272 THE CANADIAN ENTOMOLOGIST. 



Mesonotum with distinct, complete furrows 15. 



15. Antennae 13-jointed, maxillary palpi 6-, labial palpi 3-jointed. 



Scutellum bifoveate at base (13) Mesitius, Spinola. 



(Type M. Ghilianii, Spin.) 

 Scutellum not bifoveate at base, but with a transverse grooved 

 line. 



Maxilla bilobed at apex (14) Epyrus, Westwood. 



(Type E. niger, Westw.) 



Maxilla trilobed at apex (15) Calyoza, Westwood. 



(Type C staphylinoides, Westw.) 



16. Antenna? 12-jointed. (16) Anoxus, Thomson. 



(Type A. boops, Thorns.) 

 Antennae 13-jointed. 



Scutellum bifoveate at base (13) Mesitius, Spinola. 



? = Dolus, Motsch. 

 (Type M. Ghilianii, Spinola.) 

 Scutellum with a transverse grooved line at 



base (14) Epyris, Westwood. 



(Type E. niger, Westw.) 



1 7. Antennae. 12-jointed (16) Perisemus, Forster. 



(Type P. Triareolatus, Forst.) 



Antennae 13-jointed (17) Goniozus, Forster. 



(Type G. clavipennis, Forst.) 



18. Front wings with a distinct marginal cell, the radius always long, 



sometimes forming a closed marginal cell 23. 



Front wings without a distinct marginal cell, the radius wanting or 

 very short 19. 



19. Front wings with a short linear marginal vein and a short radius. . 21. 

 Front wings without marginal and radial veins 20. 



20. Antennas 12-jointed (8) Cephalonomia, Westwood. 



Antennas 13-jointed. 



Front wings with one basal cell (6) Ateleopterus, Forster. 



Front wings with two basal cells Scleroderma, Klug. 



21. Two basal cells in front wings. 



Antennae 13-jointed Laelius, Ashmead. 



Antennae 1 2-jointed Bethylus, Latreille. 



22. Front wings with an incomplete marginal cell .... 22. 



Front wings with a complete or closed marginal cell. 



