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



base of the strongly reflexed outer angle, the median longitudinal 

 clypeal keel is short, but conspicuous, the frontal transverse keel is 

 very highly raised, the punctures are deeper on the clypeal than in 

 the frontal part, and more numerous along the base ; prothorax 

 of the same shape and with the same sculpture as T. vagus ; 

 scutellum similar ; elytra very slightly ampliated laterally past the 

 median part, and with the intervals deeply, moderately closely and 

 somewhat roughly punctate, epipleural fold with a series of extremely 

 short hairs ; under side as in T. vagus, but the punctures of the 

 abdominal segments, apart from the setigerous row, are much 

 shallower ; the anterior tibiae are tri-dentate, but the upper tooth is 

 blunt. The shape of the clasps of the genital armature of the male 

 is rightly delineated in fig. 29 ; these same clasps as figured under 

 the number 30 have been somewhat distorted in the mounting. 



Length 9-10 mm. ; width 6-7 mm. 



Hab. Southern Ehodesia (Salisbury). 



Trochalus inops, n. spec. 



Chestnut-brown, shining, iridescent ; antennae flavescent, except 

 the two basal joints of the pedicel, which are sub-ferruginous; it is 

 much smaller than T. mashunus and plainly ovate ; the clypeus is as 

 sharply tri-dentate in front, and the lateral margin as sharply aculeate, 

 but the median, longitudinal tubercle is hardly distinct ; the anterior 

 tibiae are bi-dentate outwardly ; the punctures on the prothorax and 

 scutellum are equally deep ; the elytra are also as deeply punctate, 

 but apart from the juxta-sutural one the striae are nearly 

 obliterated. 



Length 5-6 mm. ; width 4 mm. 



Hob. Southern Ehodesia (Mazoe), Ovampoland. 



Trochalus exasperans, n. spec. 



Bronze, with an iridescent sheen turning to reddish-bronze, 

 antennae flavescent ; intermediate in shape between T. mashunus 

 and T. rubricatus, the elytra are a little more ampliated laterally, 

 the clypeus is not so sharply tri-dentate, the punctuation is the same 

 as in T. mashunus and different from that of T. rubricatus, in which 

 the aciculate punctures, especially of the elytra, are hardly distinct, 

 and in which also the antenna! club of the male is much longer ; 

 the shape of the clasps of the genital armature resembles more that 

 of T. mashunus, from which it mainly differs in the more ampliato- 

 ovate elytra, the more bluntly tri-dentate clypeus, a longer antennal 



