230 BEUTENMULLER, MONOGRAPH OF THE SESIID^E. 



In solid wood of trunks and branches : 



Ash Podosesia syringce. 



Ash fraxinu 



Oak > Memythrus simulans. 



Cottonwood sEgeria pacifica. 



Cottonwood and Locust Memythrus robinice. 



Poplar dollii. 



Willow and Poplar tricinctus. 



Willow Sesia bolteri. 



Willow " albicornis. 



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



Persimmon Sannina uroceriformis. 



Willow and Poplar sEgeria apiformis. 



Willow tibialis. 



Ash, Alder Memythrus asilipennis. 



Boring in shrubs. 



In solid wood : 



Lilac Podosesia syringce. 



In pith of stems : 



Currant, Gooseberry Sesia tipuliformis. 



In roots : 



Blackberry and Raspberry Sesia rutilans. 



Blackberry and Raspberry Bembecia marginata. 



Sumac Melittia gloriosa. 



Boring in vines and creeping plants. 

 In the stems : 



Squash, Pumpkin, and other Cucurbs Melittia saiyriniformis. 



Big-root (Megarrhiza) " gloriosa. 



In roots : 



Grape-vine Memythrus polistiformis. 



Clematis Alcathoe caudata . 



Clematis " korites. 



Herbaceous perennial plants. 

 In roots : 



Strawberry Sesia rutilans. 



In stem : 



Eupatorium Sesia lustrans. 



In borings of other insects : 



Oak-gall (Andricus cornigerus) Sesia scitula. 



Oak-gall {Andricus cornigerus) " rubristigma. 



Gall on Live Oak " querci. 



Gall on Oak " sapygczformis. 



Gall on Mesquite " prosopis. 



Gall of Saperda concolor " albicornis. 



Gall of Saperda concolor Memythrus tricinctus. 



Characters of the Pup^. 



The pupae are shining brown, armed with transverse rows of teeth or spines 

 on the back of the abdominal segments, by aid of which, when they are in readi- 



