512 Transactions South African Philosophical Society, [vol. xii. 



labial palpi short, apical joint longer than the two preceding put 

 together, swollen, ovate and sharp at tip ; external lobe of maxillae 

 armed with six sharp, claw-like teeth set opposite one another, but 

 with the two upper ones joined at base, maxillary palpi long, apical 

 joint longer than the second, slightly truncate at tip, fusiform and 

 carinate inwardly but straight outwardly (except in H. claudius, where 

 it is equally swollen on both sides and broadly truncate) ; mandibles 

 ending in three not very obtuse teeth recurved and projecting 

 beyond the clypeus ; head broad, not long, clypeus and genae sharply 

 carinate, the former strongly attenuate, straight at tip, and with the 

 apical margin dentate more or less sharply at an equal distance from 

 the outer angle and from the centre ; the clypeus is divided from the 

 frontal part by a clypeal transverse carina, sometimes tuberculate, 

 sometimes a little raised, and occasionally interrupted in the centre, 

 above this clypeal carina there is a frontal one strongly arcuate 

 laterally above and in front of the eye, and often commingling with 

 the clypeal one in the anterior part, eyes large, equally divided by 

 the canthus of the genae ; antennae ten-jointed, club elongato-ovate ; 

 prothorax not very convex, transverse, attenuate laterally in the 

 anterior part, nearly straight from the median part to the posterior 

 angle Avhich is not sharp, base not marginate, slightly sinuate on 

 each side of the middle ; scutellum somewhat large, ogival ; elytra 

 nearly parallel for a third of the length, slightly ampliate laterally 

 from there, rounded behind and somewhat convex in the posterior 

 half of the disk, they are glabrous and have a series of scar-like 

 round punctures forming a more or less deep striation, but the 

 juxta-sutural stria is not punctate, and the second one is obliquely 

 divergent in the anterior part, and seldom reaches the base, while 

 the three dorsal ones are there deeply impressed ; the epipleura are 

 hardly visible, and the elytra do not quite cover the propygidium 

 which bears in the centre two series of transverse, stridulating striae ; 

 the pygidium is convex in both sexes, but more transversely so in the 

 female than in the male ; the abdominal segments are glabrous 

 except for a transverse lateral series of setigerous punctures varying 

 in number on the intermediate abdominal segments, in the male 

 the apical abdominal segment is strongly sinuate and constricted 

 laterally owing to the lateral development of the inferior surface of 

 the pygidium which in the median part is reduced often to a mere 

 fold, but which in some species is broader and has in the centre a 

 transverse excavation ; lateral part of abdominal segments and sides 

 of the metasternum granular, the latter smooth and impressed longi- 

 tudinally in the centre ; prosternum with a thick horizontal carina at 

 base ending in a round or ogival setiferous blunt process under the 



