Spruce destroying beetle, D e n d r o c t on u s p i c c a p e rd a Plopk. 



1 Internal aspect of badly mined spruce bark. This \'ie\v shows the lon- 



j_;"itudinal adult yaller)' and the numc-rous irrei^ular tlilating ones made 

 by the larvae. 



2 Interior \'ie\v of bark showino- several longitudinal adult galleries prc- 



ser\ed b)' inhltrated |)itch, and also two ventilating biu'rows, the latter 

 showing light, owing tt) the white background 



Blue pine borer, C a 1 li d i u ni a n t e n n a t u m Newm. 



3 Ilai'd pine ijrcUich showing characteristic mines 



