.1. W. MlINRO 



171 



In the larval stage Ilijlobiioi is harmless. The adult deposits her 

 eggs in or under the bark of the stumps of various conifers but prefers 

 Scots pine. The larva on hatching out, commences to tunnel between 

 the bark and the sapwood, and when full grown pupates at the end of 

 this tunnel, either in a cavity or hook gallery in the sapwood, or in a 

 cavity in the bark. The tunnels are filled with frass, consisting of tiny 

 chips of wood bitten out by the larva and passed through its body. 



rt, h. Larvae of B. hijlohii. x 12. 

 c. Pupa of B. hi/lohll. x 12. 



Fig. 2. 



(a after first moult. 



h after second moult. 



The whole of the larval life is passed in such a tunnel. In the spring 

 of 1912 I noticed a few tiny cocoons lying in one of these tunnels but I 

 attached no importance to them at the time. In July of last year, 

 however, I found several weevil larvae apparently in the resting stage, 

 which were attached by a small legless maggot feeding externally on 

 Ann. Biol. i. 1^ 



