292 THE CANADIAN ENTOMOLOGIST. 



Table of Subfamilies. 



Hind femora more or less thickened at apex^ and squarely truncate 

 and produced beneath ; cubitus in hind wings originating at a con- 

 siderable distance beyo?id the transverse median nervure ; meta- 

 notum with a well-defined triangular area at 

 base Subfamily I., Cercerinse. 



Hind femora not much thickened at apex, and neither squarely 

 truncate nor produced beneath ; cubitus in hind wings most 

 frequently interstitial, or originating before the transverse median 

 nervure, very rarely originating slightly beyond it; raetanotum most 

 frequently without a well-defined tiiangular area at 

 base Subfamily II., Philanthinas. 



Subfamily I. — Cercerin?e. 

 This subfamily is readily recognized by the shape of the hind 

 femora, which arc always thickened and squarely truncate at apex, and 

 produced into a process beneath, and also by the venation of the hind 

 wings, tlie cubitus always originating some distance beyond the transverse 

 median nervure. 



Only four genera are known, all predaceous on beetles, and distin- 

 guished as follows : 



Table of Genera. 



Second cubital cell petiolate 3- 



Second cubital cell not petiolate 2. 



2. Dorsal abdominal segments 2-4 with a median transverse furrow or 



impression. 



Third cubital cell quadrate, the third transverse cubitus uniting 

 with the marginal cell at apex ; lateral carince of the pygidium 



terminating in a tooth. S Eucerceris, Cresson. 



Third cubital cell not quadrate, the third transverse cubitus 

 oblique, uniting with the marginal cell much before its apex ; 

 lateral carina? of the pygidium in ^ not terminating in a 

 tooth Nectanebus, Spinola. 



3. Third cubital cell quadrate, the third transverse cubitus joining the 



marginal cell at apex ; dorsal abdominal segments 2-6 with a 

 median transverse farrow or impression. $ . . . Eucerceris, Cresson. 

 Third cubital cell not quadrate, the third transverse cubitus oblique, 

 joining the marginal cell much before the apex; dorsal abdominal 

 segments 2-6 without a median transverse furrow or impression, but 

 usually margined at apex. 



