TOMICUS TYPOGRAPHIC. 



241 



are normally rare in Britain, may occur unexpectedly in some 

 numbers and prove destructive, it is desirable that the forester 



Fig. 102. Burrows of T. typographies, L., in spruce-bark. (Natural size.) 



a Pairing-chamber. c Air-hole. e Flight-hole. 

 b Mother-gallery. d Larval -galleries. 



should be acquainted with the economy of such species as 

 the present, so as to be prepared to meet a contingent out- 

 break, which is by no means impossible. T. typographies, L., 

 F.P. R 



