346 THE CANADIAN ENTOMOLOGIST. 



Second cubital cell not petiolate, receiving both recurrent nervures. 2. 



Second cubital cell petiolate, oblong, in outline almost elliptical, and 

 receiving both recurrent nervures ; cubitus in hind wings origi- 

 nating a little beyond the transverse median nervure or almost 

 interstitial Exeirus, Shuckard. 



2. Marginal cell lanceolate, without an appendage ; submedian cell 



longer than the median 3. 



Marginal cell at apex slightly rounded, ivitli an appendage ; sub- 

 median cell a little shorter than the median. 



First transverse cubitus broken by a stump of a vein a little 

 before the middle ; hind wings with the cubitus originating 

 much before the transverse median nervure. Kohlia, Handlirsch. 



3. Marginal cell almost twice as long as the first cubital cell, or at least 



one and a half times as long ; pygidial area in $ distinct, triangular ; 

 anterior tarsal joints 2-4 short, transverse. 



Cubitus in hind wings originating from about the apical third of 

 the submedian cell ; second cubital cell, along the cubitus, fully 

 four times or more longer than along the radius ; antennae 

 longer than the head and thorax united, subclavate ; abdomen 

 in ^ ending in a single spine. Species large . .Sphecius, Dahlbom. 



Cubitus in hind wings originating from the apical sixth of the 

 submedian cell ; second cubital cell, along the cubitus, scarcely 

 three times as long as along the radius ; antennae shorter than 

 the head and thorax united, strongly clavate ; abdomen in ^ 

 ending in two short teeth Ammatomus, Costa. 



Marginal cell not much longer than the first cubital cell ; cubitus in hind 

 wings originating a little before the transverse median nervure, or 

 almost interstitial ; abdomen in $ unarmed ( 9 

 unknown) Handlirschia, Kohl. 



4. Cubitus in hind wings originating far before the transverse median 



nervure, or never beyond the apical third of the submedian cell ; 

 mandibles simple ; intermediate tarsi longer than their tibii^, the 

 joints 3-4 short, lobed ; claws long, the pulvilli 



moderate Stizoides, Guerin. 



Cubitus in hind wings originating at about the apical fifth of the sub- 

 median cell ; mandibles dentate or simple. 



