368 Transactions South African Philosophical Society, [vol. xiii. 



Mesosternal process arcuate at apex, maxillary 

 lobes simple in both sexes; anterior tibia in- 

 cised at the base, and femora strongly hamate 

 in the i Neptunides. 



d'. Inner part of anterior tibiae not denticulate 



in the g . 



Mesosternal process long, laminate, slightly 

 reflexed at tip ; inner lobe of maxillae dentate 

 in the <? , both hamate in the ? Ccelorrhina. 



Mesosternal process laminiform, triangularly 



acuminate, slightly reflexed at tip Stephanorrhina. 



1) . Clypeus sub-parallel in the <j , the centre of 

 the anterior margin produced in the £ into a 

 hi- or tri-fid. horn, occasionally reflexed and 

 laminate, or simple (Hetekoiuuiimi. 



E-. Sternal process strongly projecting beyond 

 the coxae. 



F 2 . Base of prothorax sinuate or arcuate 

 above the scutellum. 



a-. Scutellum grooved laterally. 



b-. Head simple in either sex. 



Mesosternal process with an orbicu- 

 lar or sub-orbicular suture ; inner 

 lobe of maxillae simple, upper one 

 truncate at apex and concave in- 

 wardly ; hind femora strongly deve- 

 loped, dentate at base in the 3 . . Eccoptocnemis. 



Mesosternal process very short, tri- 

 angular, both maxillary lobes simple 

 in either sex Scythropesthes. 



Mesosternal process long, broadly 

 triangular, slightly slanting down- 

 wards Inhambanc. 



b l . Head of J simple or provided with 

 two sub-porrect or porrect horns in 

 the<j . 



Mesosternal process long, slender 

 and st rongly recurred at apes ; inner 

 lobe of maxilla' hamate, upper one 

 sharply bi-hamate Melinesthes. 



Inner lobe of maxilla- with a hamate 

 tooth, upper lobe mucronate only 

 in both sexes. Head of J with an 

 horizontal basal horn overlying the 

 centre of the clypeus, the anterior 

 margin of which is reflexed into a 

 laminate process Genyodonta. 



