1908.] Catalogue of the Coleoptera of South Africa. 633 



Macroretrus singularis, n. sp. 



Black, shiny, antennal club fuscous, the pedicel flavous ; pro- 

 thorax with a small flavescent spot at the anterior angle ; elytra 

 fuscous black with two flavescent basal patches on each side and 

 a transverse band of the same colour above the apex, but when the 

 elytra are fuscous there are traces of a longitudinal band ascending 

 laterally towards the outer basal patch ; in some cases, probably 

 immature examples, the flavescent colour has invaded nearly the 

 whole surface except the suture ; $ clypeus truncate in front with 

 the angles rounded and the margin slightly reflexed, very vaguely 

 punctulate, the frontal part simple ; prothorax a little broader than 

 long, ampliate rounded laterally, plainly sinuate towards the base, 

 somewhat depressed on the upper side, closely and somewhat deeply 

 punctulate except for a smooth longitudinal median space reaching 

 from the apex to about the median part ; scutellum very long, sharply 

 triangular and punctulate at the base ; elytra not quite twice the 

 length of the prothorax, narrowly striate punctulate, with the inter- 

 vals convex and impunctate, the seventh and eighth striae reach 

 nearly to the same distance under the humeral callus, the ninth is 

 shorter than the eighth ; the $ differs from the S in the slightly less 

 blunted anterior part of the prothorax ; the punctures on the head, 

 and especially on the prothorax, are deeper and cover the whole 

 surface of the latter. 



The livery is not unlike that of A. cruentus, Kl. 



Length 3J-3f mm. ; width lj~2 mm. 



Hab. Southern Rhodesia (Sebakwe). 



Sub-Family TBOGIN.E. 



Gen. TROX., Cat. i., p. 452. 



Trox massalis, Har. 



Mitth. Munch. Entomol. Ver., 1880, p. 156. 



11 Lateral margin of prothorax denticulate ; elytra ampliated, 

 strongly convex, sinuate on each side at the base and with the 

 shoulders very acute, they have series of equal tubercles intermixed 

 with small tubercles. 



Length 15 mm. 



Hab. Hereroland. 



Shape of T. varicosus, the elytra highly convex, short and broadly 

 ovate, the greatest width being in the centre ; vertex with two dis-* 



