Spruce destroying- beetle, D end roc ton us piceaperda Hopk. 



1 Internal aspect of badly mined spruce bark. This view shows the lon- 



gitudinal adult gallery and the numerous irregular dilating ones made 

 by the larvae. 



2 Interior view of bark showing several longitudinal adult galleries pre- 



served by infiltrated pitch, and also two ventilating burrows, the latter 

 showing light, owing to the white background 



Blue pine borer, C a 1 1 i d i u m ant e n n a t u m Newni. 



3 Hard pine branch showing characteristic mines 



7S2 



