82 THE CANADIAN ENTOMOLOGIST. 



16 ( 5) Lateral margins of pronotum prominent 



anteriorly 24. Delocephahis Distant. 



17 ( 4) Hind angles of pronotum acutangular near the 



scutellum 23. Megarrhamphus Bergr. 



18 ( 3) Interoanterior angles of pronotum produced, or at least 



strongl}' dentate 3. Lohopeltista Schout. 



19 (2) Lateral angles of pronotum strongly acute or very 



prominent, 



20 (27) Lateral angles of pronotum not turned forward. 



21 (24) Lateral lobes of head contiguous in front of the median 



lobe. 



22 (23) Anterolateral margins of pronotum 



straight 7. Mercatns Distant. 



23 (22) Anterolateral margins of pronotum 



sinuate 9. Schismatops Dallas. 



24 (21) Lateral lobes not contiguous, unless at the base. 



25 (26) Interolateral margins of lateral lobes as long as from apex 



of median lobe to base; lateral angles of pronotum 

 acuminate 18. Diplorhiniis A. & S. 



26 (25) Interolateral margin very short in front of median lobe; 



lateral angles of pronotum acute . 4. Storthogaster Karsch. 



27 (20) Lateral angles of pronotum turned more or less forward. 



28 (29) Lateral angles of pronotum prominent, but apically 



blunt 8. Sandehana Distant. 



29 (28) Lateral angles of pronotum acute. 



30 (33) Anterolateral margins of pronotum slightly sinuate. 



31 (32) Antennae longer, second joint reaching or scarcely exceed- 



ing apex of head ; lateral angles of pronotum 



produced 12. Gonopsis A. & S. 



32 (31) Antennae shorter, second joint scarcely reaching apex of 



head; lateral angles of pronotum rounded, scarcely 

 prominent 13. Kaffraria Kirk. 



33 (30) Anterolateral margins of pronotum deeply 



emarginate 19. Macrina A. & S. 



34 ( l) Pronotum with lateral angles prominently extending for- 



wards very distinctly beyond the eyes. 



