers is a yellowish band, broader externally, and inter- 
rupted at the suture. The hollow pits arranged in longitudinal 
