THE CANADIAN ENTOMOLOGIST. 83 



Third cubital cell large, trapezoidal, or at least never distinctly 

 triangular nor petiolate 1 1 . 



i r. Claws in $ with a median tooth, in $ cleft; metathorax posteriorly 



not striate . . 12. 



Claws cleft in both sexes ; metathorax posteriorly 



striate (11) Pseudoferreola, Radoszk. 



(Type P. striata, Radosz.) 



12. Transverse median nervure in front wings interstitial with the basal 



nervure, the median and submedian cells of an equal length. ... 14. 



Transverse median nervure in front wings not interstitial with the 



basal nervure, the submedian cell more or less distinctly the 



longer 13. 



1 3. Clypeus anteriorly truncate or very slightly rounded, without a median 



sinus ; body black or blue-black ; pronotum posteriorly obtusely 

 angularly emarginate, first joint of flagellum in 9- longer than the 

 second, in <$ not or scarcely longer than the second, but at least 

 thrice as long as thick ; tarsal comb short and 



sparse (12) Pycnopompilus, Ashm., g. nov. 



(Type Pompilus scelestus, Cress.) 



14. Clypeus in 9 with a median sinus, in g simple, the labrum slightly 



exposed 15. 



Clypeus in both sexes truncate or slightly rounded, without a median 

 sinus. 



Body black or blue-black, the abdomen partly red ; first joint of 

 flagellum very elongate, much longer than the second; posterior 

 face of metathorax concave, the upper and lower angles ob- 

 tusely dentate ; third cubital cell very large, the second 



quadrangular (Siam) (13) Tachypompilus, Ashm., g. nov. 



(Type T. Abbotti, Ashm., M. S.) 



Head and thorax black, the abdomen towards base marked with 



red ; posterior face of metathorax only slightly impressed ; 



third cubital cell triangular (21) Entypus, Dahlb. (part). 



15. Abdomen red or marked with red or yellow, rarely wholly black ; first 



joint of flagellum in °. elongate, longer than the second; in $ short, 

 never longer than the 



second (14) Arachnophroctonus, Ashm., g. nov. 



(Type Pompilus ferrugineus, Say.) 



