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



towards the anterior part the angles of which are broadly rounded, 

 and the anterior margin broadly arcuate, the outer face is very slightly 

 convex in the median part, and the whole ligular part depressed; the 

 labial palpi are inserted into a deep lateral condyle at some distance 

 from the anterior angles, and the last joint is somewhat broadly 

 fusiform at the base ; jaws robust, and with a double row of three 

 or four teeth set opposite each other in three tiers, the lower one 

 being more or less distinctly trifid, these teeth are set at right angles 

 to the inner edge of the maxillae which are truncate at the tip with 

 the outer angle sharp ; last joint of maxillary palps flail-like, longer 

 than all the joints taken together ; antennas 10- jointed with the club 

 elongate and 5- or 6-jointed in the male according to the development 

 of the last joint of the pedicel, or plainly 7-jointed; ovate and 5- or 

 6-jointed in the female, but with the last joint of the pedicel more or 

 less sharply acuminate ; clypeus narrowed laterally diagonally from 

 the narrow canthus of the eyes towards the anterior angle which is 

 never blunt, and is occasionally very sharp, and even projecting, and 

 slightly emarginate laterally near the anterior part, or deeply sinuate ; 

 the anterior margin is more or less deeply sinuate, the margin itself 

 being always reflexed, and when it is very highly raised there is a 

 faintly impressed line along the narrow, seemingly depressed part, 

 but there is no suture in the median part,* and the clypeal suture at 

 the junction with the head is straight, in some species the anterior 

 margin is bi-sinuate, and in one (A. rnfa) there is a somewhat 

 distinct, longitudinal keel in the middle of the anterior part ; pro- 

 thorax convex, almost twice as broad as long, ampliated laterally 

 in the centre with the anterior angles sharp and the posterior 

 rounded, fringed laterally by more or less dense hairs, and having 

 also a few hairs along the outer part of the anterior margin ; scu- 

 tellum cordate or ogival ; elytra somewhat ampliated and convex in 

 the posterior part, or sub-cylindrical, without any distinct dorsal 

 costules, and covering the rather broad propygidium ; pygidium 

 convex ; abdominal segments divided by deep sutures, but seemingly 

 fused, somewhat pubescent, pectus moderately pubescent ; anterior 

 tibiae bi-dentate outwardly and having a very long inner spur which 

 in some species curves conspicuously outwardly in the male 

 (A. amoena, fuscipennis) but shows also a tendency to curving in 

 the other species — in the female, however, this spur is straight ; 

 tarsi long, slender, claws more or less slender, divaricating, more 

 or less plainly cleft diagonally but not deeply underneath in the 

 anterior part ; in some species only the inner claw of the anterior 

 tarsi is cleft ; posterior coxae moderately robust, posterior tibiae 



* In A. pilosula there is, however, a faint, median, interrupted line. 



