32 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 
The female notatus after copulation bores a hole in the bark 
for the reception of her eggs by means of her mandibles situated 
at the end of the rostrum. The eggs are first laid, and then, 
taken up in the mouth, are introduced by means of the proboscis, 
Several eggs are laid in each bored place. If pine in the pole 
stage be chosen, then, owing to the sufficiency of room at the 
disposal of the larve, the tunnels show a star-like pattern. 
Most commonly, however, as young plants are chosen for egg- 
laying, the larvee on hatching out tunnel upwards and downwards, 
and indeed it may only be downwards, as the female notatus is 
very fond of laying her eggs immediately below a whorl of 
branches, and there is thus a kind of natural barrier to the up 
ward direction of the tunnelling. The tunnels wind in the bark 
and towards the outer layers of the wood, a trail of brown bore- 
dust remaining behind to map out the path of the larva. Arrived 
at the wood, the grown larva gnaws out a hole in the outer layers, 
and in this hollowed-out bed protected by a cover of sawdust 
and chips the pupation stage is passed. If one remove the chip 
cover ere the flight-time of the beetles, the pupa can be seen 
lying with the rostrum arranged along the under surface of 
the thorax. When the beetles are ready to escape, they bore 
a circular hole through cover and bark. On emergence they 
are light coloured, but they soon darken into their normal 
coloration. 
The weevils are somewhat sluggish, and rather timid. In 
collecting them, when touched, they would drop to the ground, 
and lie on their backs for a considerable time without movement, 
as if dead. This is not the place to enter into the interesting 
psychological questions that underlie the dropping to the ground, 
and the death-feigning characteristic of so many insects, suffice 
it to say that notatws falls on being touched, not from any lack 
of power to grip, for if the weevils be made to crawl over the 
hand or fingers, one is conscious of their ability to hold on. 
Incidentally, I might remark here how perfectly the beetles are 
adapted in coloration to their surroundings, it being a very 
difficult matter to pick them out on a young pine if they 
are motionless. 
The Generation of P. notatus.—Regarding the flight-times 
and the generation of our pest, there has been no little contro- 
versy; and as the question of the generation of a timber-infesting 
insect, from its close relation to extermination measures, and 
