386 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 
Distribution.—Fowler gives Northumberland, the Forth, Tay, 
Dee, and Moray districts. 
Life-History.—The larger brown weevil lays her eggs on old 
stems of the genus Pinus, Scots pine and the Weymouth pine 
figuring most largely in notices of attack. The thinner parts of 
the tree are not neglected by the females; indeed Altum, generalis- 
ing from his experience with pint and other Pissodes, proclaims 
that in the first instance it is the upper thinner parts, and later 
in the progress of the attack that the lower thicker parts are 
infested. Spruce is sometimes used for egg-laying. 
A varying number of eggs are laid in a hole bored by the 
female in the bark. The larve start from their common hatching- 
place and bore out in all directions, the tunnels, however, 
running chiefly in the long axis of the stem. In one case Altum 
counted no fewer than thirty of these tunnels springing from one 
point. The tunnels are long (I have found specimens up to a 
foot in length) and winding, and they often cut one another. 
The pupa-beds, with their characteristic covering of chips, are 
always at least partly in the outermost layers, and sometimes, as, 
for example, where thin material has been attacked, altogether in 
the wood. We have no experimental information as to the 
generation of pini, but Nitsche suggests the following calendar 
for middle Europe, the generation being an annual one :— 
Jan. | Feb. | Mar.|April| May. | June.) July. | Aug. | Sept. | Oct. | Nov. Dec. 
1895 BB |BB |LLL| LLL} LLL) LL LL 
F\eedin |g Hiber|nating 
1896 | LL LL | LL| LL| PPP| PBB 
Hiber|nating} Fee|ding 
The mature beetles do some harm by piercing a number of 
holes in the bark. Such harm has also been noticed on twigs 
of larch, and to the tufts of needles. 
Extermination Measwres.—I can speak from observation of the 
great service against this pest of catch trees. So many trees are 
marked out and felled as brood material, and these are barked 
at the proper time. The bark containing the broods of larve ig 
burned, 
