Coleoptera from South Africa. 179 



disk slightly convex, median part a little depressed longitudinally, 

 base deeply impressed above the scutellum, disk closely foveate, 

 the foveas small, and with a median longitudinal smooth line 

 reaching neither base nor apex ; elytra sub-cylindrical, sharply 

 carinate, punctures of the intervals deep, pubescence long ; under- 

 side and legs with short pubescence. Length 7, width 3 mm. 

 Hah. Zambezia (Salisbury). 



A. impressicolUs, n. sp. 



Brown or rusty-red, with the elytra and legs a little lighter than 

 the prothorax and antennae; head as in the preceding species ; pro- 

 thorax with dense, short pubescence, rounded at the sides in the 

 anterior part, sinuate near the base, disk a little convex in front, 

 moderately plane from the middle to the base, and having on each 

 side of the median part a very broad and deep pyriform impression, 

 while the lateral posterior part and also the median part of the 

 base are slightly impressed ; elytra sub-cylindrical, less pubescent 

 than the prothorax, acutely carinate and deeply punctate-striate ; 

 legs and underside as in the preceding species. Length 6, 

 width 2 mm. 



Sah. Zambezia (Salisbury). 



In A. imiyressicollis the intermediate joints of tlie 

 antennas are more moniliform from and including the 

 sixth than in the other species. 



AsYLEPTUS, n. gen. 



Mentum as in Acustus ; maxillary palpi with the last joint 

 triangular, bluntly truncate ; antennae moderately long, and 

 moderately thick, conical, the joints of nearly equal length, except 

 the basal one which is the longest, and the apical one which is a 

 little shorter, slender at the base, sub-pyriform at the tip and less 

 thickened than either of the two preceding joints ; eyes separated 

 by a narrow line on the vertex ; frontal crests produced in front, 

 meetiug in the centre, and perpendicularly carinate ; prothorax 

 and elytra as in Acastus ; legs more slender and a little longer than 

 in that genus, anterior tibiae not sinuated inwardly, the anterior 

 femora without any conical tooth. 



A. fmnosus, n. sp. 



Piceous, opaque, glabrous, antennae, palpi and legs reddish- 

 brown ; labrum and epistoma closely punctulate ; frontal part 

 produced in two projecting much raised crests, united in front, and 



