134 THE CANADIAN ENTOMOLOGIST. 



Metathorax flat, feebly rounded behind ; scape as long as the first joint 



of the flagellum ; clypeus rounded Ceropalioides, Radoszk 



(Type C. Komarousii, Radoszk.) 



7 Scape cylindrical, neither subcompressed nor longer than the pedicel, 

 and first joint of the flagellum united ; clypeus flat, clothed with a 

 silvery pubescence; pronotum not longer than the mesonotum. . .8. 

 Scape subcompressed, longer than the pedicel and first joint of the 

 flagellum united ; clypeus very flat, not separated at base by a 

 delicate line ; pronotum distinctly longer than the mesonotum. 



Submedian cell in front wings a little longer than the median, the 

 second and third cubital cells subequal, the cubitus in the hind 

 wings originating beyo?id the transverse median 



nervure Pedinaspis, Kohl. 



(Type Pompilus operculatus, Kirby.) 



8. Metathorax a little longer than wide, semicircularly impressed or 

 emarginate posteriorly, but without a median impressed longitudinal 

 line, the hind angles more or less acute ; second cubital cell usually 

 a little longer than the third or subequal ; first joint of flagellum in 



$ as long as the second, in <$ shorter Wesmaelinus, Costa. 



(Type Sphex sanguinolentus, Fabr.) 



Metathorax not longer than wide, impressed posteriorly, but also with a 

 distinct median longitudinal impressed line; body clothed with a 

 silvery pubescence ; second cubital cell smaller than the third ; first 

 joint of flagellum in <$ as long as the second . . Homonotus, Dahlbom. 



(Type H. fusciventris, Dahlb.) 



Subfamily V. — Notocyphinge. 



This subfamily is quite distinct from all others, and is easily 

 recognized by the characters made use of in my table of subfamilies, the 

 large free labrum being found in no other group except the Ceropalina ,- 

 but from that group it is distinguished by the long pronotum, the curved, 

 not straight, antennae, and by the nonemarginate eyes. The antennae are 

 inserted some distance above the clypeus. 



The habits of the group are unknown. I suspect, however, that, like 

 the Ceropalince, the species are either parasitic or inquilinous in the nests 

 of other wasps, the Pepsince and the Aporince, for the structural characters 

 of these wasps clearly show that they have different habits from those in the 

 other subfamilies. 



