CONTHXTS. 



rage. 



Introduction 17 



Dcatli of tlu' pine caused l)y the western pinc-destroying barkbeetle IS 



C'liaracter of the insect and its work 18 



Distiiluition 19 



Kxtent of (hiinage and losses 19 



Possil)ilities of prevent ing losses 20 



Karly history of the species 20 



Ohservations hy Hopkins, 1899-1904 21 



01)s«Tvati()ns l)y H. E. Burke. 1904 23 



Observations by the writer, 1905 23 



Life history and habits of the insect 23 



Hibernation 23 



First generat ion 24 



Second generation 24 



Habits 25 



Natural enemies 27 



Insects 27 



Birds 27 



Methods of combating the insect 27 



First recommendat ions 27 



Trap trees 28 



Summary 29 



Habits and life history 29 



Remedies ."iO 



Trap trees 30 



Storm-felled and lightning-struck trees 30 



rubliiations relating to the western pine-destroying barkbeetic 30 



V 



