302 THE CANADIAN ENTOMOLOGiST. 



Boring in trees. 



Under bark of trunks some distance from the base or in the branches : 



Maple Sesia acet ni. 



Maple " c0r7ii. 



Apple, Pear " pyri. 



Dogwood, Oak, Chestnut " scittila. 



Alder " Americana. 



Cherry, Plum, Juneberry " pictipes. 



Pine, Redwood (Sequoia) Vespamima sequoia. 



Pine and Spruce Parharmonia pini. 



Under bark at base of trunk or main roots : 



Peach, Cherry, Plum, Apricot, etc Sanninoidea exitiosa. 



Peach and Cherry " opalescens. 



Peach, Cherry " Graefii. 



In solid wood of trunks : 



Ash Podosesia syringes. 



Ash " fraxini. 



Oak Memythrus siviulans. 



•Cottonwood JEgeria pacifica. 



•Cottonwood and Locust Memythrus robitiite. 



Poplar " Dollii. 



Willow and Poplar " tricincUis. 



Willow Sesia Bolter i. 



Willow " albicornis. 



In solid wood at base of trunks and roots of trees : 



Persimmon Saiuiina uroceriformis. 



Willow and Poplar ^-Egeria apiformis. 



Willow " tibialis. 



Ash, Alder Memythrus asilipennis. 



Boring in shrubs. 

 In solid wood ; 



Lilac Podosesia syringes. 



In pith of stems : 



Currant, Gooseberry Sesia tipuliformis. 



In roots : 



Blackberry and Raspberry Sesia rutilans. 



Blackberry and Raspberry Bembecia marginata. 



Sumac Mellttia gloriosa. 



