262 hymenoptera. 



96. Sphex Philadelphica. 



Sphex Philadelphica, St. Farg. Hym. Europ. i. 340. 11. 

 Hab. Philadelphia. 



97. Sphex tibialis. 



Sphex tibialis, St. Farg. Hym. Europ. i, 339. 10. 

 Hah. Philadelphia. (Coll. W. W. Saunders, Esq.) 



98. Sphex violaceipennis. 



Sphex violaceipennis, St. Farg. Hym. iii. 349. 22. 

 Hab. Philadelphia. 



99. Sphex crcesus. 



Sphex crcesus, St. Farg. Hym. iii. 351. 25. 



Hah. North America; Mexico. (Coll. F. Smith.) 



100. Sphex dimidiata. 



Sphex dimidiata, St. Farg. Hym. iii. 352. 26. 

 Hah. North America. 



101. Sphex elegans. B.M. 



Male. Length 7 lines. — Black : the face covered with a short 

 rich golden pubescence, and sprinkled with long hairs of the 

 same colour; the mandibles ferruginous at their aj)ex. Thorax 

 thinly covered with erect golden hairs ; the mesothorax and 

 scutellum evenly punctured ; the metathorax opake ; wings yel- 

 low-hyaline, with a pale fuscous cloud at their apical margins, 

 and a darker one beyond the marginal cell ; the nervures pale 

 ferruginous ; the knees, tibiae and tarsi ])ale ferruginous ; the 

 tips of the claws black. Abdomen smooth and shining, with the 

 a})ical margins of the segments obscurely rufo-testaceous ; some- 

 times the two basal segments are ferruginous, with the base of 

 the first, and base and apex of the second, black. 



Hab. California. 



102. Sphex apicalis. B.M. 



Sphex apicalis, Harris, Cat. Ins. Massach. 



Male. Length 6-8 lines. — Black : the face covered with short 

 silvery pubescence, and sprinkled with a mixture of long fuscous 

 and pale hairs ; the mandibles slightly ferruginous at their inner 

 margin towards their apex ; the vertex is shining, sparingly and 



