CONTENTS. 



Page. 



Introduction 17 



Death of the pine caused by the western pine-destroying barkbeetle 18 



Character of the insect and its work 18 



Distribution 19 



Extent of damage and losses 19 



Possibilities of preventing losses ^ 20 



Early history of the species 20 



Observations by Hopkins, 1899-1904 ; 21 



Observations by H. E. Burke, 1904 : 23 



Observations by the writer, 1905 23 



Life history and habits of the insect 23 



Hibernation 23 



First generation 24 



Second generation 24 



Habits 25 



Natural enemies 27 



Insects 27 



Birds 27 



Methods of combating the insect 27 



First recommendations 27 



Trap trees 28 



Summary 29 



Habits and life history 29 



Remedies r 30 



Trap trees 30 



Storm-felled and lightning-struck trees 30 



Publications relating to the western pine-destroying barkbeetle 30 



V 



