38 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 
mature and ready to escape, time is given for observation and 
procedure against it. 
I must say that this two-yearly generation of the pine-pole 
weevil, when its small size is remembered, has often seemed to me 
hard to believe; and yet I am forced to admit that, so far, all the 
evidence forthcoming points to its correctness. At present I am 
engaged in some experiments with a view to determining beyond 
doubt the generation of piniphilus. On the Continent the weevils 
issue in June and the beginning of July, the eggs are laid in July, 
and the larvee live as such for over twenty months. Nitsche’s 
calendar is as follows :— 
ted nating | 
| Jan. | Feb. | Mar. | apt, | May. ae sept, ont Nov. | Dee. 
Mei. kay |. ARB ot de) 0) el 
| | | ‘ | Feledin 'g | Hiber nating’ 
1395 are TRRGCRERCMEMCMO Gal: ) 
_Hiber Hiber, nating iss Ane rac, ne Hiber nating 
1896 | L Eide) | LEP!) PR,|BB'|w lw onlthiakianl 
| 
iE het 
Feed- | kK | | 
=| ing 
Prevention and Remedy.—Sickly poles with the needles of the 
crown discoloured should be felled about the spring of the second 
year’s attack, i.e., before the flight-time of the mature beetles. 
The felled poles should be barked, and the bark burned. Any 
pupa-beds in the alburnum must also be destroyed. Altum 
insists on the necessity of destroying the tops of the felled trees, 
as these tops are often left lying, and are used by piniphilus as 
breeding-places. 
From some specimens of a twenty-year-old pine cut in the 
forest as attacked by the pine-pole weevil, I secured many 
examples of a parasitic ichneumon. 
Pissodes harcyniae, the Harz Weevil. 
The Harz weevil measures from } inch to a little more in size. 
It is thin and black, and sparsely sprinkled over with white 
scales. Posterior corners of prothorax rounded, its upper surface 
scaled with white. Scutellum also whitish. Two interrupted 
transverse bands, one before and one behind the middle of the 
