82 THE CANADIAN ENTOMOLOGIST. 



Metathorax clolhed with a line, usually dense, silvery pubescence ; 

 claws in $ cleft, in g with a median tooth. 



Submedian and median cells equal, the transverse median nervure 

 interstitial with the basal nervure ; third cubital cell large, 

 trapezoidal ; mandibles 2-dentate ; first joint of flagellum in <$ 



as long as the second (6) Sericopompilus, Ashm., g. nov. 



(Type Pompilus cinctipes, Cress.) 

 Submedian cell a little longer than the median ; third cubital 

 cell subtriangular; mandibles 3-dentate; first joint of flagellum 

 in g short, shorter than the 



second (7) Nannopompilus, Ashm., g. nov. 



(Type N. argenteus, Ashm., M. S.) 



8. Pronotum normal and always shorter than the mesonotum 9. 



Pronotum broad and as long as the mesonotum. 



Submedian cell in front wings much longer than the median; third 

 cubital cell large, not or only slightly narrowed 



above . (8) Hypoferreola, Ashm., g. nov. 



(Type Ferreola cephalotes, Sauss.) 



9. Wings red or ferruginous, their tips black ; third cubital cell sub- 



quadrangular or trapezoidal, never distinctly triangular ; mandibles 



2-dentate, the inner tooth large, acute (9) Epizuron, Schiodte. 



= Cryptocheilus, Panzer. 



(Type Pompilus rufipes, L.) 



Wings differently coloured, not red, usually fuscous or subfuscous ; 



mandibles in $ 3-dentate, the inner tooth small, in £ 2-dentate ; 



body marked with yellow or 



red (10) Poecilopompilus, Ashm., g. nov. 



(Type Pompilus navus, Cress.) 



10. Metathorax posteriorly rounded, not impressed, and without a distinct 



median longitudinal impressed line or furrow above, or this line is 



very vaguely defined * 9- 



Metathorax posteriorly truncate, impressed or emarginate, or with a 

 more or less distinct median longitudinal impressed line or furrow 

 above. 



Third cubital cell triangular, subtriangular, or at least always 

 strongly narrowed above and sometimes petiolate ; claws in % 

 with a median tooth, in $ cleft 16. 



