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



E 2 . Basal angle broadly rounded. 



a 2 . Clypeus broadly truncated and emarginated. 



Median part of clypeal ridge directed backwards ; 

 penultimate abdominal segment not broader than 

 the preceding one infantilis. 



Scutellum very closely punctate. 



Median part of clypeal ridge straight in the centre, 

 strongly sinuate on each side ; penultimate abdo- 

 minal segment broader than the preceding one. 



Head broad, clypeus deeply emarginate ; pygidium 



punctured ; scutellum very closely punctate . . transvaalica. 



Head moderately broad, clypeus emarginate ; 

 pygidium with a longitudinal, median, impunctate 

 space; scutellum punctate laterally only .. .. parilis. 



a 1 . Clypeus obtuse or not broadly truncate. 



I) 2 . Clypeus not plainly sinuate. 



Penultimate abdominal segment not broader than 



the preceding one, the ultimate swollen puerUi*. 



Penultimate abdominal segment broader than the 

 preceding one, the ultimate broad, swollen ; lower 

 tooth of each claw robust disputdbilis. 



Penultimate segment broader than the one pre- 

 ceding, the ultimate narrow, plane ; lower tooth of 

 each claw very small mediastina. 



b l . Clypeus sinuate. 



Penultimate abdominal segment not broader than 

 the one preceding, ultimate one moderately broad, 

 not swollen inedita. 



E 1 . Basal angle sharp. 



F 2 . Prothorax plainly bi-impressed on each side 

 near the apex and near the base. 



F 1 . Prothorax not distinctly bi-impressed. 



a 2 . Clypeal carina straight. 



Clypeus broadly truncate in front, frontal part 

 with a faint longitudinal ridge, but in the male 

 only meracula. 



a 1 . Clypeal carina arcuate. 



G 2 . Penultimate abdominal segment not broader 

 than the preceding one. 



H 2 . Body slender, sub-cylindrical in both sexes. 



