HYMENOPTERA OF ALASKA 



BY WILLIAM HARRIS ASHMEAD 



CONTENTS : 



Introduction 123 



Systematic account 129 



Heterophaga : 



I. Apoidea . . . . 129 



II. Sphecoidea 137 



III. Vespoidea 140 



IV. Formicoidea 141 



V. Proctotrypoidea 142 



VI. Cynipoidea 147 



VII. Chalcidoidea 149 



VIII. Ichneumonoidea 154 



Phytophaga : 



IX. Siricoidea 259 



X. Tenthredinoidea 260 



INTRODUCTION. 



ALASKA has long been a terra incognita to the Hymenopterol- 

 ogist. Up to the year 1899, the date of the Harriman Expedi- 

 tion, less than 30 species of Hymenoptera were known from 

 this vast territory. 



[117] 



